linux-kernel - Re: [2/6] 2.6.21-rc2: known regressions

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Message-ID: <20070308190642.GA30517@elte.hu>
Date:	Thu, 8 Mar 2007 20:06:42 +0100
From:	Ingo Molnar <mingo@...e.hu>
To:	Linus Torvalds <torvalds@...ux-foundation.org>
Cc:	"Michael S. Tsirkin" <mst@...lanox.co.il>,
	Adrian Bunk <bunk@...sta.de>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Jens Axboe <jens.axboe@...cle.com>,
	Jeff Chua <jeff.chua.linux@...il.com>, pavel@...e.cz,
	linux-pm@...ts.osdl.org, lenb@...nel.org,
	linux-acpi@...r.kernel.org, luming.yu@...el.com,
	Arkadiusz Miskiewicz <arekm@...en.pl>,
	Konstantin Karasyov <konstantin.a.karasyov@...el.com>,
	Greg KH <greg@...ah.com>,
	linux-usb-devel@...ts.sourceforge.net,
	Thomas Meyer <thomas.mey@....de>, Meelis Roos <mroos@...ux.ee>,
	Alexey Starikovskiy <alexey.y.starikovskiy@...ux.intel.com>,
	Janosch Machowinski <jmachowinski@....de>,
	vladimir.p.lebedev@...el.com,
	Ash Milsted <thatistosayiseenem@...ab.com>,
	dmitry.torokhov@...il.com, linux-input@...ey.karlin.mff.cuni.cz,
	"Eric W. Biederman" <ebiederm@...ssion.com>
Subject: Re: [2/6] 2.6.21-rc2: known regressions


* Linus Torvalds <torvalds@...ux-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.

	Ingo
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