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    SubjectRe: How many people are using 2.6.16?
    On Wed, Jan 31, 2007 at 08:02:37AM +0100, Adrian Bunk wrote:
    > On Tue, Jan 30, 2007 at 06:36:48PM -0800, Linus Torvalds wrote:
    > > The issue was somewhat confused by people certainly *reporting* it for
    > > older kernels. Also, as part of the dirty bit cleanups and sanity
    > > checkingwe did actually seem to fix a long-standing CIFS corruption (and
    > > apparently reisertfs/XFS problems too).
    > >
    > > But the *common* case was actually introduced with 2.6.19, and 2.6.16
    > > wouldn't be affected.
    >
    > Thanks for the clarifications.
    >
    > Regarding the longstanding CIFS/reiserfs/XFS problems, it seems the
    > status is:
    ....
    > XFS:
    > fix not yet in your tree

    With the WARN_ON() in cancel_dirty_page() removed:

    http://git2.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commitdiff;h=ecdfc9787fe527491baefc22dce8b2dbd5b2908d

    XFS will behave exactly the same as 2.6.19 and previous releases.
    The patches I sent were only ever really workarounds to greatly
    reduce the race window that could lead to the warning being
    triggered.

    We really need Nick Piggin's invalidate/truncate/mmap race fixes to
    properly solve the XFS issues uncovered by Linus' changes. Given
    that we haven't had any reported cases of data corruption on XFS
    (and I couldn't trigger any even when seeing the warnings) I think
    we are fairly safe just maintaining the status quo and waiting the
    right fix to make it's way into the tree....

    Cheers,

    Dave.
    --
    Dave Chinner
    Principal Engineer
    SGI Australian Software Group
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