diff options
| -rw-r--r-- | mm/page_alloc.c | 15 |
1 files changed, 10 insertions, 5 deletions
diff --git a/mm/page_alloc.c b/mm/page_alloc.c index 8cbc38f923aa..085de0442dd4 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -2059,7 +2059,7 @@ out_unlock: * intense memory pressure but failed atomic allocations should be easier * to recover from than an OOM. */ -static void unreserve_highatomic_pageblock(const struct alloc_context *ac) +static bool unreserve_highatomic_pageblock(const struct alloc_context *ac) { struct zonelist *zonelist = ac->zonelist; unsigned long flags; @@ -2067,6 +2067,7 @@ static void unreserve_highatomic_pageblock(const struct alloc_context *ac) struct zone *zone; struct page *page; int order; + bool ret; for_each_zone_zonelist_nodemask(zone, z, zonelist, ac->high_zoneidx, ac->nodemask) { @@ -2115,12 +2116,14 @@ static void unreserve_highatomic_pageblock(const struct alloc_context *ac) * may increase. */ set_pageblock_migratetype(page, ac->migratetype); - move_freepages_block(zone, page, ac->migratetype); + ret = move_freepages_block(zone, page, ac->migratetype); spin_unlock_irqrestore(&zone->lock, flags); - return; + return ret; } spin_unlock_irqrestore(&zone->lock, flags); } + + return false; } /* Remove an element from the buddy allocator from the fallback list */ @@ -3436,8 +3439,10 @@ should_reclaim_retry(gfp_t gfp_mask, unsigned order, * Make sure we converge to OOM if we cannot make any progress * several times in the row. */ - if (*no_progress_loops > MAX_RECLAIM_RETRIES) - return false; + if (*no_progress_loops > MAX_RECLAIM_RETRIES) { + /* Before OOM, exhaust highatomic_reserve */ + return unreserve_highatomic_pageblock(ac); + } /* * Keep reclaiming pages while there is a chance this will lead |