From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.linuxfoundation.org ([140.211.169.12]:42584 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754314AbeCVNuT (ORCPT ); Thu, 22 Mar 2018 09:50:19 -0400 Subject: Patch "mm: fix check for reclaimable pages in PF_MEMALLOC reclaim throttling" has been added to the 4.9-stable tree To: hannes@cmpxchg.org, akpm@linux-foundation.org, alexander.levin@microsoft.com, gregkh@linuxfoundation.org, hejianet@gmail.com, hillf.zj@alibaba-inc.com, mgorman@suse.de, mhocko@suse.com, torvalds@linux-foundation.org Cc: , From: Date: Thu, 22 Mar 2018 14:49:07 +0100 Message-ID: <152172654733204@kroah.com> MIME-Version: 1.0 Content-Type: text/plain; charset=ANSI_X3.4-1968 Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org List-ID: This is a note to let you know that I've just added the patch titled mm: fix check for reclaimable pages in PF_MEMALLOC reclaim throttling to the 4.9-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: mm-fix-check-for-reclaimable-pages-in-pf_memalloc-reclaim-throttling.patch and it can be found in the queue-4.9 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let know about it. >>From foo@baz Thu Mar 22 14:40:24 CET 2018 From: Johannes Weiner Date: Wed, 3 May 2017 14:51:54 -0700 Subject: mm: fix check for reclaimable pages in PF_MEMALLOC reclaim throttling From: Johannes Weiner [ Upstream commit d450abd81b081d45adb12f303a07dd44b15eb1bc ] PF_MEMALLOC direct reclaimers get throttled on a node when the sum of all free pages in each zone fall below half the min watermark. During the summation, we want to exclude zones that don't have reclaimables. Checking the same pgdat over and over again doesn't make sense. Fixes: 599d0c954f91 ("mm, vmscan: move LRU lists to node") Link: http://lkml.kernel.org/r/20170228214007.5621-3-hannes@cmpxchg.org Signed-off-by: Johannes Weiner Acked-by: Hillf Danton Acked-by: Michal Hocko Cc: Jia He Cc: Mel Gorman Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds Signed-off-by: Sasha Levin Signed-off-by: Greg Kroah-Hartman --- mm/vmscan.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) --- a/mm/vmscan.c +++ b/mm/vmscan.c @@ -2841,8 +2841,10 @@ static bool allow_direct_reclaim(pg_data for (i = 0; i <= ZONE_NORMAL; i++) { zone = &pgdat->node_zones[i]; - if (!managed_zone(zone) || - pgdat_reclaimable_pages(pgdat) == 0) + if (!managed_zone(zone)) + continue; + + if (!zone_reclaimable_pages(zone)) continue; pfmemalloc_reserve += min_wmark_pages(zone); Patches currently in stable-queue which might be from hannes@cmpxchg.org are queue-4.9/mm-fix-check-for-reclaimable-pages-in-pf_memalloc-reclaim-throttling.patch queue-4.9/mm-vmstat-suppress-pcp-stats-for-unpopulated-zones-in-zoneinfo.patch