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| author | Heiko Carstens <heiko.carstens@de.ibm.com> | 2006-12-04 15:40:56 +0100 |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2006-12-04 15:40:56 +0100 |
| commit | 8b62bc9642300471737bc3b77b2a4a2ead46dedb (patch) | |
| tree | 0e510eac55df04ad244b74149c1fd7b8cc75e5e4 /include/asm-s390 | |
| parent | ce26a8532fd062ccd3f3c589a4be269a2dc20f00 (diff) | |
| download | op-kernel-dev-8b62bc9642300471737bc3b77b2a4a2ead46dedb.zip op-kernel-dev-8b62bc9642300471737bc3b77b2a4a2ead46dedb.tar.gz | |
[S390] Memory detection fixes.
VMALLOC_END on 31bit should be 0x8000000UL instead of 0x7fffffffL.
The page mask which is used to make sure memory_end is on 4MB/2MB
boundary is wrong and not needed. Therefore remove it.
Make sure a vmalloc area does also exist and work on (future)
machines with 4TB and more memory.
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'include/asm-s390')
| -rw-r--r-- | include/asm-s390/pgtable.h | 15 |
1 files changed, 12 insertions, 3 deletions
diff --git a/include/asm-s390/pgtable.h b/include/asm-s390/pgtable.h index 36bb6da..2d968a6 100644 --- a/include/asm-s390/pgtable.h +++ b/include/asm-s390/pgtable.h @@ -110,13 +110,22 @@ extern char empty_zero_page[PAGE_SIZE]; #define VMALLOC_OFFSET (8*1024*1024) #define VMALLOC_START (((unsigned long) high_memory + VMALLOC_OFFSET) \ & ~(VMALLOC_OFFSET-1)) + +/* + * We need some free virtual space to be able to do vmalloc. + * VMALLOC_MIN_SIZE defines the minimum size of the vmalloc + * area. On a machine with 2GB memory we make sure that we + * have at least 128MB free space for vmalloc. On a machine + * with 4TB we make sure we have at least 1GB. + */ #ifndef __s390x__ -# define VMALLOC_END (0x7fffffffL) +#define VMALLOC_MIN_SIZE 0x8000000UL +#define VMALLOC_END 0x80000000UL #else /* __s390x__ */ -# define VMALLOC_END (0x40000000000L) +#define VMALLOC_MIN_SIZE 0x40000000UL +#define VMALLOC_END 0x40000000000UL #endif /* __s390x__ */ - /* * A 31 bit pagetable entry of S390 has following format: * | PFRA | | OS | |
