From: Reza Arbab arbab@linux.vnet.ibm.com
[ Upstream commit 8d35bb310698c69d73073b26fc581f2e3f7f621d ]
After commit e2ecc8a79ed4 ("mm, vmstat: print non-populated zones in zoneinfo"), /proc/zoneinfo will show unpopulated zones.
A memoryless node, having no populated zones at all, was previously ignored, but will now trigger the WARN() in is_zone_first_populated().
Remove this warning, as its only purpose was to warn of a situation that has since been enabled.
Aside: The "per-node stats" are still printed under the first populated zone, but that's not necessarily the first stanza any more. I'm not sure which criteria is more important with regard to not breaking parsers, but it looks a little weird to the eye.
Fixes: e2ecc8a79ed4 ("mm, vmstat: print node-based stats in zoneinfo file") Link: http://lkml.kernel.org/r/1493854905-10918-1-git-send-email-arbab@linux.vnet.... Signed-off-by: Reza Arbab arbab@linux.vnet.ibm.com Cc: David Rientjes rientjes@google.com Cc: Anshuman Khandual khandual@linux.vnet.ibm.com Cc: Vlastimil Babka vbabka@suse.cz Cc: Mel Gorman mgorman@techsingularity.net Cc: Johannes Weiner hannes@cmpxchg.org Signed-off-by: Andrew Morton akpm@linux-foundation.org Signed-off-by: Linus Torvalds torvalds@linux-foundation.org Signed-off-by: Sasha Levin alexander.levin@microsoft.com --- mm/vmstat.c | 2 -- 1 file changed, 2 deletions(-)
diff --git a/mm/vmstat.c b/mm/vmstat.c index 3863b5d6d598..6ad26e3a3820 100644 --- a/mm/vmstat.c +++ b/mm/vmstat.c @@ -1351,8 +1351,6 @@ static bool is_zone_first_populated(pg_data_t *pgdat, struct zone *zone) return zone == compare; }
- /* The zone must be somewhere! */ - WARN_ON_ONCE(1); return false; }