revert work-around for bug 543617 please
On Tue, May 04, 2010 at 11:57:19AM -0700, Kees Cook wrote:
> I think that 5e1941884c700b7b97bcad52c2d8212ac56a7ebc is causing more
> problems than it tries to solve. i.e. if any filesystem is under heavy
> load, you can't umount any other filesystems until the sync finishes.
> Additionally, trivial stuff (even with an idle system) take an unexpectedly
> long time (e.g. umount of a bind mount takes 1 second instead of nearly 0).
> Try this in Karmic and Lucid:
> sudo -s
> mkdir -p /mnt/test
> mount -o bind /tmp /mnt/test
> time umount /mnt/test
> Karmic: real 0m0.010s
> Lucid: real 0m1.022s
>  https://bugs.launchpad.net/ubuntu/+source/linux/+bug/543617
I believe Surbhi is now testing a potential upstream fix. If that
testing is good, then we would clearly revert and replace it. I am
therefore inclined to wait on that testing, rather than jump the SRU
Otherwise it does appear that this has a not so healthy side.
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