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authorChristoph Lameter <clameter@engr.sgi.com>2006-01-06 00:10:46 -0800
committerLinus Torvalds <torvalds@g5.osdl.org>2006-01-06 08:33:23 -0800
commit5da7ca86078964cbfe6c83efc1205904587706fe (patch)
treea64a7824e90b42d6fdd71e6cb652362beb8983a1 /include/linux/mempolicy.h
parent96df9333c94d7d5aeceb21f6c5e7ae8ff34753cf (diff)
downloadop-kernel-dev-5da7ca86078964cbfe6c83efc1205904587706fe.zip
op-kernel-dev-5da7ca86078964cbfe6c83efc1205904587706fe.tar.gz
[PATCH] Add NUMA policy support for huge pages.
The huge_zonelist() function in the memory policy layer provides an list of zones ordered by NUMA distance. The hugetlb layer will walk that list looking for a zone that has available huge pages but is also in the nodeset of the current cpuset. This patch does not contain the folding of find_or_alloc_huge_page() that was controversial in the earlier discussion. Signed-off-by: Christoph Lameter <clameter@sgi.com> Cc: Andi Kleen <ak@muc.de> Acked-by: William Lee Irwin III <wli@holomorphy.com> Cc: Adam Litke <agl@us.ibm.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'include/linux/mempolicy.h')
-rw-r--r--include/linux/mempolicy.h8
1 files changed, 8 insertions, 0 deletions
diff --git a/include/linux/mempolicy.h b/include/linux/mempolicy.h
index 8b67cf8..817db64 100644
--- a/include/linux/mempolicy.h
+++ b/include/linux/mempolicy.h
@@ -156,6 +156,8 @@ extern void numa_default_policy(void);
extern void numa_policy_init(void);
extern void numa_policy_rebind(const nodemask_t *old, const nodemask_t *new);
extern struct mempolicy default_policy;
+extern struct zonelist *huge_zonelist(struct vm_area_struct *vma,
+ unsigned long addr);
#else
@@ -232,6 +234,12 @@ static inline void numa_policy_rebind(const nodemask_t *old,
{
}
+static inline struct zonelist *huge_zonelist(struct vm_area_struct *vma,
+ unsigned long addr)
+{
+ return NODE_DATA(0)->node_zonelists + gfp_zone(GFP_HIGHUSER);
+}
+
#endif /* CONFIG_NUMA */
#endif /* __KERNEL__ */
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