[PATCH] slab: implement /proc/slab_allocators

[net-next-2.6.git] / fs / proc / proc_misc.c

diff --git a/fs/proc/proc_misc.c b/fs/proc/proc_misc.c
index 826c131994c38008226a0bb1c3fa668c11d13403..1e9ea37d457e246fdc10c1dbfe63e14d443b759d 100644 (file)
--- a/fs/proc/proc_misc.c
+++ b/fs/proc/proc_misc.c
@@ -485,6 +485,40 @@ static struct file_operations proc_slabinfo_operations = {
        .llseek         = seq_lseek,
        .release        = seq_release,
 };
+
+#ifdef CONFIG_DEBUG_SLAB_LEAK
+extern struct seq_operations slabstats_op;
+static int slabstats_open(struct inode *inode, struct file *file)
+{
+       unsigned long *n = kzalloc(PAGE_SIZE, GFP_KERNEL);
+       int ret = -ENOMEM;
+       if (n) {
+               ret = seq_open(file, &slabstats_op);
+               if (!ret) {
+                       struct seq_file *m = file->private_data;
+                       *n = PAGE_SIZE / (2 * sizeof(unsigned long));
+                       m->private = n;
+                       n = NULL;
+               }
+               kfree(n);
+       }
+       return ret;
+}
+
+static int slabstats_release(struct inode *inode, struct file *file)
+{
+       struct seq_file *m = file->private_data;
+       kfree(m->private);
+       return seq_release(inode, file);
+}
+
+static struct file_operations proc_slabstats_operations = {
+       .open           = slabstats_open,
+       .read           = seq_read,
+       .llseek         = seq_lseek,
+       .release        = slabstats_release,
+};
+#endif
 #endif
 
 static int show_stat(struct seq_file *p, void *v)
@@ -744,6 +778,9 @@ void __init proc_misc_init(void)
        create_seq_entry("interrupts", 0, &proc_interrupts_operations);
 #ifdef CONFIG_SLAB
        create_seq_entry("slabinfo",S_IWUSR|S_IRUGO,&proc_slabinfo_operations);
+#ifdef CONFIG_DEBUG_SLAB_LEAK
+       create_seq_entry("slab_allocators", 0 ,&proc_slabstats_operations);
+#endif
 #endif
        create_seq_entry("buddyinfo",S_IRUGO, &fragmentation_file_operations);
        create_seq_entry("vmstat",S_IRUGO, &proc_vmstat_file_operations);