From 7d3f661e5757e84f1fb2e10093cfa2f7b057bc2f Mon Sep 17 00:00:00 2001 From: Martin Schwidefsky Date: Fri, 9 Apr 2010 13:43:02 +0200 Subject: [PATCH] [S390] increase default size of vmalloc area The default size of the vmalloc area is currently 1 GB. The memory resource controller uses about 10 MB of vmalloc space per gigabyte of memory. That turns a system with more than ~100 GB memory unbootable with the default vmalloc size. It costs us nothing to increase the default size to some more adequate value, e.g. 128 GB. Signed-off-by: Martin Schwidefsky --- arch/s390/include/asm/pgtable.h | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/arch/s390/include/asm/pgtable.h b/arch/s390/include/asm/pgtable.h index 9b5b9189c15..89a504c3f12 100644 --- a/arch/s390/include/asm/pgtable.h +++ b/arch/s390/include/asm/pgtable.h @@ -105,7 +105,7 @@ extern char empty_zero_page[PAGE_SIZE]; #ifndef __ASSEMBLY__ /* * The vmalloc area will always be on the topmost area of the kernel - * mapping. We reserve 96MB (31bit) / 1GB (64bit) for vmalloc, + * mapping. We reserve 96MB (31bit) / 128GB (64bit) for vmalloc, * which should be enough for any sane case. * By putting vmalloc at the top, we maximise the gap between physical * memory and vmalloc to catch misplaced memory accesses. As a side @@ -120,8 +120,8 @@ extern unsigned long VMALLOC_START; #define VMALLOC_END 0x7e000000UL #define VMEM_MAP_END 0x80000000UL #else /* __s390x__ */ -#define VMALLOC_SIZE (1UL << 30) -#define VMALLOC_END 0x3e040000000UL +#define VMALLOC_SIZE (128UL << 30) +#define VMALLOC_END 0x3e000000000UL #define VMEM_MAP_END 0x40000000000UL #endif /* __s390x__ */ -- 2.39.3