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author | Linus Torvalds <torvalds@linux-foundation.org> | 2012-10-09 16:23:15 +0900 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2012-10-09 16:23:15 +0900 |
commit | 9e2d8656f5e8aa214e66b462680cf86b210b74a8 (patch) | |
tree | f67d62e896cedf75599ea45f9ecf9999c6ad24cd /mm/swap.c | |
parent | 1ea4f4f8405cc1ceec23f2d261bc3775785e6712 (diff) | |
parent | 9e695d2ecc8451cc2c1603d60b5c8e7f5581923a (diff) | |
download | op-kernel-dev-9e2d8656f5e8aa214e66b462680cf86b210b74a8.zip op-kernel-dev-9e2d8656f5e8aa214e66b462680cf86b210b74a8.tar.gz |
Merge branch 'akpm' (Andrew's patch-bomb)
Merge patches from Andrew Morton:
"A few misc things and very nearly all of the MM tree. A tremendous
amount of stuff (again), including a significant rbtree library
rework."
* emailed patches from Andrew Morton <akpm@linux-foundation.org>: (160 commits)
sparc64: Support transparent huge pages.
mm: thp: Use more portable PMD clearing sequenece in zap_huge_pmd().
mm: Add and use update_mmu_cache_pmd() in transparent huge page code.
sparc64: Document PGD and PMD layout.
sparc64: Eliminate PTE table memory wastage.
sparc64: Halve the size of PTE tables
sparc64: Only support 4MB huge pages and 8KB base pages.
memory-hotplug: suppress "Trying to free nonexistent resource <XXXXXXXXXXXXXXXX-YYYYYYYYYYYYYYYY>" warning
mm: memcg: clean up mm_match_cgroup() signature
mm: document PageHuge somewhat
mm: use %pK for /proc/vmallocinfo
mm, thp: fix mlock statistics
mm, thp: fix mapped pages avoiding unevictable list on mlock
memory-hotplug: update memory block's state and notify userspace
memory-hotplug: preparation to notify memory block's state at memory hot remove
mm: avoid section mismatch warning for memblock_type_name
make GFP_NOTRACK definition unconditional
cma: decrease cc.nr_migratepages after reclaiming pagelist
CMA: migrate mlocked pages
kpageflags: fix wrong KPF_THP on non-huge compound pages
...
Diffstat (limited to 'mm/swap.c')
-rw-r--r-- | mm/swap.c | 13 |
1 files changed, 11 insertions, 2 deletions
@@ -446,13 +446,22 @@ void mark_page_accessed(struct page *page) } EXPORT_SYMBOL(mark_page_accessed); +/* + * Order of operations is important: flush the pagevec when it's already + * full, not when adding the last page, to make sure that last page is + * not added to the LRU directly when passed to this function. Because + * mark_page_accessed() (called after this when writing) only activates + * pages that are on the LRU, linear writes in subpage chunks would see + * every PAGEVEC_SIZE page activated, which is unexpected. + */ void __lru_cache_add(struct page *page, enum lru_list lru) { struct pagevec *pvec = &get_cpu_var(lru_add_pvecs)[lru]; page_cache_get(page); - if (!pagevec_add(pvec, page)) + if (!pagevec_space(pvec)) __pagevec_lru_add(pvec, lru); + pagevec_add(pvec, page); put_cpu_var(lru_add_pvecs); } EXPORT_SYMBOL(__lru_cache_add); @@ -742,7 +751,7 @@ void lru_add_page_tail(struct page *page, struct page *page_tail, SetPageLRU(page_tail); - if (page_evictable(page_tail, NULL)) { + if (page_evictable(page_tail)) { if (PageActive(page)) { SetPageActive(page_tail); active = 1; |