From e972a070e2d3296cd2e2cc2fd0561ce89a1d5ebf Mon Sep 17 00:00:00 2001 From: David Rientjes Date: Wed, 6 Aug 2014 16:07:52 -0700 Subject: mm, oom: rename zonelist locking functions try_set_zonelist_oom() and clear_zonelist_oom() are not named properly to imply that they require locking semantics to avoid out_of_memory() being reordered. zone_scan_lock is required for both functions to ensure that there is proper locking synchronization. Rename try_set_zonelist_oom() to oom_zonelist_trylock() and rename clear_zonelist_oom() to oom_zonelist_unlock() to imply there is proper locking semantics. At the same time, convert oom_zonelist_trylock() to return bool instead of int since only success and failure are tested. Signed-off-by: David Rientjes Cc: "Kirill A. Shutemov" Cc: Johannes Weiner Cc: Rik van Riel Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- mm/page_alloc.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) (limited to 'mm/page_alloc.c') diff --git a/mm/page_alloc.c b/mm/page_alloc.c index fb9908148474..578236089ec1 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -2246,8 +2246,8 @@ __alloc_pages_may_oom(gfp_t gfp_mask, unsigned int order, { struct page *page; - /* Acquire the OOM killer lock for the zones in zonelist */ - if (!try_set_zonelist_oom(zonelist, gfp_mask)) { + /* Acquire the per-zone oom lock for each zone */ + if (!oom_zonelist_trylock(zonelist, gfp_mask)) { schedule_timeout_uninterruptible(1); return NULL; } @@ -2285,7 +2285,7 @@ __alloc_pages_may_oom(gfp_t gfp_mask, unsigned int order, out_of_memory(zonelist, gfp_mask, order, nodemask, false); out: - clear_zonelist_oom(zonelist, gfp_mask); + oom_zonelist_unlock(zonelist, gfp_mask); return page; } -- cgit v1.2.3-55-g7522