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authorMartin Schwidefsky <schwidefsky@de.ibm.com>2010-04-09 13:43:02 +0200
committerMartin Schwidefsky <sky@mschwide.boeblingen.de.ibm.com>2010-04-09 13:43:02 +0200
commit7d3f661e5757e84f1fb2e10093cfa2f7b057bc2f (patch)
tree20d4191cfd0d3bd1fe90fede4ebcbc6581d823e4 /arch/s390
parent6af7eea2aee57b869f34eba0a94ef122fe90fbfd (diff)
downloadop-kernel-dev-7d3f661e5757e84f1fb2e10093cfa2f7b057bc2f.zip
op-kernel-dev-7d3f661e5757e84f1fb2e10093cfa2f7b057bc2f.tar.gz
[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 <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch/s390')
-rw-r--r--arch/s390/include/asm/pgtable.h6
1 files changed, 3 insertions, 3 deletions
diff --git a/arch/s390/include/asm/pgtable.h b/arch/s390/include/asm/pgtable.h
index 9b5b918..89a504c 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__ */
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