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Message-ID: <20080317072324.GX17940@kernel.dk> Date: Mon, 17 Mar 2008 08:23:25 +0100 From: Jens Axboe <jens.axboe@...cle.com> To: Bartlomiej Zolnierkiewicz <bzolnier@...il.com> Cc: Linus Torvalds <torvalds@...ux-foundation.org>, Anders Eriksson <aeriksson@...tmail.fm>, "Rafael J. Wysocki" <rjw@...k.pl>, Ingo Molnar <mingo@...e.hu>, Linux Kernel Mailing List <linux-kernel@...r.kernel.org> Subject: Re: Linux 2.6.25-rc4 On Sun, Mar 16 2008, Bartlomiej Zolnierkiewicz wrote: > On Sunday 16 March 2008, Bartlomiej Zolnierkiewicz wrote: > > [...] > > > I think that we are looking into completely wrong direction... > > Alt-SysRq-T traces that Anders posted shows that the system hangs inside > block layer, if not clearing DRQ would be the case we should see system > getting stuck inside IDE (or at least IDE commands timing out)... The bisect ends up pointing at IDE bits everytime, plus it's io scheduler independent. So I don't think a generic issue is very likely. > I really do think that it is the same hang-in-block-layer issue that > Ingo managed to hit once (his system was using libata)... There's no data to back any such conclusion up, that would be extremely hand wavy (at best). Ingo hit a hang in one boot out of hundreds to thousands. Anders can reproduce easily, should be easy enough to narrow down. -- Jens Axboe -- 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/
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