The patch titled
unevictable-lru-infrastructure: kill unnecessary lock_page() in vmscan.c
has been added to the -mm tree. Its filename is
unevictable-lru-infrastructure-kill-unnecessary-lock_page-in-vmscanc.patch
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*** Remember to use Documentation/SubmitChecklist when testing your code ***
See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find
out what to do about this
The current -mm tree may be found at http://userweb.kernel.org/~akpm/mmotm/
------------------------------------------------------
Subject: unevictable-lru-infrastructure: kill unnecessary lock_page() in vmscan.c
From: KOSAKI Motohiro <kosaki.motohiro@xxxxxxxxxxxxxx>
Old version putback_lru_page need() page lock held. but current one
doesn't.
So, several lock_page() can be removeed.
Signed-off-by: KOSAKI Motohiro <kosaki.motohiro@xxxxxxxxxxxxxx>
Signed-off-by: Lee Schermerhorn <lee.schermerhorn@xxxxxx>
Cc: Rik van Riel <riel@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/vmscan.c | 20 ++------------------
1 file changed, 2 insertions(+), 18 deletions(-)
diff -puN mm/vmscan.c~unevictable-lru-infrastructure-kill-unnecessary-lock_page-in-vmscanc mm/vmscan.c
--- a/mm/vmscan.c~unevictable-lru-infrastructure-kill-unnecessary-lock_page-in-vmscanc
+++ a/mm/vmscan.c
@@ -545,22 +545,6 @@ void putback_lru_page(struct page *page)
/*
- * Cull page that shrink_*_list() has detected to be unevictable
- * under page lock to close races with other tasks that might be making
- * the page evictable. Avoid stranding an evictable page on the
- * unevictable list.
- */
-static void cull_unevictable_page(struct page *page)
-{
- get_page(page);
- lock_page(page);
- putback_lru_page(page);
- unlock_page(page);
- put_page(page);
-}
-
-
-/*
* shrink_page_list() returns the number of reclaimed pages
*/
static unsigned long shrink_page_list(struct list_head *page_list,
@@ -1119,7 +1103,7 @@ static unsigned long shrink_inactive_lis
list_del(&page->lru);
if (unlikely(!page_evictable(page, NULL))) {
spin_unlock_irq(&zone->lru_lock);
- cull_unevictable_page(page);
+ putback_lru_page(page);
spin_lock_irq(&zone->lru_lock);
continue;
}
@@ -1223,7 +1207,7 @@ static void shrink_active_list(unsigned
list_del(&page->lru);
if (unlikely(!page_evictable(page, NULL))) {
- cull_unevictable_page(page);
+ putback_lru_page(page);
continue;
}
_
Patches currently in -mm which might be from kosaki.motohiro@xxxxxxxxxxxxxx are
page-allocator-inlnie-some-__alloc_pages-wrappers.patch
page-allocator-inlnie-some-__alloc_pages-wrappers-fix.patch
mm-hugetlbc-fix-duplicate-variable.patch
page-flags-record-page-flag-overlays-explicitly.patch
slub-record-page-flag-overlays-explicitly.patch
slob-record-page-flag-overlays-explicitly.patch
pm-schedule-sysrq-poweroff-on-boot-cpu-fix.patch
call_usermodehelper-increase-reliability.patch
cgroup-list_for_each-cleanup-v2.patch
cgroup-anotate-two-variables-with-__read_mostly.patch
memcg-remove-refcnt-from-page_cgroup-fix-memcg-fix-mem_cgroup_end_migration-race.patch
memcg-remove-refcnt-from-page_cgroup-memcg-fix-shmem_unuse_inode-charging.patch
memcg-handle-swap-cache-fix-shmem-page-migration-incorrectness-on-memcgroup.patch
memcg-clean-up-checking-of-the-disabled-flag.patch
memcg-clean-up-checking-of-the-disabled-flag-memcg-further-checking-of-disabled-flag.patch
per-task-delay-accounting-update-document-and-getdelaysc-for-memory-reclaim.patch
full-conversion-to-early_initcall-interface-remove-old-interface-fix-fix.patch
relay-add-buffer-only-channels-useful-for-early-logging-fix.patch
mm-speculative-page-references-fix-migration_entry_wait-for-speculative-page-cache.patch
vmscan-use-an-indexed-array-for-lru-variables.patch
swap-use-an-array-for-the-lru-pagevecs.patch
define-page_file_cache-function-fix-splitlru-shmem_getpage-setpageswapbacked-sooner.patch
vmscan-split-lru-lists-into-anon-file-sets-collect-lru-meminfo-statistics-from-correct-offset.patch
vmscan-split-lru-lists-into-anon-file-sets-prevent-incorrect-oom-under-split_lru.patch
vmscan-split-lru-lists-into-anon-file-sets-split_lru-fix-pagevec_move_tail-doesnt-treat-unevictable-page.patch
vmscan-split-lru-lists-into-anon-file-sets-splitlru-memcg-swapbacked-pages-active.patch
vmscan-split-lru-lists-into-anon-file-sets-splitlru-bdi_cap_swap_backed.patch
vmscan-second-chance-replacement-for-anonymous-pages.patch
unevictable-lru-infrastructure.patch
unevictable-lru-infrastructure-fix.patch
unevictable-lru-infrastructure-remove-redundant-page-mapping-check.patch
unevictable-lru-infrastructure-putback_lru_page-unevictable-page-handling-rework.patch
unevictable-lru-infrastructure-kill-unnecessary-lock_page-in-vmscanc.patch
unevictable-lru-infrastructure-revert-migration-change-of-unevictable-lru-infrastructure.patch
unevictable-lru-page-statistics.patch
unevictable-lru-page-statistics-fix-printk-in-show_free_areas.patch
unevictable-lru-page-statistics-units-fix.patch
shm_locked-pages-are-unevictable.patch
shm_locked-pages-are-unevictable-revert-shm-change-of-shm_locked-pages-are-unevictable-patch.patch
mlock-mlocked-pages-are-unevictable.patch
mlock-mlocked-pages-are-unevictable-fix.patch
mlock-mlocked-pages-are-unevictable-fix-fix.patch
mlock-mlocked-pages-are-unevictable-fix-3.patch
mlock-mlocked-pages-are-unevictable-fix-fix-munlock-page-table-walk-now-requires-mm.patch
mlock-mlocked-pages-are-unevictable-restore-patch-failure-hunk-of-mlock-mlocked-pages-are-unevictablepatch.patch
mlock-mlocked-pages-are-unevictable-fix-truncate-race-and-sevaral-comments.patch
mmap-handle-mlocked-pages-during-map-remap-unmap.patch
fix-double-unlock_page-in-2626-rc5-mm3-kernel-bug-at-mm-filemapc-575.patch
mmap-handle-mlocked-pages-during-map-remap-unmap-cleanup.patch
vmstat-mlocked-pages-statistics.patch
vmstat-mlocked-pages-statistics-fix-incorrect-mlocked-field-of-proc-meminfo.patch
vmstat-mlocked-pages-statistics-fix.patch
swap-cull-unevictable-pages-in-fault-path-fix.patch
vmstat-unevictable-and-mlocked-pages-vm-events.patch
restore-patch-failure-of-vmstat-unevictable-and-mlocked-pages-vm-eventspatch.patch
vmscan-unevictable-lru-scan-sysctl.patch
vmscan-unevictable-lru-scan-sysctl-nommu-fix.patch
vmscam-kill-unused-lru-functions.patch
make-mm-memoryc-print_bad_pte-static.patch
mm-swapfilec-make-code-static.patch
make-mm-rmapc-anon_vma_cachep-static.patch
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