+++ /dev/null
-What: /sys/kernel/debug/kmemtrace/
-Date: July 2008
-Contact: Eduard - Gabriel Munteanu <eduard.munteanu@linux360.ro>
-Description:
-
-In kmemtrace-enabled kernels, the following files are created:
-
-/sys/kernel/debug/kmemtrace/
- cpu<n> (0400) Per-CPU tracing data, see below. (binary)
- total_overruns (0400) Total number of bytes which were dropped from
- cpu<n> files because of full buffer condition,
- non-binary. (text)
- abi_version (0400) Kernel's kmemtrace ABI version. (text)
-
-Each per-CPU file should be read according to the relay interface. That is,
-the reader should set affinity to that specific CPU and, as currently done by
-the userspace application (though there are other methods), use poll() with
-an infinite timeout before every read(). Otherwise, erroneous data may be
-read. The binary data has the following _core_ format:
-
- Event ID (1 byte) Unsigned integer, one of:
- 0 - represents an allocation (KMEMTRACE_EVENT_ALLOC)
- 1 - represents a freeing of previously allocated memory
- (KMEMTRACE_EVENT_FREE)
- Type ID (1 byte) Unsigned integer, one of:
- 0 - this is a kmalloc() / kfree()
- 1 - this is a kmem_cache_alloc() / kmem_cache_free()
- 2 - this is a __get_free_pages() et al.
- Event size (2 bytes) Unsigned integer representing the
- size of this event. Used to extend
- kmemtrace. Discard the bytes you
- don't know about.
- Sequence number (4 bytes) Signed integer used to reorder data
- logged on SMP machines. Wraparound
- must be taken into account, although
- it is unlikely.
- Caller address (8 bytes) Return address to the caller.
- Pointer to mem (8 bytes) Pointer to target memory area. Can be
- NULL, but not all such calls might be
- recorded.
-
-In case of KMEMTRACE_EVENT_ALLOC events, the next fields follow:
-
- Requested bytes (8 bytes) Total number of requested bytes,
- unsigned, must not be zero.
- Allocated bytes (8 bytes) Total number of actually allocated
- bytes, unsigned, must not be lower
- than requested bytes.
- Requested flags (4 bytes) GFP flags supplied by the caller.
- Target CPU (4 bytes) Signed integer, valid for event id 1.
- If equal to -1, target CPU is the same
- as origin CPU, but the reverse might
- not be true.
-
-The data is made available in the same endianness the machine has.
-
-Other event ids and type ids may be defined and added. Other fields may be
-added by increasing event size, but see below for details.
-Every modification to the ABI, including new id definitions, are followed
-by bumping the ABI version by one.
-
-Adding new data to the packet (features) is done at the end of the mandatory
-data:
- Feature size (2 byte)
- Feature ID (1 byte)
- Feature data (Feature size - 3 bytes)
-
-
-Users:
- kmemtrace-user - git://repo.or.cz/kmemtrace-user.git
-
+++ /dev/null
- kmemtrace - Kernel Memory Tracer
-
- by Eduard - Gabriel Munteanu
- <eduard.munteanu@linux360.ro>
-
-I. Introduction
-===============
-
-kmemtrace helps kernel developers figure out two things:
-1) how different allocators (SLAB, SLUB etc.) perform
-2) how kernel code allocates memory and how much
-
-To do this, we trace every allocation and export information to the userspace
-through the relay interface. We export things such as the number of requested
-bytes, the number of bytes actually allocated (i.e. including internal
-fragmentation), whether this is a slab allocation or a plain kmalloc() and so
-on.
-
-The actual analysis is performed by a userspace tool (see section III for
-details on where to get it from). It logs the data exported by the kernel,
-processes it and (as of writing this) can provide the following information:
-- the total amount of memory allocated and fragmentation per call-site
-- the amount of memory allocated and fragmentation per allocation
-- total memory allocated and fragmentation in the collected dataset
-- number of cross-CPU allocation and frees (makes sense in NUMA environments)
-
-Moreover, it can potentially find inconsistent and erroneous behavior in
-kernel code, such as using slab free functions on kmalloc'ed memory or
-allocating less memory than requested (but not truly failed allocations).
-
-kmemtrace also makes provisions for tracing on some arch and analysing the
-data on another.
-
-II. Design and goals
-====================
-
-kmemtrace was designed to handle rather large amounts of data. Thus, it uses
-the relay interface to export whatever is logged to userspace, which then
-stores it. Analysis and reporting is done asynchronously, that is, after the
-data is collected and stored. By design, it allows one to log and analyse
-on different machines and different arches.
-
-As of writing this, the ABI is not considered stable, though it might not
-change much. However, no guarantees are made about compatibility yet. When
-deemed stable, the ABI should still allow easy extension while maintaining
-backward compatibility. This is described further in Documentation/ABI.
-
-Summary of design goals:
- - allow logging and analysis to be done across different machines
- - be fast and anticipate usage in high-load environments (*)
- - be reasonably extensible
- - make it possible for GNU/Linux distributions to have kmemtrace
- included in their repositories
-
-(*) - one of the reasons Pekka Enberg's original userspace data analysis
- tool's code was rewritten from Perl to C (although this is more than a
- simple conversion)
-
-
-III. Quick usage guide
-======================
-
-1) Get a kernel that supports kmemtrace and build it accordingly (i.e. enable
-CONFIG_KMEMTRACE).
-
-2) Get the userspace tool and build it:
-$ git clone git://repo.or.cz/kmemtrace-user.git # current repository
-$ cd kmemtrace-user/
-$ ./autogen.sh
-$ ./configure
-$ make
-
-3) Boot the kmemtrace-enabled kernel if you haven't, preferably in the
-'single' runlevel (so that relay buffers don't fill up easily), and run
-kmemtrace:
-# '$' does not mean user, but root here.
-$ mount -t debugfs none /sys/kernel/debug
-$ mount -t proc none /proc
-$ cd path/to/kmemtrace-user/
-$ ./kmemtraced
-Wait a bit, then stop it with CTRL+C.
-$ cat /sys/kernel/debug/kmemtrace/total_overruns # Check if we didn't
- # overrun, should
- # be zero.
-$ (Optionally) [Run kmemtrace_check separately on each cpu[0-9]*.out file to
- check its correctness]
-$ ./kmemtrace-report
-
-Now you should have a nice and short summary of how the allocator performs.
-
-IV. FAQ and known issues
-========================
-
-Q: 'cat /sys/kernel/debug/kmemtrace/total_overruns' is non-zero, how do I fix
-this? Should I worry?
-A: If it's non-zero, this affects kmemtrace's accuracy, depending on how
-large the number is. You can fix it by supplying a higher
-'kmemtrace.subbufs=N' kernel parameter.
----
-
-Q: kmemtrace_check reports errors, how do I fix this? Should I worry?
-A: This is a bug and should be reported. It can occur for a variety of
-reasons:
- - possible bugs in relay code
- - possible misuse of relay by kmemtrace
- - timestamps being collected unorderly
-Or you may fix it yourself and send us a patch.
----
-
-Q: kmemtrace_report shows many errors, how do I fix this? Should I worry?
-A: This is a known issue and I'm working on it. These might be true errors
-in kernel code, which may have inconsistent behavior (e.g. allocating memory
-with kmem_cache_alloc() and freeing it with kfree()). Pekka Enberg pointed
-out this behavior may work with SLAB, but may fail with other allocators.
