[Bug 601299] Re: maverick btrfs slow install

[Rocko]

The patch posted by Chris Mason on the btrfs mailing list
http://news.gmane.org/gmane.comp.file-systems.btrfs (patch attached)
makes a huge difference on my Maverick VM.

My test case was to turn off the host SATA cache for the VM and then
install a hefty package (netbeans in this case). atop showed avio maxing
out at 2ms during the install compared to the 20-30ms I was seeing with
the stock kernel.

** Patch added: "slowbtrfsfix-patch.diff"
   https://bugs.launchpad.net/ubuntu/+source/linux/+bug/601299/+attachment/1506559/+files/slowbtrfsfix-patch.diff

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maverick btrfs slow install
https://bugs.launchpad.net/bugs/601299
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