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    SubjectRe: [GIT PULL] block bits for 3.1-rc
    On Sat, Aug 20, 2011 at 1:41 PM, Christoph Hellwig <hch@infradead.org> wrote:
    > On Fri, Aug 19, 2011 at 03:16:40PM +0200, Jens Axboe wrote:
    >> - Revert of the CFQ meta data special treatment patch, it's been shown
    >>   to regress a kernel build workload by about 10%. More investigation
    >>   is needed, for 3.1 lets just back it out.
    >
    > Sorry, but you can't simply do that without any coordination.  We have
    > added that marker to xfs now that the stupid special casing stopped,
    > and turning it back on will cause us massive slowdows.  Next time
    > please better coordinate this with its users.  In fact I have never
    > seen this patch or a discussion on any mailinglist.

    lkml.org archive doesn't have the full thread for some reason, but here it is:
    http://www.gossamer-threads.com/lists/linux/kernel/1420370
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