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| author | Vlastimil Babka <vbabka@suse.cz> | 2016-10-07 17:00:40 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2016-10-07 18:46:29 -0700 |
| commit | 423b452e1553e3d19b632880bf2adf1f058ab267 (patch) | |
| tree | 0bdea616f1b8155ca4c47aa3172e0eadc0540f60 | |
| parent | 9f7e3387939b036faacf4e7f32de7bb92a6635d6 (diff) | |
| download | linux-stable-423b452e1553e3d19b632880bf2adf1f058ab267.tar.gz linux-stable-423b452e1553e3d19b632880bf2adf1f058ab267.tar.bz2 linux-stable-423b452e1553e3d19b632880bf2adf1f058ab267.zip | |
mm, page_alloc: pull no_progress_loops update to should_reclaim_retry()
The should_reclaim_retry() makes decisions based on no_progress_loops,
so it makes sense to also update the counter there. It will be also
consistent with should_compact_retry() and compaction_retries. No
functional change.
[hillf.zj@alibaba-inc.com: fix missing pointer dereferences]
Link: http://lkml.kernel.org/r/20160926162025.21555-3-vbabka@suse.cz
Signed-off-by: Vlastimil Babka <vbabka@suse.cz>
Acked-by: Hillf Danton <hillf.zj@alibaba-inc.com>
Acked-by: Michal Hocko <mhocko@suse.com>
Cc: Mel Gorman <mgorman@techsingularity.net>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Cc: David Rientjes <rientjes@google.com>
Cc: Rik van Riel <riel@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| -rw-r--r-- | mm/page_alloc.c | 28 |
1 files changed, 14 insertions, 14 deletions
diff --git a/mm/page_alloc.c b/mm/page_alloc.c index 891e3881a6e0..bcfa647c1752 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -3402,16 +3402,26 @@ bool gfp_pfmemalloc_allowed(gfp_t gfp_mask) static inline bool should_reclaim_retry(gfp_t gfp_mask, unsigned order, struct alloc_context *ac, int alloc_flags, - bool did_some_progress, int no_progress_loops) + bool did_some_progress, int *no_progress_loops) { struct zone *zone; struct zoneref *z; /* + * Costly allocations might have made a progress but this doesn't mean + * their order will become available due to high fragmentation so + * always increment the no progress counter for them + */ + if (did_some_progress && order <= PAGE_ALLOC_COSTLY_ORDER) + *no_progress_loops = 0; + else + (*no_progress_loops)++; + + /* * Make sure we converge to OOM if we cannot make any progress * several times in the row. */ - if (no_progress_loops > MAX_RECLAIM_RETRIES) + if (*no_progress_loops > MAX_RECLAIM_RETRIES) return false; /* @@ -3426,7 +3436,7 @@ should_reclaim_retry(gfp_t gfp_mask, unsigned order, unsigned long reclaimable; available = reclaimable = zone_reclaimable_pages(zone); - available -= DIV_ROUND_UP(no_progress_loops * available, + available -= DIV_ROUND_UP((*no_progress_loops) * available, MAX_RECLAIM_RETRIES); available += zone_page_state_snapshot(zone, NR_FREE_PAGES); @@ -3642,18 +3652,8 @@ retry: if (order > PAGE_ALLOC_COSTLY_ORDER && !(gfp_mask & __GFP_REPEAT)) goto nopage; - /* - * Costly allocations might have made a progress but this doesn't mean - * their order will become available due to high fragmentation so - * always increment the no progress counter for them - */ - if (did_some_progress && order <= PAGE_ALLOC_COSTLY_ORDER) - no_progress_loops = 0; - else - no_progress_loops++; - if (should_reclaim_retry(gfp_mask, order, ac, alloc_flags, - did_some_progress > 0, no_progress_loops)) + did_some_progress > 0, &no_progress_loops)) goto retry; /* |