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    SubjectRe: unkillable processes using samba, xfs and lvm2 snapshots (k 2.6.10)
    On Tue, Dec 28, 2004 at 12:24:01PM +0100, Gildas LE NADAN wrote:
    > Hi,
    >
    > I experience hangs on samba processes on a filer using xfs over lvm2 as
    > data partitions, when there is active snapshots of the xfs partitions.
    >
    > I have a clone of the production server (same software, same hardware)
    > where the situation can be reproduced perfectly.
    >
    > Testings showed that the result was the same, whether the snapshots were
    > mounted or not : smbd processes are locked and unkillable while the
    > machine is normaly working otherwise, except software reboot is
    > impossible and hardware reset is needed.
    >
    > I noticed Brad Fitzpatrick's case in kernel 2.6.10 changelog
    > (http://lkml.org/lkml/2004/11/14/98) and tested kernel 2.6.10 today
    > without success.
    >
    > Configuration is the following :
    > - supermicro m/b with dual Xeon 2,8Ghz (SMT is active)
    > - 1 GB ram,
    > - adaptec u320 raid controler
    > - kernel 2.6.10
    > - debian sarge
    > - samba 3
    > - LVM2
    > - XFS with quota turned on
    >
    > All software are from debian sarge packages, except the kernel.
    >
    > I'm not able to determine if the problem is more xfs, device mapper or
    > samba related, and was not able to do extensive testings (using a
    > different filesystem, testing with a different daemon, etc...), but
    > SMT/SMP testings showed that this is not a SMP/SMT related problem.
    >
    > I've compiled the kernel with the debugging options, so I might provide
    > additional informations if needed as in Brad's case.

    I'll try to reproduce your problems soon.

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