-
-It may also be due to lack of tracing in some unusual allocator functions.
-
-We don't want bug reports regarding this issue yet.
----
-
-V. See also
-===========
-
-Documentation/kernel-parameters.txt
-Documentation/ABI/testing/debugfs-kmemtrace
-
F: mm/kmemleak.c
F: mm/kmemleak-test.c
-KMEMTRACE
-M: Eduard - Gabriel Munteanu <eduard.munteanu@linux360.ro>
-S: Maintained
-F: Documentation/trace/kmemtrace.txt
-F: include/linux/kmemtrace.h
-F: kernel/trace/kmemtrace.c
-
KPROBES
M: Ananth N Mavinakayanahalli <ananth@in.ibm.com>
M: Anil S Keshavamurthy <anil.s.keshavamurthy@intel.com>
#ifdef CONFIG_FSL_EMB_PERF_EVENT
#include <asm/perf_event_fsl_emb.h>
#endif
+
+#ifdef CONFIG_PERF_EVENTS
+#include <asm/ptrace.h>
+#include <asm/reg.h>
+
+#define perf_arch_fetch_caller_regs(regs, __ip) \
+ do { \
+ (regs)->nip = __ip; \
+ (regs)->gpr[1] = *(unsigned long *)__get_SP(); \
+ asm volatile("mfmsr %0" : "=r" ((regs)->msr)); \
+ } while (0)
+#endif
_GLOBAL(__restore_cpu_power7)
/* place holder */
blr
-
-/*
- * Get a minimal set of registers for our caller's nth caller.
- * r3 = regs pointer, r5 = n.
- *
- * We only get R1 (stack pointer), NIP (next instruction pointer)
- * and LR (link register). These are all we can get in the
- * general case without doing complicated stack unwinding, but
- * fortunately they are enough to do a stack backtrace, which
- * is all we need them for.
- */
-_GLOBAL(perf_arch_fetch_caller_regs)
- mr r6,r1
- cmpwi r5,0
- mflr r4
- ble 2f
- mtctr r5
-1: PPC_LL r6,0(r6)
- bdnz 1b
- PPC_LL r4,PPC_LR_STKOFF(r6)
-2: PPC_LL r7,0(r6)
- PPC_LL r7,PPC_LR_STKOFF(r7)
- PPC_STL r6,GPR1-STACK_FRAME_OVERHEAD(r3)
- PPC_STL r4,_NIP-STACK_FRAME_OVERHEAD(r3)
- PPC_STL r7,_LINK-STACK_FRAME_OVERHEAD(r3)
- blr
#define PERF_EVENT_INDEX_OFFSET 0
#ifdef CONFIG_PERF_EVENTS
+#include <asm/ptrace.h>
+
extern void init_hw_perf_events(void);
+
+extern void
+__perf_arch_fetch_caller_regs(struct pt_regs *regs, unsigned long ip, int skip);
+
+#define perf_arch_fetch_caller_regs(pt_regs, ip) \
+ __perf_arch_fetch_caller_regs(pt_regs, ip, 1);
#else
static inline void init_hw_perf_events(void) { }
#endif
.size stack_trace_flush,.-stack_trace_flush
#ifdef CONFIG_PERF_EVENTS
- .globl perf_arch_fetch_caller_regs
- .type perf_arch_fetch_caller_regs,#function
-perf_arch_fetch_caller_regs:
+ .globl __perf_arch_fetch_caller_regs
+ .type __perf_arch_fetch_caller_regs,#function
+__perf_arch_fetch_caller_regs:
/* We always read the %pstate into %o5 since we will use
* that to construct a fake %tstate to store into the regs.
*/
extern unsigned long perf_misc_flags(struct pt_regs *regs);
#define perf_misc_flags(regs) perf_misc_flags(regs)
+#include <asm/stacktrace.h>
+
+/*
+ * We abuse bit 3 from flags to pass exact information, see perf_misc_flags
+ * and the comment with PERF_EFLAGS_EXACT.
+ */
+#define perf_arch_fetch_caller_regs(regs, __ip) { \
+ (regs)->ip = (__ip); \
+ (regs)->bp = caller_frame_pointer(); \
+ (regs)->cs = __KERNEL_CS; \
+ regs->flags = 0; \
+}
+
#else
static inline void init_hw_perf_events(void) { }
static inline void perf_events_lapic_init(void) { }
+/*
+ * Copyright (C) 1991, 1992 Linus Torvalds
+ * Copyright (C) 2000, 2001, 2002 Andi Kleen, SuSE Labs
+ */
+
#ifndef _ASM_X86_STACKTRACE_H
#define _ASM_X86_STACKTRACE_H
+#include <linux/uaccess.h>
+
extern int kstack_depth_to_print;
struct thread_info;
unsigned long *stack, unsigned long bp,
const struct stacktrace_ops *ops, void *data);
+#ifdef CONFIG_X86_32
+#define STACKSLOTS_PER_LINE 8
+#define get_bp(bp) asm("movl %%ebp, %0" : "=r" (bp) :)
+#else
+#define STACKSLOTS_PER_LINE 4
+#define get_bp(bp) asm("movq %%rbp, %0" : "=r" (bp) :)
+#endif
+
+extern void
+show_trace_log_lvl(struct task_struct *task, struct pt_regs *regs,
+ unsigned long *stack, unsigned long bp, char *log_lvl);
+
+extern void
+show_stack_log_lvl(struct task_struct *task, struct pt_regs *regs,
+ unsigned long *sp, unsigned long bp, char *log_lvl);
+
+extern unsigned int code_bytes;
+
+/* The form of the top of the frame on the stack */
+struct stack_frame {
+ struct stack_frame *next_frame;
+ unsigned long return_address;
+};
+
+struct stack_frame_ia32 {
+ u32 next_frame;
+ u32 return_address;
+};
+
+static inline unsigned long caller_frame_pointer(void)
+{
+ struct stack_frame *frame;
+
+ get_bp(frame);
+
+#ifdef CONFIG_FRAME_POINTER
+ frame = frame->next_frame;
+#endif
+
+ return (unsigned long)frame;
+}
+
#endif /* _ASM_X86_STACKTRACE_H */
.walk_stack = print_context_stack_bp,
};
-#include "../dumpstack.h"
-
static void
perf_callchain_kernel(struct pt_regs *regs, struct perf_callchain_entry *entry)
{
return entry;
}
-void perf_arch_fetch_caller_regs(struct pt_regs *regs, unsigned long ip, int skip)
-{
- regs->ip = ip;
- /*
- * perf_arch_fetch_caller_regs adds another call, we need to increment
- * the skip level
- */
- regs->bp = rewind_frame_pointer(skip + 1);
- regs->cs = __KERNEL_CS;
- /*
- * We abuse bit 3 to pass exact information, see perf_misc_flags
- * and the comment with PERF_EFLAGS_EXACT.
