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    SubjectRe: 2.6.20-rc1-mm1
    On Fri, 15 Dec 2006 21:39:36 +0100
    Damien Wyart <damien.wyart@free.fr> wrote:

    > With this new kernel, I notice two messages I do not have with
    > 2.6.19-rc6-mm2 :
    >
    > Dec 15 20:00:47 brouette kernel: Filesystem "sdb9": Disabling barriers,trial barrier write failed
    > Dec 15 20:00:47 brouette kernel: Filesystem "sda5": Disabling barriers,trial barrier write failed
    >
    > Nothing changed in the config between the two, and going back to
    > 2.6.19-rc6-mm2 do not give the messages.

    I don't think anything has changed in this area in XFS. I'd expect that
    something got broken in sata, ata_piix or the block core which caused the
    "trial barrier write" to start failing. Various cc's hopefully added.

    > Also, I got panics when unmounting reiser4 filesystems with
    > 2.6.20-rc1-mm1 but I guess this is related to your waring about reiser4
    > being broken in 2.6.19-mm1 (even if it is not listed in notes for
    > 2.6.20-rc1-mm1)... I attach dmesg and config, but the reiser4 panics did
    > not get logged and I am not able to reboot on 2.6.20-rc1-mm1 right now.
    > For the moment, I mainly wanted to report the xfs messages which seems
    > a bit suspect.

    The reiser4 failure is unexpected. Could you please see if you can capture
    a trae, let the people at reiserfs-dev@namesys.com know?

    Thanks.
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