path: root/mm/swapfile.c
diff options
authorHugh Dickins <hugh@veritas.com>2005-10-29 18:16:05 -0700
committerLinus Torvalds <torvalds@g5.osdl.org>2005-10-29 21:40:38 -0700
commit4294621f41a85497019fae64341aa5351a1921b7 (patch)
treefdeb7eb44384a99d0679ffa6de5019bab0ea2166 /mm/swapfile.c
parent404351e67a9facb475abf1492245374a28d13e90 (diff)
[PATCH] mm: rss = file_rss + anon_rss
I was lazy when we added anon_rss, and chose to change as few places as possible. So currently each anonymous page has to be counted twice, in rss and in anon_rss. Which won't be so good if those are atomic counts in some configurations. Change that around: keep file_rss and anon_rss separately, and add them together (with get_mm_rss macro) when the total is needed - reading two atomics is much cheaper than updating two atomics. And update anon_rss upfront, typically in memory.c, not tucked away in page_add_anon_rmap. Signed-off-by: Hugh Dickins <hugh@veritas.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'mm/swapfile.c')
1 files changed, 1 insertions, 1 deletions
diff --git a/mm/swapfile.c b/mm/swapfile.c
index 05c85129124..296e0bbf783 100644
--- a/mm/swapfile.c
+++ b/mm/swapfile.c
@@ -407,7 +407,7 @@ void free_swap_and_cache(swp_entry_t entry)
static void unuse_pte(struct vm_area_struct *vma, pte_t *pte,
unsigned long addr, swp_entry_t entry, struct page *page)
- inc_mm_counter(vma->vm_mm, rss);
+ inc_mm_counter(vma->vm_mm, anon_rss);
set_pte_at(vma->vm_mm, addr, pte,
pte_mkold(mk_pte(page, vma->vm_page_prot)));