- */
- regs->flags = 0;
-}
-
unsigned long perf_instruction_pointer(struct pt_regs *regs)
{
unsigned long ip;
#include <asm/stacktrace.h>
-#include "dumpstack.h"
int panic_on_unrecovered_nmi;
int panic_on_io_nmi;
+++ /dev/null
-/*
- * Copyright (C) 1991, 1992 Linus Torvalds
- * Copyright (C) 2000, 2001, 2002 Andi Kleen, SuSE Labs
- */
-
-#ifndef DUMPSTACK_H
-#define DUMPSTACK_H
-
-#ifdef CONFIG_X86_32
-#define STACKSLOTS_PER_LINE 8
-#define get_bp(bp) asm("movl %%ebp, %0" : "=r" (bp) :)
-#else
-#define STACKSLOTS_PER_LINE 4
-#define get_bp(bp) asm("movq %%rbp, %0" : "=r" (bp) :)
-#endif
-
-#include <linux/uaccess.h>
-
-extern void
-show_trace_log_lvl(struct task_struct *task, struct pt_regs *regs,
- unsigned long *stack, unsigned long bp, char *log_lvl);
-
-extern void
-show_stack_log_lvl(struct task_struct *task, struct pt_regs *regs,
- unsigned long *sp, unsigned long bp, char *log_lvl);
-
-extern unsigned int code_bytes;
-
-/* The form of the top of the frame on the stack */
-struct stack_frame {
- struct stack_frame *next_frame;
- unsigned long return_address;
-};
-
-struct stack_frame_ia32 {
- u32 next_frame;
- u32 return_address;
-};
-
-static inline unsigned long rewind_frame_pointer(int n)
-{
- struct stack_frame *frame;
-
- get_bp(frame);
-
-#ifdef CONFIG_FRAME_POINTER
- while (n--) {
- if (probe_kernel_address(&frame->next_frame, frame))
- break;
- }
-#endif
-
- return (unsigned long)frame;
-}
-
-#endif /* DUMPSTACK_H */
#include <asm/stacktrace.h>
-#include "dumpstack.h"
-
void dump_trace(struct task_struct *task, struct pt_regs *regs,
unsigned long *stack, unsigned long bp,
#include <asm/stacktrace.h>
-#include "dumpstack.h"
#define N_EXCEPTION_STACKS_END \
(N_EXCEPTION_STACKS + DEBUG_STKSZ/EXCEPTION_STKSZ - 2)
return 0;
}
-static void save_stack_address(void *data, unsigned long addr, int reliable)
+static void
+__save_stack_address(void *data, unsigned long addr, bool reliable, bool nosched)
{
struct stack_trace *trace = data;
+#ifdef CONFIG_FRAME_POINTER
if (!reliable)
return;
+#endif
+ if (nosched && in_sched_functions(addr))
+ return;
if (trace->skip > 0) {
trace->skip--;
return;
trace->entries[trace->nr_entries++] = addr;
}
+static void save_stack_address(void *data, unsigned long addr, int reliable)
+{
+ return __save_stack_address(data, addr, reliable, false);
+}
+
static void
save_stack_address_nosched(void *data, unsigned long addr, int reliable)
{
- struct stack_trace *trace = (struct stack_trace *)data;
- if (!reliable)
- return;
- if (in_sched_functions(addr))
- return;
- if (trace->skip > 0) {
- trace->skip--;
- return;
- }
- if (trace->nr_entries < trace->max_entries)
- trace->entries[trace->nr_entries++] = addr;
+ return __save_stack_address(data, addr, reliable, true);
}
static const struct stacktrace_ops save_stack_ops = {
/* Userspace stacktrace - based on kernel/trace/trace_sysprof.c */
-struct stack_frame {
+struct stack_frame_user {
const void __user *next_fp;
unsigned long ret_addr;
};
-static int copy_stack_frame(const void __user *fp, struct stack_frame *frame)
+static int
+copy_stack_frame(const void __user *fp, struct stack_frame_user *frame)
{
int ret;
trace->entries[trace->nr_entries++] = regs->ip;
while (trace->nr_entries < trace->max_entries) {
- struct stack_frame frame;
+ struct stack_frame_user frame;
frame.next_fp = NULL;
frame.ret_addr = 0;
+++ /dev/null
-/*
- * Copyright (C) 2008 Eduard - Gabriel Munteanu
- *
- * This file is released under GPL version 2.
- */
-
-#ifndef _LINUX_KMEMTRACE_H
-#define _LINUX_KMEMTRACE_H
-
-#ifdef __KERNEL__
-
-#include <trace/events/kmem.h>
-
-#ifdef CONFIG_KMEMTRACE
-extern void kmemtrace_init(void);
-#else
-static inline void kmemtrace_init(void)
-{
-}
-#endif
-
-#endif /* __KERNEL__ */
-
-#endif /* _LINUX_KMEMTRACE_H */
-
extern void __perf_sw_event(u32, u64, int, struct pt_regs *, u64);
-extern void
-perf_arch_fetch_caller_regs(struct pt_regs *regs, unsigned long ip, int skip);
+#ifndef perf_arch_fetch_caller_regs
+static inline void
+perf_arch_fetch_caller_regs(struct regs *regs, unsigned long ip) { }
+#endif
/*
* Take a snapshot of the regs. Skip ip and frame pointer to
* - bp for callchains
* - eflags, for future purposes, just in case
*/
-static inline void perf_fetch_caller_regs(struct pt_regs *regs, int skip)
+static inline void perf_fetch_caller_regs(struct pt_regs *regs)
{
- unsigned long ip;
-
memset(regs, 0, sizeof(*regs));
- switch (skip) {
- case 1 :
- ip = CALLER_ADDR0;
- break;
- case 2 :
- ip = CALLER_ADDR1;
- break;
- case 3 :
- ip = CALLER_ADDR2;
- break;
- case 4:
- ip = CALLER_ADDR3;
- break;
- /* No need to support further for now */
- default:
- ip = 0;
- }
-
- return perf_arch_fetch_caller_regs(regs, ip, skip);
+ perf_arch_fetch_caller_regs(regs, CALLER_ADDR0);
}
static inline void
struct pt_regs hot_regs;
if (!regs) {
- perf_fetch_caller_regs(&hot_regs, 1);
+ perf_fetch_caller_regs(&hot_regs);
regs = &hot_regs;
}
__perf_sw_event(event_id, nr, nmi, regs, addr);
#include <asm/page.h> /* kmalloc_sizes.h needs PAGE_SIZE */
#include <asm/cache.h> /* kmalloc_sizes.h needs L1_CACHE_BYTES */
#include <linux/compiler.h>
-#include <linux/kmemtrace.h>
+
+#include <trace/events/kmem.h>
#ifndef ARCH_KMALLOC_MINALIGN
/*
#include <linux/gfp.h>
#include <linux/workqueue.h>
#include <linux/kobject.h>
-#include <linux/kmemtrace.h>
#include <linux/kmemleak.h>
+#include <trace/events/kmem.h>
+
enum stat_item {
ALLOC_FASTPATH, /* Allocation from cpu slab */
ALLOC_SLOWPATH, /* Allocation by getting a new cpu slab */
+++ /dev/null
-#ifndef _LINUX_TRACE_BOOT_H
-#define _LINUX_TRACE_BOOT_H
-
-#include <linux/module.h>
-#include <linux/kallsyms.h>
-#include <linux/init.h>
-
-/*
- * Structure which defines the trace of an initcall
- * while it is called.
- * You don't have to fill the func field since it is
- * only used internally by the tracer.
- */
-struct boot_trace_call {
- pid_t caller;
- char func[KSYM_SYMBOL_LEN];
-};
-
-/*
- * Structure which defines the trace of an initcall
- * while it returns.
