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    SubjectRe: still nfs problems [Was: Linux 2.6.37-rc8]
    Hi Russell,

    On Wed, Jan 05, 2011 at 11:27:01AM +0000, Russell King - ARM Linux wrote:
    > On Wed, Jan 05, 2011 at 12:05:17PM +0100, Uwe Kleine-König wrote:
    > > Hello Trond,
    > >
    > > On Wed, Jan 05, 2011 at 09:40:14AM +0100, Uwe Kleine-König wrote:
    > > > On Mon, Jan 03, 2011 at 07:22:38PM -0500, Trond Myklebust wrote:
    > > > > The question is whether this is something happening on the server or the
    > > > > client. Does an older client kernel boot without any trouble?
    > > > I will set up a boot test with 2.6.37 (for statistics) and 2.6.36 to
    > > > compare with. If you don't consider .36 to be old enough let me now.
    > > > Once the setup is done it should be easy to test .35 (say), too.
    > > >
    > > Marc (cc'd) saw similar[1] problems with .37, when using .36.2 the
    > > problems didn't occur. This was more reliable to trigger and he was so
    > > kind to bisect the problem.
    > >
    > > When testing v2.6.36-rc3-51-gafa8ccc init hanged.
    > > (babddc72a9468884ce1a23db3c3d54b0afa299f0 is the first bad commit with
    > > this hang.) Commit 56e4ebf877b6043c289bda32a5a7385b80c17dee makes the
    > > "init hangs" problem the "fileid changed on tab" problem.
    > >
    > > I could only reproduce that on armv5 machines (imx27, imx28 and at91)
    > > but not on armv6 (imx35).
    >
    > FYI, I've seen the "fileid changed" problem, and it looked like a 32-bit
    > truncation of the fileid. It occurred several times on successive
    > reboots, so I tried to capture a tcpdump trace off the server (Linux
    > 2.6.23-rc8-ga64314e6 - its ancient because I've had issues with buggy
    > IDE drivers trying to move it forward.) However, for the last couple
    > of weeks I've been unable to reproduce it.
    >
    > The client was based on 2.6.37-rc6.
    >
    > The "fileid changed" messages popped up after mounting an export with
    > 'nolock,intr,rsize=4096,soft', and then trying to use bash completion
    > and 'ls' in a few subdirectories - and entries were missing from the
    > directory lists without 'ls' reporting any errors (which I think is bad
    > behaviour in itself.)
    There was a bug in at least -rc5[1] that was considered already fixed in
    -rc4[2]. The later announcements didn't mention it anymore.

    > I don't know why it's stopped producing the errors, although once it
    > went I never investigated it any further (was far too busy trying to
    > get AMBA DMA support working.)
    It seems it was fixed for most users though. Trond?

    Uwe

    [1] http://lwn.net/Articles/418963/
    [2] http://lwn.net/Articles/417704/
    --
    Pengutronix e.K. | Uwe Kleine-König |
    Industrial Linux Solutions | http://www.pengutronix.de/ |
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