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From: Baoquan He <bhe@redhat.com>
To: Hugh Dickins <hughd@google.com>, Michal Hocko <mhocko@kernel.org>,
	Vlastimil Babka <vbabka@suse.cz>
Cc: David Hildenbrand <david@redhat.com>,
	linux-mm@kvack.org, pifang@redhat.com,
	linux-kernel@vger.kernel.org, akpm@linux-foundation.org,
	aarcange@redhat.com, Mel Gorman <mgorman@suse.de>
Subject: Re: Memory hotplug softlock issue
Date: Tue, 20 Nov 2018 09:56:44 +0800	[thread overview]
Message-ID: <20181120015644.GA5727@MiWiFi-R3L-srv> (raw)
In-Reply-To: <20181119205907.GW22247@dhcp22.suse.cz>

On 11/19/18 at 09:59pm, Michal Hocko wrote:
> On Mon 19-11-18 12:34:09, Hugh Dickins wrote:
> > I'm glad that I delayed, what I had then (migration_waitqueue instead
> > of using page_waitqueue) was not wrong, but what I've been using the
> > last couple of months is rather better (and can be put to use to solve
> > similar problems in collapsing pages on huge tmpfs. but we don't need
> > to get into that at this time): put_and_wait_on_page_locked().
> > 
> > What I have not yet done is verify it on latest kernel, and research
> > the interested Cc list (Linus and Tim Chen come immediately to mind),
> > and write the commit comment. I have some testing to do on the latest
> > kernel today, so I'll throw put_and_wait_on_page_locked() in too,
> > and post tomorrow I hope.
> 
> Cool, it seems that Baoquan has a reliable test case to trigger the
> pathological case.

Yes. I will test Hugh's patch.


  reply	other threads:[~2018-11-20  1:56 UTC|newest]

Thread overview: 57+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-11-14  7:09 Memory hotplug softlock issue Baoquan He
2018-11-14  7:16 ` Baoquan He
2018-11-14  7:16   ` Baoquan He
2018-11-14  8:18 ` David Hildenbrand
2018-11-14  9:00   ` Baoquan He
2018-11-14  9:25     ` David Hildenbrand
2018-11-14  9:41       ` Michal Hocko
2018-11-14  9:48         ` David Hildenbrand
2018-11-14 10:04           ` Michal Hocko
2018-11-14  9:01   ` Michal Hocko
2018-11-14  9:22     ` David Hildenbrand
2018-11-14  9:37       ` Michal Hocko
2018-11-14  9:39         ` David Hildenbrand
2018-11-14 14:52     ` Baoquan He
2018-11-14 15:00       ` Michal Hocko
2018-11-15  5:10         ` Baoquan He
2018-11-15  7:30           ` Michal Hocko
2018-11-15  7:53             ` Baoquan He
2018-11-15  8:30               ` Michal Hocko
2018-11-15  9:42                 ` David Hildenbrand
2018-11-15  9:52                   ` Baoquan He
2018-11-15  9:53                     ` David Hildenbrand
2018-11-15 13:12                 ` Baoquan He
2018-11-15 13:19                   ` Michal Hocko
2018-11-15 13:23                     ` Baoquan He
2018-11-15 14:25                       ` Michal Hocko
2018-11-15 13:38                     ` Baoquan He
2018-11-15 14:32                       ` Michal Hocko
2018-11-15 14:34                         ` Baoquan He
2018-11-16  1:24                         ` Baoquan He
2018-11-16  9:14                           ` Michal Hocko
2018-11-17  4:22                             ` Baoquan He
2018-11-19 10:52                             ` Baoquan He
2018-11-19 12:40                               ` Michal Hocko
2018-11-19 12:51                                 ` Michal Hocko
2018-11-19 14:10                                   ` Michal Hocko
2018-11-19 16:36                                     ` Vlastimil Babka
2018-11-19 16:46                                       ` Michal Hocko
2018-11-19 16:46                                         ` Vlastimil Babka
2018-11-19 16:48                                           ` Vlastimil Babka
2018-11-19 17:01                                             ` Michal Hocko
2018-11-19 17:33                                     ` Michal Hocko
2018-11-19 20:34                                       ` Hugh Dickins
2018-11-19 20:59                                         ` Michal Hocko
2018-11-20  1:56                                           ` Baoquan He [this message]
2018-11-20  5:44                                             ` Hugh Dickins
2018-11-20 13:38                                               ` Vlastimil Babka
2018-11-20 13:58                                                 ` Baoquan He
2018-11-20 13:58                                                   ` Baoquan He
2018-11-20 14:05                                                   ` Michal Hocko
2018-11-20 14:12                                                     ` Baoquan He
2018-11-21  1:21                                                   ` Hugh Dickins
2018-11-21  1:08                                                 ` Hugh Dickins
2018-11-21  3:20                                                   ` Hugh Dickins
2018-11-21 17:31                                               ` Michal Hocko
2018-11-22  1:53                                                 ` Hugh Dickins
2018-11-14 10:00 ` Michal Hocko

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