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From: Daniel Jordan <daniel.m.jordan@oracle.com>
To: Michal Hocko <mhocko@kernel.org>
Cc: Daniel Jordan <daniel.m.jordan@oracle.com>,
David Hildenbrand <david@redhat.com>,
Shile Zhang <shile.zhang@linux.alibaba.com>,
Andrew Morton <akpm@linux-foundation.org>,
Kirill Tkhai <ktkhai@virtuozzo.com>,
Pavel Tatashin <pasha.tatashin@soleen.com>,
linux-mm@kvack.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH v3] mm: fix tick timer stall during deferred page init
Date: Wed, 1 Apr 2020 12:18:10 -0400 [thread overview]
Message-ID: <20200401161810.xvqikca2x46yqrlx@ca-dmjordan1.us.oracle.com> (raw)
In-Reply-To: <20200401161243.GW22681@dhcp22.suse.cz>
On Wed, Apr 01, 2020 at 06:12:43PM +0200, Michal Hocko wrote:
> On Wed 01-04-20 12:09:29, Daniel Jordan wrote:
> > On Wed, Apr 01, 2020 at 06:00:48PM +0200, Michal Hocko wrote:
> > > On Wed 01-04-20 17:50:22, David Hildenbrand wrote:
> > > > On 01.04.20 17:42, Michal Hocko wrote:
> > > > > This needs a double checking but I strongly believe that the lock can be
> > > > > simply dropped in this path.
> >
> > This is what my fix does, it limits the time the resize lock is held.
>
> Just remove it from the deferred intialization and add a comment that we
> deliberately not taking the lock here because abc
I think it has to be a little more involved because of the window where
interrupts might allocate during deferred init, as Vlastimil pointed out a few
years ago when the change was made. I'll explain myself in the changelog.
next prev parent reply other threads:[~2020-04-01 16:56 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-03-11 12:38 Shile Zhang
2020-03-11 17:45 ` Pavel Tatashin
2020-03-11 20:16 ` Kirill Tkhai
2020-03-11 20:25 ` Pavel Tatashin
2020-03-19 19:05 ` Daniel Jordan
2020-03-26 18:58 ` Daniel Jordan
2020-03-26 19:36 ` Pavel Tatashin
2020-03-27 4:39 ` Shile Zhang
2020-03-28 0:17 ` Daniel Jordan
2020-04-01 14:26 ` David Hildenbrand
2020-04-01 15:42 ` Michal Hocko
2020-04-01 15:50 ` David Hildenbrand
2020-04-01 16:00 ` Michal Hocko
2020-04-01 16:09 ` Daniel Jordan
2020-04-01 16:12 ` Michal Hocko
2020-04-01 16:15 ` David Hildenbrand
2020-04-01 16:18 ` Daniel Jordan [this message]
2020-04-01 16:26 ` Michal Hocko
2020-04-01 16:41 ` Pavel Tatashin
2020-04-01 16:46 ` Michal Hocko
2020-04-01 16:51 ` Pavel Tatashin
2020-04-01 17:13 ` Daniel Jordan
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