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    SubjectRE: still nfs problems [Was: Linux 2.6.37-rc8]
    On Wed, Jan 05, 2011 at 17:44:16, Marc Kleine-Budde wrote:
    > On 01/05/2011 12:27 PM, 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.
    >
    > We have the problem with nfs-root. From the kernel command line:
    >
    > root=/dev/nfs
    > nfsroot=192.168.23.2:/home/mkl/pengutronix/xxx/bsp/OSELAS.BSP-xxx-Grabowski-trunk/platform-Ronetix-PM9263/root,v3,tcp
    >
    > /home/mkl/pengutronix is a link which points to a link
    > /ptx/work/octopus/mkl (which is a ext3-based) which points to
    > WORK_1/mkl which is also ext3-based.
    >
    > The server is 2.6.32 and has been rebooted yesterday :), nfs-utils are
    > 1.2.2. I make a tcpdump if needed.

    I see the issue too with an ARMv5 based DM355 board with the just released
    v2.6.37 tag (nfs client). I too see the issue when using bash tab completion.

    Here are some logs:

    fileid changed fsid 0:c: expected fileid 0x2db61d, got 0x2dad20

    fileid changed fsid 0:c: expected fileid 0x100000000000, got 0x7070000000000000

    I am using Fedora 8 (2.6.25 kernel) on the server side. I will try the latest
    Ubuntu release on the server side and test.

    Thanks,
    Sekhar

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