- */
-struct boot_trace_ret {
- char func[KSYM_SYMBOL_LEN];
- int result;
- unsigned long long duration; /* nsecs */
-};
-
-#ifdef CONFIG_BOOT_TRACER
-/* Append the traces on the ring-buffer */
-extern void trace_boot_call(struct boot_trace_call *bt, initcall_t fn);
-extern void trace_boot_ret(struct boot_trace_ret *bt, initcall_t fn);
-
-/* Tells the tracer that smp_pre_initcall is finished.
- * So we can start the tracing
- */
-extern void start_boot_trace(void);
-
-/* Resume the tracing of other necessary events
- * such as sched switches
- */
-extern void enable_boot_trace(void);
-
-/* Suspend this tracing. Actually, only sched_switches tracing have
- * to be suspended. Initcalls doesn't need it.)
- */
-extern void disable_boot_trace(void);
-#else
-static inline
-void trace_boot_call(struct boot_trace_call *bt, initcall_t fn) { }
-
-static inline
-void trace_boot_ret(struct boot_trace_ret *bt, initcall_t fn) { }
-
-static inline void start_boot_trace(void) { }
-static inline void enable_boot_trace(void) { }
-static inline void disable_boot_trace(void) { }
-#endif /* CONFIG_BOOT_TRACER */
-
-#endif /* __LINUX_TRACE_BOOT_H */
int __data_size; \
int rctx; \
\
- perf_fetch_caller_regs(&__regs, 1); \
+ perf_fetch_caller_regs(&__regs); \
\
__data_size = ftrace_get_offsets_##call(&__data_offsets, args); \
__entry_size = ALIGN(__data_size + sizeof(*entry) + sizeof(u32),\
#include <linux/ftrace.h>
#include <linux/async.h>
#include <linux/kmemcheck.h>
-#include <linux/kmemtrace.h>
#include <linux/sfi.h>
#include <linux/shmem_fs.h>
#include <linux/slab.h>
-#include <trace/boot.h>
#include <asm/io.h>
#include <asm/bugs.h>
#endif
page_cgroup_init();
enable_debug_pagealloc();
- kmemtrace_init();
kmemleak_init();
debug_objects_mem_init();
idr_init_cache();
core_param(initcall_debug, initcall_debug, bool, 0644);
static char msgbuf[64];
-static struct boot_trace_call call;
-static struct boot_trace_ret ret;
int do_one_initcall(initcall_t fn)
{
int count = preempt_count();
ktime_t calltime, delta, rettime;
+ unsigned long long duration;
+ int ret;
if (initcall_debug) {
- call.caller = task_pid_nr(current);
- printk("calling %pF @ %i\n", fn, call.caller);
+ printk("calling %pF @ %i\n", fn, task_pid_nr(current));
calltime = ktime_get();
- trace_boot_call(&call, fn);
- enable_boot_trace();
}
- ret.result = fn();
+ ret = fn();
if (initcall_debug) {
- disable_boot_trace();
rettime = ktime_get();
delta = ktime_sub(rettime, calltime);
- ret.duration = (unsigned long long) ktime_to_ns(delta) >> 10;
- trace_boot_ret(&ret, fn);
- printk("initcall %pF returned %d after %Ld usecs\n", fn,
- ret.result, ret.duration);
+ duration = (unsigned long long) ktime_to_ns(delta) >> 10;
+ printk("initcall %pF returned %d after %lld usecs\n", fn,
+ ret, duration);
}
msgbuf[0] = 0;
- if (ret.result && ret.result != -ENODEV && initcall_debug)
- sprintf(msgbuf, "error code %d ", ret.result);
+ if (ret && ret != -ENODEV && initcall_debug)
+ sprintf(msgbuf, "error code %d ", ret);
if (preempt_count() != count) {
strlcat(msgbuf, "preemption imbalance ", sizeof(msgbuf));
printk("initcall %pF returned with %s\n", fn, msgbuf);
}
- return ret.result;
+ return ret;
}
smp_prepare_cpus(setup_max_cpus);
do_pre_smp_initcalls();
- start_boot_trace();
smp_init();
sched_init_smp();
return NULL;
}
-__weak
-void perf_arch_fetch_caller_regs(struct pt_regs *regs, unsigned long ip, int skip)
-{
-}
-
/*
* We assume there is only KVM supporting the callbacks.
help
Basic tracer to catch the syscall entry and exit events.
-config BOOT_TRACER
- bool "Trace boot initcalls"
- select GENERIC_TRACER
- select CONTEXT_SWITCH_TRACER
- help
- This tracer helps developers to optimize boot times: it records
- the timings of the initcalls and traces key events and the identity
- of tasks that can cause boot delays, such as context-switches.
-
- Its aim is to be parsed by the scripts/bootgraph.pl tool to
- produce pretty graphics about boot inefficiencies, giving a visual
- representation of the delays during initcalls - but the raw
- /debug/tracing/trace text output is readable too.
-
- You must pass in initcall_debug and ftrace=initcall to the kernel
- command line to enable this on bootup.
-
config TRACE_BRANCH_PROFILING
bool
select GENERIC_TRACER
Say N if unsure.
-config KMEMTRACE
- bool "Trace SLAB allocations"
- select GENERIC_TRACER
- help
- kmemtrace provides tracing for slab allocator functions, such as
- kmalloc, kfree, kmem_cache_alloc, kmem_cache_free, etc. Collected
- data is then fed to the userspace application in order to analyse
- allocation hotspots, internal fragmentation and so on, making it
- possible to see how well an allocator performs, as well as debug
- and profile kernel code.
-
- This requires an userspace application to use. See
- Documentation/trace/kmemtrace.txt for more information.
-
- Saying Y will make the kernel somewhat larger and slower. However,
- if you disable kmemtrace at run-time or boot-time, the performance
- impact is minimal (depending on the arch the kernel is built for).
-
- If unsure, say N.
