diff options
Diffstat (limited to 'include/asm-s390/pgtable.h')
| -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 36bb6dacf008..2d968a69ed1f 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 | |