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From: Vladimir Davydov <vdavydov-bzQdu9zFT3WakBO8gow8eQ@public.gmane.org>
To: Tejun Heo <tj-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
Cc: Andrew Morton
	<akpm-de/tnXTf+JLsfHDXvbKv3WD2FQJk+8+b@public.gmane.org>,
	hannes-druUgvl0LCNAfugRpC6u6w@public.gmane.org,
	mhocko-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org,
	cgroups-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
	linux-mm-Bw31MaZKKs3YtjvyW6yDsg@public.gmane.org,
	kernel-team-b10kYP2dOMg@public.gmane.org,
	Joonsoo Kim <iamjoonsoo.kim-Hm3cg6mZ9cc@public.gmane.org>,
	Christoph Lameter <cl-vYTEC60ixJUAvxtiuMwx3w@public.gmane.org>,
	David Rientjes <rientjes-hpIqsD4AKlfQT0dZR+AlfA@public.gmane.org>
Subject: Re: [PATCH 3/4] memcg: punt high overage reclaim to return-to-userland path
Date: Sat, 29 Aug 2015 10:59:05 +0300	[thread overview]
Message-ID: <20150829075905.GO9610@esperanza> (raw)
In-Reply-To: <20150828220632.GF11089-Gd/HAXX7CRxy/B6EtB590w@public.gmane.org>

On Fri, Aug 28, 2015 at 06:06:32PM -0400, Tejun Heo wrote:
> On Fri, Aug 28, 2015 at 04:44:32PM -0400, Tejun Heo wrote:
> > Ah, cool, so it was a bug from slub.  Punting to return path still has
> > some niceties but if we can't consistently get rid of stack
> > consumption it's not that attractive.  Let's revisit it later together
> > with hard limit reclaim.
> 
> So, I can't check right now but I'm pretty sure I was using SLAB on my
> test config, so this issue may exist there too.

Yeah, SLAB is broken too. It was accidentally broken by commit
4167e9b2cf10 ("mm: remove GFP_THISNODE"), which among other things made
SLAB filter out __GFP_WAIT from gfp flags when probing a NUMA node. I'll
take a look what we can do with that.

Thanks,
Vladimir

  parent reply	other threads:[~2015-08-29  7:59 UTC|newest]

Thread overview: 40+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-08-28 15:25 [PATCHSET] memcg: improve high limit behavior and always enable kmemcg on dfl hier Tejun Heo
     [not found] ` <1440775530-18630-1-git-send-email-tj-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
2015-08-28 15:25   ` [PATCH 1/4] memcg: fix over-high reclaim amount Tejun Heo
2015-08-28 17:06     ` Michal Hocko
     [not found]       ` <20150828170612.GA21463-2MMpYkNvuYDjFM9bn6wA6Q@public.gmane.org>
2015-08-28 18:32         ` Tejun Heo
     [not found]           ` <20150828183209.GA9423-qYNAdHglDFBN0TnZuCh8vA@public.gmane.org>
2015-08-31  7:51             ` Michal Hocko
     [not found]               ` <20150831075133.GA29723-2MMpYkNvuYDjFM9bn6wA6Q@public.gmane.org>
2015-08-31 13:38                 ` Tejun Heo
2015-09-01 12:51                   ` Michal Hocko
     [not found]                     ` <20150901125149.GD8810-2MMpYkNvuYDjFM9bn6wA6Q@public.gmane.org>
2015-09-01 18:33                       ` Tejun Heo
2015-08-28 15:25   ` [PATCH 2/4] memcg: flatten task_struct->memcg_oom Tejun Heo
     [not found]     ` <1440775530-18630-3-git-send-email-tj-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
2015-08-28 17:11       ` Michal Hocko
2015-08-28 15:25   ` [PATCH 3/4] memcg: punt high overage reclaim to return-to-userland path Tejun Heo
     [not found]     ` <1440775530-18630-4-git-send-email-tj-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
2015-08-28 16:36       ` Vladimir Davydov
2015-08-28 16:48         ` Tejun Heo
2015-08-28 20:32           ` Vladimir Davydov
2015-08-28 20:44             ` Tejun Heo
2015-08-28 22:06               ` Tejun Heo
     [not found]                 ` <20150828220632.GF11089-Gd/HAXX7CRxy/B6EtB590w@public.gmane.org>
2015-08-29  7:59                   ` Vladimir Davydov [this message]
2015-08-30 15:52             ` Vladimir Davydov
2015-08-28 17:13       ` Michal Hocko
     [not found]         ` <20150828171322.GC21463-2MMpYkNvuYDjFM9bn6wA6Q@public.gmane.org>
2015-08-28 17:56           ` Tejun Heo
2015-08-28 20:45           ` Vladimir Davydov
2015-08-28 20:53             ` Tejun Heo
     [not found]               ` <20150828205301.GB11089-Gd/HAXX7CRxy/B6EtB590w@public.gmane.org>
2015-08-28 21:07                 ` Vladimir Davydov
2015-08-28 21:14                   ` Tejun Heo
2015-08-28 15:25   ` [PATCH 4/4] memcg: always enable kmemcg on the default hierarchy Tejun Heo
     [not found]     ` <1440775530-18630-5-git-send-email-tj-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
2015-08-28 16:49       ` Vladimir Davydov
2015-08-28 16:56         ` Tejun Heo
2015-08-28 17:14         ` Michal Hocko
2015-08-28 17:41           ` Tejun Heo
2015-09-01 12:44             ` Michal Hocko
     [not found]               ` <20150901124459.GC8810-2MMpYkNvuYDjFM9bn6wA6Q@public.gmane.org>
2015-09-01 18:51                 ` Tejun Heo
2015-09-04 13:30                   ` Michal Hocko
     [not found]                     ` <20150904133038.GC8220-2MMpYkNvuYDjFM9bn6wA6Q@public.gmane.org>
2015-09-04 15:38                       ` Vladimir Davydov
2015-09-07  9:39                         ` Michal Hocko
2015-09-07 10:01                           ` Vladimir Davydov
2015-09-07 11:03                             ` Michal Hocko
2015-09-04 16:18                     ` Tejun Heo
     [not found]                       ` <20150904161845.GB25329-qYNAdHglDFBN0TnZuCh8vA@public.gmane.org>
2015-09-07 10:54                         ` Michal Hocko
2015-09-08 18:50                           ` Tejun Heo
2015-11-05 17:30     ` Michal Hocko

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