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    SubjectRe: 2.6.20-rc1-mm1
    On Fri, Dec 15 2006, Andrew Morton wrote:
    > 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.

    There hasn't been any barrier changes lately (or block layer handling of
    such), so I don't think it's in that area. I'll do some barrier testing
    today to verify that things work for me.

    --
    Jens Axboe

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