+++ /dev/null
-From 0bf1457f0cfca7bc026a82323ad34bcf58ad035d Mon Sep 17 00:00:00 2001
-From: Johannes Weiner <hannes@cmpxchg.org>
-Date: Tue, 8 Apr 2014 16:04:10 -0700
-Subject: mm: vmscan: do not swap anon pages just because free+file is low
-
-From: Johannes Weiner <hannes@cmpxchg.org>
-
-commit 0bf1457f0cfca7bc026a82323ad34bcf58ad035d upstream.
-
-Page reclaim force-scans / swaps anonymous pages when file cache drops
-below the high watermark of a zone in order to prevent what little cache
-remains from thrashing.
-
-However, on bigger machines the high watermark value can be quite large
-and when the workload is dominated by a static anonymous/shmem set, the
-file set might just be a small window of used-once cache. In such
-situations, the VM starts swapping heavily when instead it should be
-recycling the no longer used cache.
-
-This is a longer-standing problem, but it's more likely to trigger after
-commit 81c0a2bb515f ("mm: page_alloc: fair zone allocator policy")
-because file pages can no longer accumulate in a single zone and are
-dispersed into smaller fractions among the available zones.
-
-To resolve this, do not force scan anon when file pages are low but
-instead rely on the scan/rotation ratios to make the right prediction.
-
-Signed-off-by: Johannes Weiner <hannes@cmpxchg.org>
-Acked-by: Rafael Aquini <aquini@redhat.com>
-Cc: Rik van Riel <riel@redhat.com>
-Cc: Mel Gorman <mgorman@suse.de>
-Cc: Hugh Dickins <hughd@google.com>
-Cc: Suleiman Souhlal <suleiman@google.com>
-Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
-Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
-
----
- mm/vmscan.c | 16 +---------------
- 1 file changed, 1 insertion(+), 15 deletions(-)
-
---- a/mm/vmscan.c
-+++ b/mm/vmscan.c
-@@ -1659,7 +1659,7 @@ static void get_scan_count(struct lruvec
- struct zone *zone = lruvec_zone(lruvec);
- unsigned long anon_prio, file_prio;
- enum scan_balance scan_balance;
-- unsigned long anon, file, free;
-+ unsigned long anon, file;
- bool force_scan = false;
- unsigned long ap, fp;
- enum lru_list lru;
-@@ -1713,20 +1713,6 @@ static void get_scan_count(struct lruvec
- get_lru_size(lruvec, LRU_INACTIVE_FILE);
-
- /*
-- * If it's foreseeable that reclaiming the file cache won't be
-- * enough to get the zone back into a desirable shape, we have
-- * to swap. Better start now and leave the - probably heavily
-- * thrashing - remaining file pages alone.
-- */
-- if (global_reclaim(sc)) {
-- free = zone_page_state(zone, NR_FREE_PAGES);
-- if (unlikely(file + free <= high_wmark_pages(zone))) {
-- scan_balance = SCAN_ANON;
-- goto out;
-- }
-- }
--
-- /*
- * There is enough inactive page cache, do not reclaim
- * anything from the anonymous working set right now.
- */
sh-fix-format-string-bug-in-stack-tracer.patch
mm-try_to_unmap_cluster-should-lock_page-before-mlocking.patch
mm-hugetlb-fix-softlockup-when-a-large-number-of-hugepages-are-freed.patch
-mm-vmscan-do-not-swap-anon-pages-just-because-free-file-is-low.patch
hung_task-check-the-value-of-sysctl_hung_task_timeout_sec.patch
ocfs2-dlm-fix-lock-migration-crash.patch
ocfs2-dlm-fix-recovery-hung.patch
+++ /dev/null
-From 0bf1457f0cfca7bc026a82323ad34bcf58ad035d Mon Sep 17 00:00:00 2001
-From: Johannes Weiner <hannes@cmpxchg.org>
-Date: Tue, 8 Apr 2014 16:04:10 -0700
-Subject: mm: vmscan: do not swap anon pages just because free+file is low
-
-From: Johannes Weiner <hannes@cmpxchg.org>
-
-commit 0bf1457f0cfca7bc026a82323ad34bcf58ad035d upstream.
-
-Page reclaim force-scans / swaps anonymous pages when file cache drops
-below the high watermark of a zone in order to prevent what little cache
-remains from thrashing.
-
-However, on bigger machines the high watermark value can be quite large
-and when the workload is dominated by a static anonymous/shmem set, the
-file set might just be a small window of used-once cache. In such
-situations, the VM starts swapping heavily when instead it should be
-recycling the no longer used cache.
-
-This is a longer-standing problem, but it's more likely to trigger after
-commit 81c0a2bb515f ("mm: page_alloc: fair zone allocator policy")
-because file pages can no longer accumulate in a single zone and are
-dispersed into smaller fractions among the available zones.
-
-To resolve this, do not force scan anon when file pages are low but
-instead rely on the scan/rotation ratios to make the right prediction.
-
-Signed-off-by: Johannes Weiner <hannes@cmpxchg.org>
-Acked-by: Rafael Aquini <aquini@redhat.com>
-Cc: Rik van Riel <riel@redhat.com>
-Cc: Mel Gorman <mgorman@suse.de>
-Cc: Hugh Dickins <hughd@google.com>
-Cc: Suleiman Souhlal <suleiman@google.com>
-Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
-Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
-
----
- mm/vmscan.c | 16 +---------------
- 1 file changed, 1 insertion(+), 15 deletions(-)
-
---- a/mm/vmscan.c
-+++ b/mm/vmscan.c
-@@ -1848,7 +1848,7 @@ static void get_scan_count(struct lruvec
- struct zone *zone = lruvec_zone(lruvec);
- unsigned long anon_prio, file_prio;
- enum scan_balance scan_balance;
-- unsigned long anon, file, free;
-+ unsigned long anon, file;
- bool force_scan = false;
- unsigned long ap, fp;
- enum lru_list lru;
-@@ -1902,20 +1902,6 @@ static void get_scan_count(struct lruvec
- get_lru_size(lruvec, LRU_INACTIVE_FILE);
-
- /*
-- * If it's foreseeable that reclaiming the file cache won't be
-- * enough to get the zone back into a desirable shape, we have
-- * to swap. Better start now and leave the - probably heavily
-- * thrashing - remaining file pages alone.
-- */
-- if (global_reclaim(sc)) {
-- free = zone_page_state(zone, NR_FREE_PAGES);
-- if (unlikely(file + free <= high_wmark_pages(zone))) {
-- scan_balance = SCAN_ANON;
-- goto out;
-- }
-- }
--
-- /*
- * There is enough inactive page cache, do not reclaim
- * anything from the anonymous working set right now.
- */
mm-page_alloc-spill-to-remote-nodes-before-waking-kswapd.patch
mm-try_to_unmap_cluster-should-lock_page-before-mlocking.patch
mm-hugetlb-fix-softlockup-when-a-large-number-of-hugepages-are-freed.patch
-mm-vmscan-do-not-swap-anon-pages-just-because-free-file-is-low.patch
hung_task-check-the-value-of-sysctl_hung_task_timeout_sec.patch
xattr-guard-against-simultaneous-glibc-header-inclusion.patch
ocfs2-dlm-fix-lock-migration-crash.patch
projects / thirdparty / kernel / stable-queue.git / commitdiff
