I can report that the proposed kernel resolves what is either this issue or a closely related issue. On our Ubuntu 10.04 machines, unmounting an NFS filesystem takes a significant amount of time, on the order of several seconds to tens of seconds; my test machine runs between 15 seconds and 25 seconds per filesystem. This happens even with a 'sync' run immediately before the unmount.
(This happens on both 2.6.32-24-generic-pae i686 and 2.6.32-24-server x86_64. One unpleasant consequence is that shutting down a machine takes a very long time, as we have more than 200 NFS mounts and the shutdown scripts do the unmounts serially.) The proposed kernel solves the problem on at least x86_64; unmounting a NFS filesystem is almost instant (time says 0.16 seconds real) and the machine shuts down or reboots immediately when requested. -- Unmount of an fs with dirty cache buffers causes pathological slowdown https://bugs.launchpad.net/bugs/543617 You received this bug notification because you are a member of Registry Administrators, which is the registrant for Fedora. _______________________________________________ Mailing list: https://launchpad.net/~registry Post to : [email protected] Unsubscribe : https://launchpad.net/~registry More help : https://help.launchpad.net/ListHelp
