diff options
| author | Paul Jackson | 2006-03-24 03:16:04 -0800 |
|---|---|---|
| committer | Linus Torvalds | 2006-03-24 07:33:22 -0800 |
| commit | 44110fe385af23ca5eee8a6ad4ff55d50339097a (patch) | |
| tree | 50ed2bfe054b8e35968d8e4a5fbe95c8b3db843b | |
| parent | 825a46af5ac171f9f41f794a0a00165588ba1589 (diff) | |
[PATCH] cpuset memory spread page cache implementation and hooks
Change the page cache allocation calls to support cpuset memory spreading.
See the previous patch, cpuset_mem_spread, for an explanation of cpuset memory
spreading.
On systems without cpusets configured in the kernel, this is no change.
On systems with cpusets configured in the kernel, but the "memory_spread"
cpuset option not enabled for the current tasks cpuset, this adds a call to a
cpuset routine and failed bit test of the processor state flag PF_SPREAD_PAGE.
On tasks in cpusets with "memory_spread" enabled, this adds a call to a cpuset
routine that computes which of the tasks mems_allowed nodes should be
preferred for this allocation.
If memory spreading applies to a particular allocation, then any other NUMA
mempolicy does not apply.
Signed-off-by: Paul Jackson <pj@sgi.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
| -rw-r--r-- | include/linux/pagemap.h | 5 | ||||
| -rw-r--r-- | mm/filemap.c | 23 |
2 files changed, 28 insertions, 0 deletions
diff --git a/include/linux/pagemap.h b/include/linux/pagemap.h index ee700c6eb442..839f0b3c23aa 100644 --- a/include/linux/pagemap.h +++ b/include/linux/pagemap.h @@ -51,6 +51,10 @@ static inline void mapping_set_gfp_mask(struct address_space *m, gfp_t mask) #define page_cache_release(page) put_page(page) void release_pages(struct page **pages, int nr, int cold); +#ifdef CONFIG_NUMA +extern struct page *page_cache_alloc(struct address_space *x); +extern struct page *page_cache_alloc_cold(struct address_space *x); +#else static inline struct page *page_cache_alloc(struct address_space *x) { return alloc_pages(mapping_gfp_mask(x), 0); @@ -60,6 +64,7 @@ static inline struct page *page_cache_alloc_cold(struct address_space *x) { return alloc_pages(mapping_gfp_mask(x)|__GFP_COLD, 0); } +#endif typedef int filler_t(void *, struct page *); diff --git a/mm/filemap.c b/mm/filemap.c index e8f58f7dd7a5..d4ff48ec269e 100644 --- a/mm/filemap.c +++ b/mm/filemap.c @@ -29,6 +29,7 @@ #include <linux/blkdev.h> #include <linux/security.h> #include <linux/syscalls.h> +#include <linux/cpuset.h> #include "filemap.h" #include "internal.h" @@ -427,6 +428,28 @@ int add_to_page_cache_lru(struct page *page, struct address_space *mapping, return ret; } +#ifdef CONFIG_NUMA +struct page *page_cache_alloc(struct address_space *x) +{ + if (cpuset_do_page_mem_spread()) { + int n = cpuset_mem_spread_node(); + return alloc_pages_node(n, mapping_gfp_mask(x), 0); + } + return alloc_pages(mapping_gfp_mask(x), 0); +} +EXPORT_SYMBOL(page_cache_alloc); + +struct page *page_cache_alloc_cold(struct address_space *x) +{ + if (cpuset_do_page_mem_spread()) { + int n = cpuset_mem_spread_node(); + return alloc_pages_node(n, mapping_gfp_mask(x)|__GFP_COLD, 0); + } + return alloc_pages(mapping_gfp_mask(x)|__GFP_COLD, 0); +} +EXPORT_SYMBOL(page_cache_alloc_cold); +#endif + /* * In order to wait for pages to become available there must be * waitqueues associated with pages. By using a hash table of |