linux-kernel - NFS woes again Was: [linux-usb-devel] USB-related oops in sysfs with linux v2.6.23-rc3-50-g28e8351

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Message-ID: <20070823125210.GQ10422@iucha.net>
Date:	Thu, 23 Aug 2007 07:52:10 -0500
From:	Florin Iucha <florin@...ha.net>
To:	Trond Myklebust <trond.myklebust@....uio.no>
Cc:	Jiri Kosina <jikos@...os.cz>,
	linux-usb-devel@...ts.sourceforge.net,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Michal Piotrowski <michal.k.k.piotrowski@...il.com>
Subject: NFS woes again Was: [linux-usb-devel] USB-related oops in sysfs
	with linux v2.6.23-rc3-50-g28e8351

Trond,

Fess up... I'm closing in:

   http://iucha.net/2.6.23-rc3/2.6.23-rc-bisect.png

[Dropping Jiri and linux-usb-devel from future postings.  You are
included now just for communicating the conclusion of this thread.]

On Wed, Aug 22, 2007 at 08:22:00AM -0500, Florin Iucha wrote:
> On Tue, Aug 21, 2007 at 03:42:26PM +0200, Jiri Kosina wrote:
> > On Tue, 21 Aug 2007, Florin Iucha wrote:
> > 
> > > There is another interesting angle to this: in the past, every time I 
> > > had keyboard problems, it used to be caused by the VFS and/or NFS... 
> > > after much wrangling, a bunch of bugs were fixed (Hi Trond, Peter, 
> > > Alan!). Now, after the keyboard "locked up", I used the mouse to close 
> > > the gnome session, then I logged-in remotely to reboot.  The reboot 
> > > process locked up and I need to use the reset button!  The second time 
> > > the keyboard "locked up" I listed my processes, and I noticed that I had 
> > > a couple of bash processes and a ssh process in "D" state. Something is 
> > > fishy again in the VFS ;)
> > 
> > Yes, there were some NFS updates in between -rc2 and 
> > 28e8351ac22de25034e048c680014ad824323c65. I'd be now even more curious 
> > what are you going to find by bisect, please let us know.
> > 
> > I added Trond to CC, full thread to be found at 
> > http://lkml.org/lkml/2007/8/21/151 for reference.
> > 
> > Florin, it also might be useful to capture the states of stuck processess 
> > via alt-sysrq-T (or better by echo t > /proc/sysrq-trigger), so that we 
> > know better where are they stuck.
> 
> This morning it took a bit longer to hang, but it happened.  The
> backtraces are at http://iucha.net/2.6.23-rc3/backtraces.gz .
> 
> I'll try a bisect session this weekend.

florin@...s $ git bisect bad
Bisecting: 5 revisions left to test after this
florin@...s $ git bisect log
git-bisect start
# good: [d4ac2477fad0f2680e84ec12e387ce67682c5c13] Linux 2.6.23-rc2
git-bisect good d4ac2477fad0f2680e84ec12e387ce67682c5c13
# bad: [28e8351ac22de25034e048c680014ad824323c65] Merge git://git.kernel.org/pub/scm/linux/kernel/git/steve/gfs2-2.6-fixes
git-bisect bad 28e8351ac22de25034e048c680014ad824323c65
# bad: [8f2ea1fd3f97ab7a809e939b5b9005a16f862439] [POWERPC] Fix initialization and usage of dma_mask
git-bisect bad 8f2ea1fd3f97ab7a809e939b5b9005a16f862439
# good: [ff95f3df54609d9d4b9572f8a67d09922a645043] sched: remove the 'u64 now' parameter from pick_next_task()
git-bisect good ff95f3df54609d9d4b9572f8a67d09922a645043
# good: [be12014dd7750648fde33e1e45cac24dc9a8be6d] Merge git://git.kernel.org/pub/scm/linux/kernel/git/mingo/linux-2.6-sched
git-bisect good be12014dd7750648fde33e1e45cac24dc9a8be6d
# good: [6a0ed91e361a93ee1efb4c20c4967024ed2a8dd7] hexdump: use const notation
git-bisect good 6a0ed91e361a93ee1efb4c20c4967024ed2a8dd7
# bad: [6adb31c90c47262c8a25bf5097de9b3426caf3ae] remove dubious legal statment from uio-howto
git-bisect bad 6adb31c90c47262c8a25bf5097de9b3426caf3ae

florin

-- 
Bruce Schneier expects the Spanish Inquisition.
      http://geekz.co.uk/schneierfacts/fact/163

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