Comment 7 for bug 601299

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James Lewis (james-fsck) wrote : Re: maverick btrfs slow install

I've found reference to what I believe is this issue on the BTRFS mailing list... it seems that there may be a significant performance regression in certain configurations, but Chris Mason has identified the cause, and it should be patched... the issue for many of us of course is that Maverick is frozen on the 2.6.35 kernel and so if this is the issue, we may not see a fix before 2.6.36 unless canonical backport it, which may not happen since it's not officially supported... :(

I have posted a link to this bug to the btrfs mailing list thread to confirm that the problem is not just theoretical:-