-
config WORKQUEUE_TRACER
bool "Trace workqueues"
select GENERIC_TRACER
obj-$(CONFIG_NOP_TRACER) += trace_nop.o
obj-$(CONFIG_STACK_TRACER) += trace_stack.o
obj-$(CONFIG_MMIOTRACE) += trace_mmiotrace.o
-obj-$(CONFIG_BOOT_TRACER) += trace_boot.o
obj-$(CONFIG_FUNCTION_GRAPH_TRACER) += trace_functions_graph.o
obj-$(CONFIG_TRACE_BRANCH_PROFILING) += trace_branch.o
-obj-$(CONFIG_KMEMTRACE) += kmemtrace.o
obj-$(CONFIG_WORKQUEUE_TRACER) += trace_workqueue.o
obj-$(CONFIG_BLK_DEV_IO_TRACE) += blktrace.o
ifeq ($(CONFIG_BLOCK),y)
+++ /dev/null
-/*
- * Memory allocator tracing
- *
- * Copyright (C) 2008 Eduard - Gabriel Munteanu
- * Copyright (C) 2008 Pekka Enberg <penberg@cs.helsinki.fi>
- * Copyright (C) 2008 Frederic Weisbecker <fweisbec@gmail.com>
- */
-
-#include <linux/tracepoint.h>
-#include <linux/seq_file.h>
-#include <linux/debugfs.h>
-#include <linux/dcache.h>
-#include <linux/fs.h>
-
-#include <linux/kmemtrace.h>
-
-#include "trace_output.h"
-#include "trace.h"
-
-/* Select an alternative, minimalistic output than the original one */
-#define TRACE_KMEM_OPT_MINIMAL 0x1
-
-static struct tracer_opt kmem_opts[] = {
- /* Default disable the minimalistic output */
- { TRACER_OPT(kmem_minimalistic, TRACE_KMEM_OPT_MINIMAL) },
- { }
-};
-
-static struct tracer_flags kmem_tracer_flags = {
- .val = 0,
- .opts = kmem_opts
-};
-
-static struct trace_array *kmemtrace_array;
-
-/* Trace allocations */
-static inline void kmemtrace_alloc(enum kmemtrace_type_id type_id,
- unsigned long call_site,
- const void *ptr,
- size_t bytes_req,
- size_t bytes_alloc,
- gfp_t gfp_flags,
- int node)
-{
- struct ftrace_event_call *call = &event_kmem_alloc;
- struct trace_array *tr = kmemtrace_array;
- struct kmemtrace_alloc_entry *entry;
- struct ring_buffer_event *event;
-
- event = ring_buffer_lock_reserve(tr->buffer, sizeof(*entry));
- if (!event)
- return;
-
- entry = ring_buffer_event_data(event);
- tracing_generic_entry_update(&entry->ent, 0, 0);
-
- entry->ent.type = TRACE_KMEM_ALLOC;
- entry->type_id = type_id;
- entry->call_site = call_site;
- entry->ptr = ptr;
- entry->bytes_req = bytes_req;
- entry->bytes_alloc = bytes_alloc;
- entry->gfp_flags = gfp_flags;
- entry->node = node;
-
- if (!filter_check_discard(call, entry, tr->buffer, event))
- ring_buffer_unlock_commit(tr->buffer, event);
-
- trace_wake_up();
-}
-
-static inline void kmemtrace_free(enum kmemtrace_type_id type_id,
- unsigned long call_site,
- const void *ptr)
-{
- struct ftrace_event_call *call = &event_kmem_free;
- struct trace_array *tr = kmemtrace_array;
- struct kmemtrace_free_entry *entry;
- struct ring_buffer_event *event;
-
- event = ring_buffer_lock_reserve(tr->buffer, sizeof(*entry));
- if (!event)
- return;
- entry = ring_buffer_event_data(event);
- tracing_generic_entry_update(&entry->ent, 0, 0);
-
- entry->ent.type = TRACE_KMEM_FREE;
- entry->type_id = type_id;
- entry->call_site = call_site;
- entry->ptr = ptr;
-
- if (!filter_check_discard(call, entry, tr->buffer, event))
- ring_buffer_unlock_commit(tr->buffer, event);
-
- trace_wake_up();
-}
-
-static void kmemtrace_kmalloc(void *ignore,
- unsigned long call_site,
- const void *ptr,
- size_t bytes_req,
- size_t bytes_alloc,
- gfp_t gfp_flags)
-{
- kmemtrace_alloc(KMEMTRACE_TYPE_KMALLOC, call_site, ptr,
- bytes_req, bytes_alloc, gfp_flags, -1);
-}
-
-static void kmemtrace_kmem_cache_alloc(void *ignore,
- unsigned long call_site,
- const void *ptr,
- size_t bytes_req,
- size_t bytes_alloc,
- gfp_t gfp_flags)
-{
- kmemtrace_alloc(KMEMTRACE_TYPE_CACHE, call_site, ptr,
- bytes_req, bytes_alloc, gfp_flags, -1);
-}
-
-static void kmemtrace_kmalloc_node(void *ignore,
- unsigned long call_site,
- const void *ptr,
- size_t bytes_req,
- size_t bytes_alloc,
- gfp_t gfp_flags,
- int node)
-{
- kmemtrace_alloc(KMEMTRACE_TYPE_KMALLOC, call_site, ptr,
- bytes_req, bytes_alloc, gfp_flags, node);
-}
-
-static void kmemtrace_kmem_cache_alloc_node(void *ignore,
- unsigned long call_site,
- const void *ptr,
- size_t bytes_req,
- size_t bytes_alloc,
- gfp_t gfp_flags,
- int node)
-{
- kmemtrace_alloc(KMEMTRACE_TYPE_CACHE, call_site, ptr,
- bytes_req, bytes_alloc, gfp_flags, node);
-}
-
-static void
-kmemtrace_kfree(void *ignore, unsigned long call_site, const void *ptr)
-{
- kmemtrace_free(KMEMTRACE_TYPE_KMALLOC, call_site, ptr);
-}
-
-static void kmemtrace_kmem_cache_free(void *ignore,
- unsigned long call_site, const void *ptr)
-{
- kmemtrace_free(KMEMTRACE_TYPE_CACHE, call_site, ptr);
-}
-
-static int kmemtrace_start_probes(void)
-{
- int err;
-
- err = register_trace_kmalloc(kmemtrace_kmalloc, NULL);
- if (err)
- return err;
- err = register_trace_kmem_cache_alloc(kmemtrace_kmem_cache_alloc, NULL);
- if (err)
- return err;
- err = register_trace_kmalloc_node(kmemtrace_kmalloc_node, NULL);
- if (err)
- return err;
- err = register_trace_kmem_cache_alloc_node(kmemtrace_kmem_cache_alloc_node, NULL);
- if (err)
- return err;
- err = register_trace_kfree(kmemtrace_kfree, NULL);
- if (err)
- return err;
- err = register_trace_kmem_cache_free(kmemtrace_kmem_cache_free, NULL);
-
- return err;
-}
-
-static void kmemtrace_stop_probes(void)
-{
- unregister_trace_kmalloc(kmemtrace_kmalloc, NULL);
- unregister_trace_kmem_cache_alloc(kmemtrace_kmem_cache_alloc, NULL);
- unregister_trace_kmalloc_node(kmemtrace_kmalloc_node, NULL);
- unregister_trace_kmem_cache_alloc_node(kmemtrace_kmem_cache_alloc_node, NULL);
- unregister_trace_kfree(kmemtrace_kfree, NULL);
- unregister_trace_kmem_cache_free(kmemtrace_kmem_cache_free, NULL);
-}
-
-static int kmem_trace_init(struct trace_array *tr)
-{
- kmemtrace_array = tr;
-
- tracing_reset_online_cpus(tr);
-
- kmemtrace_start_probes();
-
- return 0;
-}
-
-static void kmem_trace_reset(struct trace_array *tr)
-{
- kmemtrace_stop_probes();
-}
-
-static void kmemtrace_headers(struct seq_file *s)
-{
- /* Don't need headers for the original kmemtrace output */
- if (!(kmem_tracer_flags.val & TRACE_KMEM_OPT_MINIMAL))
- return;
-
- seq_printf(s, "#\n");
- seq_printf(s, "# ALLOC TYPE REQ GIVEN FLAGS "
- " POINTER NODE CALLER\n");
- seq_printf(s, "# FREE | | | | "
- " | | | |\n");
- seq_printf(s, "# |\n\n");
-}
-
-/*
- * The following functions give the original output from kmemtrace,
- * plus the origin CPU, since reordering occurs in-kernel now.
