linux-kernel - Re: [PATCH 5/6] mm: memcontrol: per-lruvec stats infrastructure

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Message-ID: <20170601014425.GA11815@cmpxchg.org>
Date:   Wed, 31 May 2017 21:44:25 -0400
From:   Johannes Weiner <hannes@...xchg.org>
To:     Andrew Morton <akpm@...ux-foundation.org>
Cc:     Josef Bacik <josef@...icpanda.com>, Michal Hocko <mhocko@...e.com>,
        Vladimir Davydov <vdavydov.dev@...il.com>,
        Rik van Riel <riel@...hat.com>, linux-mm@...ck.org,
        cgroups@...r.kernel.org, linux-kernel@...r.kernel.org,
        kernel-team@...com, Tony Lindgren <tony@...mide.com>,
        Russell King <rmk@...linux.org.uk>,
        Yury Norov <ynorov@...iumnetworks.com>,
        Stephen Rothwell <sfr@...b.auug.org.au>
Subject: Re: [PATCH 5/6] mm: memcontrol: per-lruvec stats infrastructure

On Wed, May 31, 2017 at 11:18:21AM -0700, Andrew Morton wrote:
> On Wed, 31 May 2017 13:14:50 -0400 Johannes Weiner <hannes@...xchg.org> wrote:
> 
> > Andrew, the 0day tester found a crash with this when special pages get
> > faulted. They're not charged to any cgroup and we'll deref NULL.
> > 
> > Can you include the following fix on top of this patch please? Thanks!
> 
> OK.  But this won't fix the init ordering crash which the arm folks are
> seeing?
> 
> I'm wondering if we should ask Stephen to drop
> 
> mm-vmstat-move-slab-statistics-from-zone-to-node-counters.patch
> mm-memcontrol-use-the-node-native-slab-memory-counters.patch
> mm-memcontrol-use-generic-mod_memcg_page_state-for-kmem-pages.patch
> mm-memcontrol-per-lruvec-stats-infrastructure.patch
> mm-memcontrol-account-slab-stats-per-lruvec.patch

Sorry about the wreckage.

Dropping these makes sense to me for the time being.

I'll fix up the init ordering issue.