diff options
| author | Wu Fengguang <fengguang.wu@intel.com> | 2009-06-16 15:33:05 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2009-06-16 19:47:44 -0700 |
| commit | 6fe6b7e35785e3232ffe7f81d3893f1316710a02 (patch) | |
| tree | 6f47c03735504d8aab8f7b048465b87cc5b15861 /include | |
| parent | 608e8e66a154cbc3d591a59dcebfd9cbc9e3431a (diff) | |
| download | lwn-6fe6b7e35785e3232ffe7f81d3893f1316710a02.tar.gz lwn-6fe6b7e35785e3232ffe7f81d3893f1316710a02.zip | |
vmscan: report vm_flags in page_referenced()
Collect vma->vm_flags of the VMAs that actually referenced the page.
This is preparing for more informed reclaim heuristics, eg. to protect
executable file pages more aggressively. For now only the VM_EXEC bit
will be used by the caller.
Thanks to Johannes, Peter and Minchan for all the good tips.
Acked-by: Peter Zijlstra <peterz@infradead.org>
Reviewed-by: Rik van Riel <riel@redhat.com>
Reviewed-by: Minchan Kim <minchan.kim@gmail.com>
Reviewed-by: Johannes Weiner <hannes@cmpxchg.org>
Signed-off-by: Wu Fengguang <fengguang.wu@intel.com>
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/rmap.h | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/include/linux/rmap.h b/include/linux/rmap.h index 619379a1dd98..216d024f830d 100644 --- a/include/linux/rmap.h +++ b/include/linux/rmap.h @@ -83,7 +83,8 @@ static inline void page_dup_rmap(struct page *page, struct vm_area_struct *vma, /* * Called from mm/vmscan.c to handle paging out */ -int page_referenced(struct page *, int is_locked, struct mem_cgroup *cnt); +int page_referenced(struct page *, int is_locked, + struct mem_cgroup *cnt, unsigned long *vm_flags); int try_to_unmap(struct page *, int ignore_refs); /* @@ -117,7 +118,7 @@ int try_to_munlock(struct page *); #define anon_vma_prepare(vma) (0) #define anon_vma_link(vma) do {} while (0) -#define page_referenced(page,l,cnt) TestClearPageReferenced(page) +#define page_referenced(page, locked, cnt, flags) TestClearPageReferenced(page) #define try_to_unmap(page, refs) SWAP_FAIL static inline int page_mkclean(struct page *page) |