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Date: Thu, 8 Mar 2007 21:47:23 +0200
From: "Michael S. Tsirkin" <mst@mellanox.co.il>
To: Ingo Molnar <mingo@elte.hu>
Cc: Linus Torvalds <torvalds@linux-foundation.org>,
       Adrian Bunk <bunk@stusta.de>, Andrew Morton <akpm@linux-foundation.org>,
       Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
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       linux-input@atrey.karlin.mff.cuni.cz,
       "Eric W. Biederman" <ebiederm@xmission.com>
Subject: Re: [2/6] 2.6.21-rc2: known regressions
Message-ID: <20070308194723.GF17114@mellanox.co.il>
Reply-To: "Michael S. Tsirkin" <mst@mellanox.co.il>
References: <Pine.LNX.4.64.0702272105220.12485@woody.linux-foundation.org> <20070305015034.GG3441@stusta.de> <20070308123143.GF5149@mellanox.co.il> <Pine.LNX.4.64.0703080954220.10832@woody.linux-foundation.org> <20070308190642.GA30517@elte.hu>
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> Quoting Ingo Molnar <mingo@elte.hu>:
> Subject: Re: [2/6] 2.6.21-rc2: known regressions
> 
> 
> * Linus Torvalds <torvalds@linux-foundation.org> wrote:
> 
> > > 3. When I switch to X (CTRL-ALT-F7), X hangs after drawing a couple of windows
> > >    after waiting for some 10 min, I rebooted. no new messages showed 
> > >    up in /var/log/messages
> > 
> > I think this is likely just more of the disk being buggered, but it 
> > could again be related to NO_HZ (people report time not advancing, and 
> > that would make any X timeout taking forever, and you'd see exactly 
> > your behaviour).
> 
> Michael - does your 'date' output advance after resume? If not then i'd 
> say it's a NO_HZ related problem. If yes then i'd guess it's the SATA 
> problem.

I'll test, but I have NO_HZ off for now.

-- 
MST