- */
-
-#define KMEMTRACE_USER_ALLOC 0
-#define KMEMTRACE_USER_FREE 1
-
-struct kmemtrace_user_event {
- u8 event_id;
- u8 type_id;
- u16 event_size;
- u32 cpu;
- u64 timestamp;
- unsigned long call_site;
- unsigned long ptr;
-};
-
-struct kmemtrace_user_event_alloc {
- size_t bytes_req;
- size_t bytes_alloc;
- unsigned gfp_flags;
- int node;
-};
-
-static enum print_line_t
-kmemtrace_print_alloc(struct trace_iterator *iter, int flags,
- struct trace_event *event)
-{
- struct trace_seq *s = &iter->seq;
- struct kmemtrace_alloc_entry *entry;
- int ret;
-
- trace_assign_type(entry, iter->ent);
-
- ret = trace_seq_printf(s, "type_id %d call_site %pF ptr %lu "
- "bytes_req %lu bytes_alloc %lu gfp_flags %lu node %d\n",
- entry->type_id, (void *)entry->call_site, (unsigned long)entry->ptr,
- (unsigned long)entry->bytes_req, (unsigned long)entry->bytes_alloc,
- (unsigned long)entry->gfp_flags, entry->node);
-
- if (!ret)
- return TRACE_TYPE_PARTIAL_LINE;
- return TRACE_TYPE_HANDLED;
-}
-
-static enum print_line_t
-kmemtrace_print_free(struct trace_iterator *iter, int flags,
- struct trace_event *event)
-{
- struct trace_seq *s = &iter->seq;
- struct kmemtrace_free_entry *entry;
- int ret;
-
- trace_assign_type(entry, iter->ent);
-
- ret = trace_seq_printf(s, "type_id %d call_site %pF ptr %lu\n",
- entry->type_id, (void *)entry->call_site,
- (unsigned long)entry->ptr);
-
- if (!ret)
- return TRACE_TYPE_PARTIAL_LINE;
- return TRACE_TYPE_HANDLED;
-}
-
-static enum print_line_t
-kmemtrace_print_alloc_user(struct trace_iterator *iter, int flags,
- struct trace_event *event)
-{
- struct trace_seq *s = &iter->seq;
- struct kmemtrace_alloc_entry *entry;
- struct kmemtrace_user_event *ev;
- struct kmemtrace_user_event_alloc *ev_alloc;
-
- trace_assign_type(entry, iter->ent);
-
- ev = trace_seq_reserve(s, sizeof(*ev));
- if (!ev)
- return TRACE_TYPE_PARTIAL_LINE;
-
- ev->event_id = KMEMTRACE_USER_ALLOC;
- ev->type_id = entry->type_id;
- ev->event_size = sizeof(*ev) + sizeof(*ev_alloc);
- ev->cpu = iter->cpu;
- ev->timestamp = iter->ts;
- ev->call_site = entry->call_site;
- ev->ptr = (unsigned long)entry->ptr;
-
- ev_alloc = trace_seq_reserve(s, sizeof(*ev_alloc));
- if (!ev_alloc)
- return TRACE_TYPE_PARTIAL_LINE;
-
- ev_alloc->bytes_req = entry->bytes_req;
- ev_alloc->bytes_alloc = entry->bytes_alloc;
- ev_alloc->gfp_flags = entry->gfp_flags;
- ev_alloc->node = entry->node;
-
- return TRACE_TYPE_HANDLED;
-}
-
-static enum print_line_t
-kmemtrace_print_free_user(struct trace_iterator *iter, int flags,
- struct trace_event *event)
-{
- struct trace_seq *s = &iter->seq;
- struct kmemtrace_free_entry *entry;
- struct kmemtrace_user_event *ev;
-
- trace_assign_type(entry, iter->ent);
-
- ev = trace_seq_reserve(s, sizeof(*ev));
- if (!ev)
- return TRACE_TYPE_PARTIAL_LINE;
-
- ev->event_id = KMEMTRACE_USER_FREE;
- ev->type_id = entry->type_id;
- ev->event_size = sizeof(*ev);
- ev->cpu = iter->cpu;
- ev->timestamp = iter->ts;
- ev->call_site = entry->call_site;
- ev->ptr = (unsigned long)entry->ptr;
-
- return TRACE_TYPE_HANDLED;
-}
-
-/* The two other following provide a more minimalistic output */
-static enum print_line_t
-kmemtrace_print_alloc_compress(struct trace_iterator *iter)
-{
- struct kmemtrace_alloc_entry *entry;
- struct trace_seq *s = &iter->seq;
- int ret;
-
- trace_assign_type(entry, iter->ent);
-
- /* Alloc entry */
- ret = trace_seq_printf(s, " + ");
- if (!ret)
- return TRACE_TYPE_PARTIAL_LINE;
-
- /* Type */
- switch (entry->type_id) {
- case KMEMTRACE_TYPE_KMALLOC:
- ret = trace_seq_printf(s, "K ");
- break;
- case KMEMTRACE_TYPE_CACHE:
- ret = trace_seq_printf(s, "C ");
- break;
- case KMEMTRACE_TYPE_PAGES:
- ret = trace_seq_printf(s, "P ");
- break;
- default:
- ret = trace_seq_printf(s, "? ");
- }
-
- if (!ret)
- return TRACE_TYPE_PARTIAL_LINE;
-
- /* Requested */
- ret = trace_seq_printf(s, "%4zu ", entry->bytes_req);
- if (!ret)
- return TRACE_TYPE_PARTIAL_LINE;
-
- /* Allocated */
- ret = trace_seq_printf(s, "%4zu ", entry->bytes_alloc);
- if (!ret)
- return TRACE_TYPE_PARTIAL_LINE;
-
- /* Flags
- * TODO: would be better to see the name of the GFP flag names
- */
- ret = trace_seq_printf(s, "%08x ", entry->gfp_flags);
- if (!ret)
- return TRACE_TYPE_PARTIAL_LINE;
-
- /* Pointer to allocated */
- ret = trace_seq_printf(s, "0x%tx ", (ptrdiff_t)entry->ptr);
- if (!ret)
- return TRACE_TYPE_PARTIAL_LINE;
-
- /* Node and call site*/
- ret = trace_seq_printf(s, "%4d %pf\n", entry->node,
- (void *)entry->call_site);
- if (!ret)
- return TRACE_TYPE_PARTIAL_LINE;
-
- return TRACE_TYPE_HANDLED;
-}
-
-static enum print_line_t
-kmemtrace_print_free_compress(struct trace_iterator *iter)
-{
- struct kmemtrace_free_entry *entry;
- struct trace_seq *s = &iter->seq;
- int ret;
-
- trace_assign_type(entry, iter->ent);
-
- /* Free entry */
