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authorHugh Dickins <hugh@veritas.com>2005-10-30 01:16:05 (GMT)
committerLinus Torvalds <torvalds@g5.osdl.org>2005-10-30 04:40:38 (GMT)
commit4294621f41a85497019fae64341aa5351a1921b7 (patch)
treefdeb7eb44384a99d0679ffa6de5019bab0ea2166 /mm/fremap.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/fremap.c')
-rw-r--r--mm/fremap.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/mm/fremap.c b/mm/fremap.c
index ab23a06..fd7f2a1 100644
--- a/mm/fremap.c
+++ b/mm/fremap.c
@@ -39,7 +39,7 @@ static inline void zap_pte(struct mm_struct *mm, struct vm_area_struct *vma,
set_page_dirty(page);
page_remove_rmap(page);
page_cache_release(page);
- dec_mm_counter(mm, rss);
+ dec_mm_counter(mm, file_rss);
}
}
} else {
@@ -95,7 +95,7 @@ int install_page(struct mm_struct *mm, struct vm_area_struct *vma,
zap_pte(mm, vma, addr, pte);
- inc_mm_counter(mm,rss);
+ inc_mm_counter(mm, file_rss);
flush_icache_page(vma, page);
set_pte_at(mm, addr, pte, mk_pte(page, prot));
page_add_file_rmap(page);

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