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| author | Wu Fengguang <fengguang.wu@intel.com> | 2011-05-24 17:12:25 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2011-05-25 08:39:25 -0700 |
| commit | 7b1de5868b124d8f399d8791ed30a9b679d64d4d (patch) | |
| tree | 3a7d5d7a6ccc3226648cb0e56387614b7066c3ff /include | |
| parent | 6d3163ce86dd386b4f7bda80241d7fea2bc0bb1d (diff) | |
| download | lwn-7b1de5868b124d8f399d8791ed30a9b679d64d4d.tar.gz lwn-7b1de5868b124d8f399d8791ed30a9b679d64d4d.zip | |
readahead: readahead page allocations are OK to fail
Pass __GFP_NORETRY|__GFP_NOWARN for readahead page allocations.
readahead page allocations are completely optional. They are OK to fail
and in particular shall not trigger OOM on themselves.
Reported-by: Dave Young <hidave.darkstar@gmail.com>
Reviewed-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Signed-off-by: Wu Fengguang <fengguang.wu@intel.com>
Reviewed-by: Minchan Kim <minchan.kim@gmail.com>
Reviewed-by: Pekka Enberg <penberg@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/pagemap.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/include/linux/pagemap.h b/include/linux/pagemap.h index ea268080380d..716875e53520 100644 --- a/include/linux/pagemap.h +++ b/include/linux/pagemap.h @@ -219,6 +219,12 @@ static inline struct page *page_cache_alloc_cold(struct address_space *x) return __page_cache_alloc(mapping_gfp_mask(x)|__GFP_COLD); } +static inline struct page *page_cache_alloc_readahead(struct address_space *x) +{ + return __page_cache_alloc(mapping_gfp_mask(x) | + __GFP_COLD | __GFP_NORETRY | __GFP_NOWARN); +} + typedef int filler_t(void *, struct page *); extern struct page * find_get_page(struct address_space *mapping, |