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| 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 /mm/vmscan.c | |
| 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 'mm/vmscan.c')
| -rw-r--r-- | mm/vmscan.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/mm/vmscan.c b/mm/vmscan.c index 52339dd7bf85..6be2068f61c8 100644 --- a/mm/vmscan.c +++ b/mm/vmscan.c @@ -577,6 +577,7 @@ static unsigned long shrink_page_list(struct list_head *page_list, struct pagevec freed_pvec; int pgactivate = 0; unsigned long nr_reclaimed = 0; + unsigned long vm_flags; cond_resched(); @@ -627,7 +628,8 @@ static unsigned long shrink_page_list(struct list_head *page_list, goto keep_locked; } - referenced = page_referenced(page, 1, sc->mem_cgroup); + referenced = page_referenced(page, 1, + sc->mem_cgroup, &vm_flags); /* In active use or really unfreeable? Activate it. */ if (sc->order <= PAGE_ALLOC_COSTLY_ORDER && referenced && page_mapping_inuse(page)) @@ -1208,6 +1210,7 @@ static void shrink_active_list(unsigned long nr_pages, struct zone *zone, { unsigned long pgmoved; unsigned long pgscanned; + unsigned long vm_flags; LIST_HEAD(l_hold); /* The pages which were snipped off */ LIST_HEAD(l_inactive); struct page *page; @@ -1248,7 +1251,7 @@ static void shrink_active_list(unsigned long nr_pages, struct zone *zone, /* page_referenced clears PageReferenced */ if (page_mapping_inuse(page) && - page_referenced(page, 0, sc->mem_cgroup)) + page_referenced(page, 0, sc->mem_cgroup, &vm_flags)) pgmoved++; list_add(&page->lru, &l_inactive); |