- ret = trace_seq_printf(s, " - ");
- if (!ret)
- return TRACE_TYPE_PARTIAL_LINE;
-
- /* Type */
- switch (entry->type_id) {
- case KMEMTRACE_TYPE_KMALLOC:
- ret = trace_seq_printf(s, "K ");
- break;
- case KMEMTRACE_TYPE_CACHE:
- ret = trace_seq_printf(s, "C ");
- break;
- case KMEMTRACE_TYPE_PAGES:
- ret = trace_seq_printf(s, "P ");
- break;
- default:
- ret = trace_seq_printf(s, "? ");
- }
-
- if (!ret)
- return TRACE_TYPE_PARTIAL_LINE;
-
- /* Skip requested/allocated/flags */
- ret = trace_seq_printf(s, " ");
- if (!ret)
- return TRACE_TYPE_PARTIAL_LINE;
-
- /* Pointer to allocated */
- ret = trace_seq_printf(s, "0x%tx ", (ptrdiff_t)entry->ptr);
- if (!ret)
- return TRACE_TYPE_PARTIAL_LINE;
-
- /* Skip node and print call site*/
- ret = trace_seq_printf(s, " %pf\n", (void *)entry->call_site);
- if (!ret)
- return TRACE_TYPE_PARTIAL_LINE;
-
- return TRACE_TYPE_HANDLED;
-}
-
-static enum print_line_t kmemtrace_print_line(struct trace_iterator *iter)
-{
- struct trace_entry *entry = iter->ent;
-
- if (!(kmem_tracer_flags.val & TRACE_KMEM_OPT_MINIMAL))
- return TRACE_TYPE_UNHANDLED;
-
- switch (entry->type) {
- case TRACE_KMEM_ALLOC:
- return kmemtrace_print_alloc_compress(iter);
- case TRACE_KMEM_FREE:
- return kmemtrace_print_free_compress(iter);
- default:
- return TRACE_TYPE_UNHANDLED;
- }
-}
-
-static struct trace_event_functions kmem_trace_alloc_funcs = {
- .trace = kmemtrace_print_alloc,
- .binary = kmemtrace_print_alloc_user,
-};
-
-static struct trace_event kmem_trace_alloc = {
- .type = TRACE_KMEM_ALLOC,
- .funcs = &kmem_trace_alloc_funcs,
-};
-
-static struct trace_event_functions kmem_trace_free_funcs = {
- .trace = kmemtrace_print_free,
- .binary = kmemtrace_print_free_user,
-};
-
-static struct trace_event kmem_trace_free = {
- .type = TRACE_KMEM_FREE,
- .funcs = &kmem_trace_free_funcs,
-};
-
-static struct tracer kmem_tracer __read_mostly = {
- .name = "kmemtrace",
- .init = kmem_trace_init,
- .reset = kmem_trace_reset,
- .print_line = kmemtrace_print_line,
- .print_header = kmemtrace_headers,
- .flags = &kmem_tracer_flags
-};
-
-void kmemtrace_init(void)
-{
- /* earliest opportunity to start kmem tracing */
-}
-
-static int __init init_kmem_tracer(void)
-{
- if (!register_ftrace_event(&kmem_trace_alloc)) {
- pr_warning("Warning: could not register kmem events\n");
- return 1;
- }
-
- if (!register_ftrace_event(&kmem_trace_free)) {
- pr_warning("Warning: could not register kmem events\n");
- return 1;
- }
-
- if (register_tracer(&kmem_tracer) != 0) {
- pr_warning("Warning: could not register the kmem tracer\n");
- return 1;
- }
-
- return 0;
-}
-device_initcall(init_kmem_tracer);
register_tracer(&nop_trace);
current_trace = &nop_trace;
-#ifdef CONFIG_BOOT_TRACER
- register_tracer(&boot_tracer);
-#endif
/* All seems OK, enable tracing */
tracing_disabled = 0;
#include <linux/mmiotrace.h>
#include <linux/tracepoint.h>
#include <linux/ftrace.h>
-#include <trace/boot.h>
-#include <linux/kmemtrace.h>
#include <linux/hw_breakpoint.h>
-
#include <linux/trace_seq.h>
#include <linux/ftrace_event.h>
TRACE_MMIO_RW,
TRACE_MMIO_MAP,
TRACE_BRANCH,
- TRACE_BOOT_CALL,
- TRACE_BOOT_RET,
TRACE_GRAPH_RET,
TRACE_GRAPH_ENT,
TRACE_USER_STACK,
- TRACE_KMEM_ALLOC,
- TRACE_KMEM_FREE,
TRACE_BLK,
TRACE_KSYM,
__TRACE_LAST_TYPE,
};
-enum kmemtrace_type_id {
- KMEMTRACE_TYPE_KMALLOC = 0, /* kmalloc() or kfree(). */
- KMEMTRACE_TYPE_CACHE, /* kmem_cache_*(). */
- KMEMTRACE_TYPE_PAGES, /* __get_free_pages() and friends. */
-};
-
-extern struct tracer boot_tracer;
#undef __field
#define __field(type, item) type item;
TRACE_MMIO_RW); \
IF_ASSIGN(var, ent, struct trace_mmiotrace_map, \
TRACE_MMIO_MAP); \
- IF_ASSIGN(var, ent, struct trace_boot_call, TRACE_BOOT_CALL);\
- IF_ASSIGN(var, ent, struct trace_boot_ret, TRACE_BOOT_RET);\
IF_ASSIGN(var, ent, struct trace_branch, TRACE_BRANCH); \
IF_ASSIGN(var, ent, struct ftrace_graph_ent_entry, \
TRACE_GRAPH_ENT); \
IF_ASSIGN(var, ent, struct ftrace_graph_ret_entry, \
TRACE_GRAPH_RET); \
- IF_ASSIGN(var, ent, struct kmemtrace_alloc_entry, \
- TRACE_KMEM_ALLOC); \
- IF_ASSIGN(var, ent, struct kmemtrace_free_entry, \
- TRACE_KMEM_FREE); \
IF_ASSIGN(var, ent, struct ksym_trace_entry, TRACE_KSYM);\
__ftrace_bad_type(); \
} while (0)
+++ /dev/null
-/*
- * ring buffer based initcalls tracer
- *
- * Copyright (C) 2008 Frederic Weisbecker <fweisbec@gmail.com>
- *
- */
-
-#include <linux/init.h>
-#include <linux/debugfs.h>
-#include <linux/ftrace.h>
-#include <linux/kallsyms.h>
-#include <linux/time.h>
-
-#include "trace.h"
-#include "trace_output.h"
-
-static struct trace_array *boot_trace;
-static bool pre_initcalls_finished;
-
-/* Tells the boot tracer that the pre_smp_initcalls are finished.
- * So we are ready .
- * It doesn't enable sched events tracing however.
- * You have to call enable_boot_trace to do so.
