diff options
| author | David Gibson <david@gibson.dropbear.id.au> | 2005-08-11 16:55:21 +1000 |
|---|---|---|
| committer | Paul Mackerras <paulus@samba.org> | 2005-08-29 10:53:38 +1000 |
| commit | c594adad5653491813959277fb87a2fef54c4e05 (patch) | |
| tree | baefdce10a0b490017b0a5acbe9dbeb8cb14c003 /arch/ppc64/kernel | |
| parent | 9a5573e378c5c8976c6000a7643b52e2a0481688 (diff) | |
[PATCH] Dynamic hugepage addresses for ppc64
Paulus, I think this is now a reasonable candidate for the post-2.6.13
queue.
Relax address restrictions for hugepages on ppc64
Presently, 64-bit applications on ppc64 may only use hugepages in the
address region from 1-1.5T. Furthermore, if hugepages are enabled in
the kernel config, they may only use hugepages and never normal pages
in this area. This patch relaxes this restriction, allowing any
address to be used with hugepages, but with a 1TB granularity. That
is if you map a hugepage anywhere in the region 1TB-2TB, that entire
area will be reserved exclusively for hugepages for the remainder of
the process's lifetime. This works analagously to hugepages in 32-bit
applications, where hugepages can be mapped anywhere, but with 256MB
(mmu segment) granularity.
This patch applies on top of the four level pagetable patch
(http://patchwork.ozlabs.org/linuxppc64/patch?id=1936).
Signed-off-by: David Gibson <dwg@au1.ibm.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
Diffstat (limited to 'arch/ppc64/kernel')
| -rw-r--r-- | arch/ppc64/kernel/asm-offsets.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/arch/ppc64/kernel/asm-offsets.c b/arch/ppc64/kernel/asm-offsets.c index abb9e5b5da0..17e35d0fed0 100644 --- a/arch/ppc64/kernel/asm-offsets.c +++ b/arch/ppc64/kernel/asm-offsets.c @@ -94,7 +94,8 @@ int main(void) DEFINE(PACASLBCACHEPTR, offsetof(struct paca_struct, slb_cache_ptr)); DEFINE(PACACONTEXTID, offsetof(struct paca_struct, context.id)); #ifdef CONFIG_HUGETLB_PAGE - DEFINE(PACAHTLBSEGS, offsetof(struct paca_struct, context.htlb_segs)); + DEFINE(PACALOWHTLBAREAS, offsetof(struct paca_struct, context.low_htlb_areas)); + DEFINE(PACAHIGHHTLBAREAS, offsetof(struct paca_struct, context.high_htlb_areas)); #endif /* CONFIG_HUGETLB_PAGE */ DEFINE(PACADEFAULTDECR, offsetof(struct paca_struct, default_decr)); DEFINE(PACA_EXGEN, offsetof(struct paca_struct, exgen)); |