Messages in this thread Patch in this message | | | From | Mel Gorman <> | Subject | [PATCH 3/4] mm, page_alloc: move might_sleep_if check to the allocator slowpath -revert | Date | Wed, 27 Apr 2016 13:24:44 +0100 |
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Vlastimil Babka pointed out that a patch weakens a zone_reclaim test which while "safe" defeats the purposes of the debugging check. As most configurations eliminate this check anyway, I thought it was better to simply revert the patch instead of adding a second check in zone_reclaim.
This is a revert of the mmotm patch mm-page_alloc-move-might_sleep_if-check-to-the-allocator-slowpath.patch .
Suggested-by: Vlastimil Babka <vbabka@suse.cz> Signed-off-by: Mel Gorman <mgorman@techsingularity.net> --- mm/page_alloc.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/mm/page_alloc.c b/mm/page_alloc.c index 45a36e98b9cb..599bd1a49384 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -3606,8 +3606,6 @@ __alloc_pages_slowpath(gfp_t gfp_mask, unsigned int order, return NULL; } - might_sleep_if(gfp_mask & __GFP_DIRECT_RECLAIM); - /* * We also sanity check to catch abuse of atomic reserves being used by * callers that are not in atomic context. @@ -3806,6 +3804,8 @@ __alloc_pages_nodemask(gfp_t gfp_mask, unsigned int order, lockdep_trace_alloc(gfp_mask); + might_sleep_if(gfp_mask & __GFP_DIRECT_RECLAIM); + if (should_fail_alloc_page(gfp_mask, order)) return NULL; -- 2.6.4
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