vmscan: report vm_flags in page_referenced()
authorWu Fengguang <fengguang.wu@intel.com>
Tue, 16 Jun 2009 22:33:05 +0000 (15:33 -0700)
committerLinus Torvalds <torvalds@linux-foundation.org>
Wed, 17 Jun 2009 02:47:44 +0000 (19:47 -0700)
commit6fe6b7e35785e3232ffe7f81d3893f1316710a02
tree6f47c03735504d8aab8f7b048465b87cc5b15861
parent608e8e66a154cbc3d591a59dcebfd9cbc9e3431a
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>
include/linux/rmap.h
mm/rmap.c
mm/vmscan.c