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author | 2005-10-29 18:16:03 -0700 | |
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committer | 2005-10-29 21:40:37 -0700 | |
commit | fc2acab31be8e869b2d5f6de12f557f6f054f19c (patch) | |
tree | 60cf419f5e88c3c46d39675a14649ea1e5849f03 /mm | |
parent | [PATCH] mm: tlb_is_full_mm was obscure (diff) | |
download | linux-fc2acab31be8e869b2d5f6de12f557f6f054f19c.tar.gz linux-fc2acab31be8e869b2d5f6de12f557f6f054f19c.tar.bz2 linux-fc2acab31be8e869b2d5f6de12f557f6f054f19c.zip |
[PATCH] mm: tlb_finish_mmu forget rss
zap_pte_range has been counting the pages it frees in tlb->freed, then
tlb_finish_mmu has used that to update the mm's rss. That got stranger when I
added anon_rss, yet updated it by a different route; and stranger when rss and
anon_rss became mm_counters with special access macros. And it would no
longer be viable if we're relying on page_table_lock to stabilize the
mm_counter, but calling tlb_finish_mmu outside that lock.
Remove the mmu_gather's freed field, let tlb_finish_mmu stick to its own
business, just decrement the rss mm_counter in zap_pte_range (yes, there was
some point to batching the update, and a subsequent patch restores that). And
forget the anal paranoia of first reading the counter to avoid going negative
- if rss does go negative, just fix that bug.
Remove the mmu_gather's flushes and avoided_flushes from arm and arm26: no use
was being made of them. But arm26 alone was actually using the freed, in the
way some others use need_flush: give it a need_flush. arm26 seems to prefer
spaces to tabs here: respect that.
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')
-rw-r--r-- | mm/memory.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/mm/memory.c b/mm/memory.c index 585bb4e0b97f..51eb38574830 100644 --- a/mm/memory.c +++ b/mm/memory.c @@ -582,7 +582,7 @@ static void zap_pte_range(struct mmu_gather *tlb, pmd_t *pmd, if (pte_young(ptent)) mark_page_accessed(page); } - tlb->freed++; + dec_mm_counter(tlb->mm, rss); page_remove_rmap(page); tlb_remove_page(tlb, page); continue; |