- */
-void start_boot_trace(void)
-{
- pre_initcalls_finished = true;
-}
-
-void enable_boot_trace(void)
-{
- if (boot_trace && pre_initcalls_finished)
- tracing_start_sched_switch_record();
-}
-
-void disable_boot_trace(void)
-{
- if (boot_trace && pre_initcalls_finished)
- tracing_stop_sched_switch_record();
-}
-
-static int boot_trace_init(struct trace_array *tr)
-{
- boot_trace = tr;
-
- if (!tr)
- return 0;
-
- tracing_reset_online_cpus(tr);
-
- tracing_sched_switch_assign_trace(tr);
- return 0;
-}
-
-static enum print_line_t
-initcall_call_print_line(struct trace_iterator *iter)
-{
- struct trace_entry *entry = iter->ent;
- struct trace_seq *s = &iter->seq;
- struct trace_boot_call *field;
- struct boot_trace_call *call;
- u64 ts;
- unsigned long nsec_rem;
- int ret;
-
- trace_assign_type(field, entry);
- call = &field->boot_call;
- ts = iter->ts;
- nsec_rem = do_div(ts, NSEC_PER_SEC);
-
- ret = trace_seq_printf(s, "[%5ld.%09ld] calling %s @ %i\n",
- (unsigned long)ts, nsec_rem, call->func, call->caller);
-
- if (!ret)
- return TRACE_TYPE_PARTIAL_LINE;
- else
- return TRACE_TYPE_HANDLED;
-}
-
-static enum print_line_t
-initcall_ret_print_line(struct trace_iterator *iter)
-{
- struct trace_entry *entry = iter->ent;
- struct trace_seq *s = &iter->seq;
- struct trace_boot_ret *field;
- struct boot_trace_ret *init_ret;
- u64 ts;
- unsigned long nsec_rem;
- int ret;
-
- trace_assign_type(field, entry);
- init_ret = &field->boot_ret;
- ts = iter->ts;
- nsec_rem = do_div(ts, NSEC_PER_SEC);
-
- ret = trace_seq_printf(s, "[%5ld.%09ld] initcall %s "
- "returned %d after %llu msecs\n",
- (unsigned long) ts,
- nsec_rem,
- init_ret->func, init_ret->result, init_ret->duration);
-
- if (!ret)
- return TRACE_TYPE_PARTIAL_LINE;
- else
- return TRACE_TYPE_HANDLED;
-}
-
-static enum print_line_t initcall_print_line(struct trace_iterator *iter)
-{
- struct trace_entry *entry = iter->ent;
-
- switch (entry->type) {
- case TRACE_BOOT_CALL:
- return initcall_call_print_line(iter);
- case TRACE_BOOT_RET:
- return initcall_ret_print_line(iter);
- default:
- return TRACE_TYPE_UNHANDLED;
- }
-}
-
-struct tracer boot_tracer __read_mostly =
-{
- .name = "initcall",
- .init = boot_trace_init,
- .reset = tracing_reset_online_cpus,
- .print_line = initcall_print_line,
-};
-
-void trace_boot_call(struct boot_trace_call *bt, initcall_t fn)
-{
- struct ftrace_event_call *call = &event_boot_call;
- struct ring_buffer_event *event;
- struct ring_buffer *buffer;
- struct trace_boot_call *entry;
- struct trace_array *tr = boot_trace;
-
- if (!tr || !pre_initcalls_finished)
- return;
-
- /* Get its name now since this function could
- * disappear because it is in the .init section.
- */
- sprint_symbol(bt->func, (unsigned long)fn);
- preempt_disable();
-
- buffer = tr->buffer;
- event = trace_buffer_lock_reserve(buffer, TRACE_BOOT_CALL,
- sizeof(*entry), 0, 0);
- if (!event)
- goto out;
- entry = ring_buffer_event_data(event);
- entry->boot_call = *bt;
- if (!filter_check_discard(call, entry, buffer, event))
- trace_buffer_unlock_commit(buffer, event, 0, 0);
- out:
- preempt_enable();
-}
-
-void trace_boot_ret(struct boot_trace_ret *bt, initcall_t fn)
-{
- struct ftrace_event_call *call = &event_boot_ret;
- struct ring_buffer_event *event;
- struct ring_buffer *buffer;
- struct trace_boot_ret *entry;
- struct trace_array *tr = boot_trace;
-
- if (!tr || !pre_initcalls_finished)
- return;
-
- sprint_symbol(bt->func, (unsigned long)fn);
- preempt_disable();
-
- buffer = tr->buffer;
- event = trace_buffer_lock_reserve(buffer, TRACE_BOOT_RET,
- sizeof(*entry), 0, 0);
- if (!event)
- goto out;
- entry = ring_buffer_event_data(event);
- entry->boot_ret = *bt;
- if (!filter_check_discard(call, entry, buffer, event))
- trace_buffer_unlock_commit(buffer, event, 0, 0);
- out:
- preempt_enable();
-}
__entry->map_id, __entry->opcode)
);
-FTRACE_ENTRY(boot_call, trace_boot_call,
-
- TRACE_BOOT_CALL,
-
- F_STRUCT(
- __field_struct( struct boot_trace_call, boot_call )
- __field_desc( pid_t, boot_call, caller )
- __array_desc( char, boot_call, func, KSYM_SYMBOL_LEN)
- ),
-
- F_printk("%d %s", __entry->caller, __entry->func)
-);
-
-FTRACE_ENTRY(boot_ret, trace_boot_ret,
-
- TRACE_BOOT_RET,
-
- F_STRUCT(
- __field_struct( struct boot_trace_ret, boot_ret )
- __array_desc( char, boot_ret, func, KSYM_SYMBOL_LEN)
- __field_desc( int, boot_ret, result )
- __field_desc( unsigned long, boot_ret, duration )
- ),
-
- F_printk("%s %d %lx",
- __entry->func, __entry->result, __entry->duration)
-);
#define TRACE_FUNC_SIZE 30
#define TRACE_FILE_SIZE 20
__entry->func, __entry->file, __entry->correct)
);
-FTRACE_ENTRY(kmem_alloc, kmemtrace_alloc_entry,
-
- TRACE_KMEM_ALLOC,
-
- F_STRUCT(
- __field( enum kmemtrace_type_id, type_id )
- __field( unsigned long, call_site )
- __field( const void *, ptr )
- __field( size_t, bytes_req )
- __field( size_t, bytes_alloc )
- __field( gfp_t, gfp_flags )
- __field( int, node )
- ),
-
- F_printk("type:%u call_site:%lx ptr:%p req:%zi alloc:%zi"
- " flags:%x node:%d",
- __entry->type_id, __entry->call_site, __entry->ptr,
- __entry->bytes_req, __entry->bytes_alloc,
- __entry->gfp_flags, __entry->node)
-);
-
-FTRACE_ENTRY(kmem_free, kmemtrace_free_entry,
-
- TRACE_KMEM_FREE,
-
- F_STRUCT(
- __field( enum kmemtrace_type_id, type_id )
- __field( unsigned long, call_site )
- __field( const void *, ptr )
- ),
-
- F_printk("type:%u call_site:%lx ptr:%p",
- __entry->type_id, __entry->call_site, __entry->ptr)
-);
-
FTRACE_ENTRY(ksym_trace, ksym_trace_entry,
TRACE_KSYM,
#include <linux/kprobes.h>
#include "trace.h"
-EXPORT_SYMBOL_GPL(perf_arch_fetch_caller_regs);
-
static char *perf_trace_buf[4];
/*
*/
static DEFINE_PER_CPU(struct hrtimer, stack_trace_hrtimer);
-struct stack_frame {
+struct stack_frame_user {
const void __user *next_fp;
unsigned long return_address;
};
-static int copy_stack_frame(const void __user *fp, struct stack_frame *frame)
+static int
+copy_stack_frame(const void __user *fp, struct stack_frame_user *frame)
{
int ret;
static void timer_notify(struct pt_regs *regs, int cpu)
{
struct trace_array_cpu *data;
- struct stack_frame frame;
+ struct stack_frame_user frame;
struct trace_array *tr;
const void __user *fp;
int is_user;
#include <linux/cpu.h>
#include <linux/sysctl.h>
#include <linux/module.h>
-#include <linux/kmemtrace.h>
#include <linux/rcupdate.h>
#include <linux/string.h>
#include <linux/uaccess.h>
#include <linux/module.h>
#include <linux/rcupdate.h>
#include <linux/list.h>
-#include <linux/kmemtrace.h>
#include <linux/kmemleak.h>
+
+#include <trace/events/kmem.h>
+
#include <asm/atomic.h>
/*
#include <linux/slab.h>
#include <linux/proc_fs.h>
#include <linux/seq_file.h>
-#include <linux/kmemtrace.h>
#include <linux/kmemcheck.h>
#include <linux/cpu.h>
#include <linux/cpuset.h>
git://bbs.cooldavid.org / net-next-2.6.git / commitdiff