From: Dave Jones <davej@redhat.com>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: Linux Kernel <linux-kernel@vger.kernel.org>,
linux-mm@kvack.org,
Linus Torvalds <torvalds@linux-foundation.org>,
Sasha Levin <sasha.levin@oracle.com>,
Cyrill Gorcunov <gorcunov@gmail.com>,
Joonsoo Kim <iamjoonsoo.kim@lge.com>,
Wanpeng Li <liwanp@linux.vnet.ibm.com>,
Bob Liu <bob.liu@oracle.com>,
Konstantin Khlebnikov <koct9i@gmail.com>
Subject: Re: bad rss-counter message in 3.14rc5
Date: Tue, 11 Mar 2014 00:51:09 -0400 [thread overview]
Message-ID: <20140311045109.GB12551@redhat.com> (raw)
In-Reply-To: <20140310214612.3b4de36a.akpm@linux-foundation.org>
On Mon, Mar 10, 2014 at 09:46:12PM -0700, Andrew Morton wrote:
> On Mon, 10 Mar 2014 20:13:40 -0700 Andrew Morton <akpm@linux-foundation.org> wrote:
>
> > > Anyone ? I'm hitting this trace on an almost daily basis, which is a pain
> > > while trying to reproduce a different bug..
> >
> > Damn, I thought we'd fixed that but it seems not. Cc's added.
> >
> > Guys, what stops the migration target page from coming unlocked in
> > parallel with zap_pte_range()'s call to migration_entry_to_page()?
>
> page_table_lock, sort-of. At least, transitions of is_migration_entry()
> and page_locked() happen under ptl.
>
> I don't see any holes in regular migration. Do you know if this is
> reproducible with CONFIG_NUMA_BALANCING=n or CONFIG_NUMA=n?
CONFIG_NUMA_BALANCING was n already btw, so I'll do a NUMA=n run.
Dave
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next prev parent reply other threads:[~2014-03-11 4:51 UTC|newest]
Thread overview: 41+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-03-05 17:45 bad rss-counter message in 3.14rc5 Dave Jones
2014-03-05 17:57 ` Dave Jones
2014-03-07 0:22 ` Dave Jones
2014-03-11 2:49 ` Dave Jones
2014-03-11 3:13 ` Andrew Morton
2014-03-11 4:46 ` Andrew Morton
2014-03-11 4:50 ` Dave Jones
2014-03-11 4:51 ` Dave Jones [this message]
2014-03-11 5:01 ` Andrew Morton
2014-03-11 5:07 ` Dave Jones
2014-03-11 5:30 ` Dave Jones
2014-03-11 12:55 ` Sasha Levin
2014-03-11 13:20 ` Cyrill Gorcunov
2014-03-11 13:23 ` Sasha Levin
2014-03-11 13:41 ` Cyrill Gorcunov
2014-03-11 14:28 ` Dave Jones
2014-03-11 14:37 ` Cyrill Gorcunov
2014-03-11 14:58 ` Sasha Levin
2014-03-11 17:10 ` Dave Jones
2014-03-11 17:36 ` Cyrill Gorcunov
2014-03-11 17:39 ` Dave Jones
2014-03-14 12:27 ` Cyrill Gorcunov
2014-03-19 0:38 ` Hugh Dickins
2014-03-19 1:10 ` Linus Torvalds
2014-03-19 2:06 ` Hugh Dickins
2014-03-19 2:24 ` Linus Torvalds
2014-03-19 2:37 ` Hugh Dickins
2014-03-19 2:57 ` Linus Torvalds
2014-03-19 11:04 ` Jan Kara
2014-03-19 1:32 ` Sasha Levin
2014-03-19 2:06 ` Dave Jones
2014-03-19 2:11 ` Dave Jones
2014-03-19 2:19 ` Hugh Dickins
2014-03-19 14:52 ` Dave Jones
2014-03-20 5:00 ` Hugh Dickins
2014-03-20 13:51 ` Dave Jones
2014-03-20 14:19 ` Sasha Levin
2014-03-21 4:46 ` Hugh Dickins
2014-03-19 2:12 ` Hugh Dickins
2014-03-19 2:42 ` Sasha Levin
2014-03-19 12:04 ` Cyrill Gorcunov
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