linux-kernel - Re: kswapd craziness in 3.7

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20121205030133.GA17438@wolff.to>
Date:	Tue, 4 Dec 2012 21:01:33 -0600
From:	Bruno Wolff III <bruno@...ff.to>
To:	Johannes Weiner <hannes@...xchg.org>
Cc:	Thorsten Leemhuis <fedora@...mhuis.info>,
	Mel Gorman <mgorman@...e.de>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Rik van Riel <riel@...hat.com>,
	George Spelvin <linux@...izon.com>,
	Johannes Hirte <johannes.hirte@....tu-ilmenau.de>,
	Tomas Racek <tracek@...hat.com>, Jan Kara <jack@...e.cz>,
	Dave Hansen <dave@...ux.vnet.ibm.com>,
	Josh Boyer <jwboyer@...il.com>,
	Valdis Kletnieks <Valdis.Kletnieks@...edu>,
	Jiri Slaby <jslaby@...e.cz>,
	Zdenek Kabelac <zkabelac@...hat.com>,
	linux-mm <linux-mm@...ck.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	John Ellson <john.ellson@...cast.net>
Subject: Re: kswapd craziness in 3.7

On Tue, Dec 04, 2012 at 16:42:10 -0500,
   Johannes Weiner <hannes@...xchg.org> wrote:
>  kernel-3.7.0-0.rc7.git1.2.van.main.knurd.kswap.4.fc18.i686
>and
>  kernel-3.7.0-0.rc7.git1.2.van.main.knurd.kswap.4.fc18.x86_64
>for over 24hours with no evidence of problems with kswapd"
>
>Now waiting for results from Jiri, Zdenek and Bruno...

I have been running 3.7.0-0.rc7.git1.2.van.main.knurd.kswap.4.fc18.i686.PAE 
a bit over 23 hours and kswapd has accumalated one minute 8 seconds of 
CPU time. I did several yum operations during that time and didn't see 
kswapd spike to 90+% CPU usage as I had seen in the past. With some kernels 
I wasn't reliably triggering the kswapd issue, so it may not be long enough 
to know for sure that the problem is fixed.

I also should note that when I tried 3.7.0-0.rc7.git3.2.fc19.i686.PAE I 
did see problems with kswapd hitting 90+% usage of a CPU.
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/