From: Timothy Normand Miller <theosib@gmail.com>
To: Michal Hocko <mhocko@kernel.org>
Cc: Andrew Morton <akpm@linux-foundation.org>,
linux-mm@kvack.org, bugzilla-daemon@bugzilla.kernel.org,
Johannes Weiner <hannes@cmpxchg.org>,
Mel Gorman <mgorman@techsingularity.net>,
Rik van Riel <riel@redhat.com>
Subject: Re: [Bug 107771] New: Single process tries to use more than 1/2 physical RAM, OS starts thrashing
Date: Fri, 22 Apr 2016 19:01:15 -0400 [thread overview]
Message-ID: <CAK7bmU94X1wH3-Ld-onwb895rEUMPCRUgz39PpFLRMkLsbxCqQ@mail.gmail.com> (raw)
In-Reply-To: <20160417185327.GC9051@dhcp22.suse.cz>
On Sun, Apr 17, 2016 at 2:53 PM, Michal Hocko <mhocko@kernel.org> wrote:
> On Fri 15-04-16 15:31:22, Rik van Riel wrote:
>> On Fri, 2016-04-15 at 12:15 -0700, Andrew Morton wrote:
>> > (switched to email. Please respond via emailed reply-to-all, not via
>> > the
>> > bugzilla web interface).
>> >
>> > This is ... interesting.
>>
>> First things first. What is the value of
>> /proc/sys/vm/zone_reclaim?
>
> Also snapshots of /proc/vmstat taken every 1s or so while you see the
> trashing would be helpful.
It's been so long since I reported this bug that I don't recall
exactly what I was doing. I think I was running Synopsys. I tried
artificially reproducing this by just allocating a huge amount of
memory and touching all the pages, but the problem didn't manifest. I
wonder if Synopsys was allocating pages it didn't touch or mmaping
files or some other weird thing.
> --
> Michal Hocko
> SUSE Labs
--
Timothy Normand Miller, PhD
Assistant Professor of Computer Science, Binghamton University
http://www.cs.binghamton.edu/~millerti/
Open Graphics Project
--
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next prev parent reply other threads:[~2016-04-22 23:01 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <bug-107771-27@https.bugzilla.kernel.org/>
2016-04-15 19:15 ` Andrew Morton
2016-04-15 19:31 ` Rik van Riel
2016-04-17 18:53 ` Michal Hocko
2016-04-22 23:01 ` Timothy Normand Miller [this message]
2016-04-22 22:44 ` Timothy Normand Miller
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