linux-kernel - Re: [PATCH v3 0/3] vmstats/vmevents flushing

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Message-ID: <20190823003347.GA4252@castle>
Date:   Fri, 23 Aug 2019 00:33:51 +0000
From:   Roman Gushchin <guro@...com>
To:     Andrew Morton <akpm@...ux-foundation.org>
CC:     "linux-mm@...ck.org" <linux-mm@...ck.org>,
        Michal Hocko <mhocko@...nel.org>,
        Johannes Weiner <hannes@...xchg.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Kernel Team <Kernel-team@...com>
Subject: Re: [PATCH v3 0/3] vmstats/vmevents flushing

On Thu, Aug 22, 2019 at 04:27:09PM -0700, Andrew Morton wrote:
> On Mon, 19 Aug 2019 16:00:51 -0700 Roman Gushchin <guro@...com> wrote:
> 
> > v3:
> >   1) rearranged patches [2/3] and [3/3] to make [1/2] and [2/2] suitable
> >   for stable backporting
> > 
> > v2:
> >   1) fixed !CONFIG_MEMCG_KMEM build by moving memcg_flush_percpu_vmstats()
> >   and memcg_flush_percpu_vmevents() out of CONFIG_MEMCG_KMEM
> >   2) merged add-comments-to-slab-enums-definition patch in
> > 
> > Thanks!
> > 
> > Roman Gushchin (3):
> >   mm: memcontrol: flush percpu vmstats before releasing memcg
> >   mm: memcontrol: flush percpu vmevents before releasing memcg
> >   mm: memcontrol: flush percpu slab vmstats on kmem offlining
> > 
> 
> Can you please explain why the first two patches were cc:stable but not
> the third?
> 
> 

Because [1] and [2] are fixing commit 42a300353577 ("mm: memcontrol: fix
recursive statistics correctness & scalabilty"), which has been merged into 5.2.

And [3] fixes commit fb2f2b0adb98 ("mm: memcg/slab: reparent memcg kmem_caches
on cgroup removal"), which is in not yet released 5.3, so stable backport isn't
required.

Thanks!