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mm, page_alloc: pull no_progress_loops update to should_reclaim_retry()

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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.

[[email protected]: fix missing pointer dereferences]
Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Vlastimil Babka <[email protected]>
Acked-by: Hillf Danton <[email protected]>
Acked-by: Michal Hocko <[email protected]>
Cc: Mel Gorman <[email protected]>
Cc: Joonsoo Kim <[email protected]>
Cc: David Rientjes <[email protected]>
Cc: Rik van Riel <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
Vlastimil Babka 2016-10-07 17:00:40 -07:00 • committed by Linus Torvalds
commit 423b452e15
1 changed files with 14 additions and 14 deletions
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28
mm/page_alloc.c
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@ -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;
/*