linux-kernel - Re: Re: i686 hang on boot in userspace

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Message-ID: <f96157c40607250100x3850ffb7g1d2ed300529661f1@mail.gmail.com>
Date:	Tue, 25 Jul 2006 08:00:01 +0000
From:	"gmu 2k6" <gmu2006@...il.com>
To:	"Jens Axboe" <axboe@...e.de>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: Re: i686 hang on boot in userspace

On 7/25/06, Jens Axboe <axboe@...e.de> wrote:
> On Mon, Jul 24 2006, gmu 2k6 wrote:
> > the problem I have with hangs is related to changes in CFQ and that
> > CFQ is now the default. 2.6.17-git12 had the problem but booting
> > it with elevator=deadline fixes the hang.
> >
> > symptoms encountered during git-bisecting between v2.6.17 and v2.6.18-rc1:
> > A hang while starting network services
> > B hang while trying to login
> >   1 on remote console [not SSH] it hang after typing <uid><CR>
> >   1 via OpenSSH it hang after typing <pwd><CR> when doing slogin root@<IP>
> >
> > A is the problem I got in the first place and this seems to be the
> > case since 2.6.17-git11 definitely although git-bisect pointed me at
> > the following
> > changeset which is included since 2.6.17-git12:
> >
> > caaa5f9f0a75d1dc5e812e69afdbb8720e077fd3
> > by Jens Axboe
> > titled "[PATCH] cfq-iosched: many performance fixes"
> >
> > strange enough it also hangs with 2.6.17-git11 which did not include that
> > one changeset yet.
>
> So perhaps your bisect isn't 100% trust worthy? Can you do a manual
> -gitX bisect to see which 2.6.17-gitX introduced the problem?
>
> Also please put a serial console or similar on the machine, so you can
> log + store the sysrq+t output.

well I didn't say that caa....fd3 is the exact change which broke it,
just that it's related to 1) CFQ changes and 2) CFQ being the default
now.
I have a Remote Serial Console via HP's integrated Lights-Out Java
Applet but am not sure how to enable serial console via kernel boot
params (will try to find out).
I will first try to find the 2.6.17-git* revision working before
bisecting it against -git11 or git12.
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