On Thu, Jun 02, 2011 at 10:17:16AM -0400, Vivek Goyal wrote: > On Thu, Jun 02, 2011 at 11:22:09AM +1000, Dave Chinner wrote: > > On Wed, Jun 01, 2011 at 05:50:49PM -0400, Vivek Goyal wrote: > > > Hi, > > > > > > If I throttle a DIO/AIO WRITE bio at block device in a cgroup, will it > > > lead to any kind of serialization of ext4 file system. IOW, is there any > > > filesystem operation which will wait for that DIO/AIO WRITE to finish > > > before other filesystem can make progress (fsync, journalling etc?) > > > > Truncate? > > > > (XFS explicitly serialises truncate against in flight DIO, > > regardless of whether ext4 does.) > > > > Dave, > > Does this serialization happens against that particular inode on which > truncate has been called? If yes, then I think I will still be fine > as in common use case I am not expecting much sharing of inodes across > cgroups. Same inode serialisation only. Cheers, Dave. -- Dave Chinner david@xxxxxxxxxxxxx -- To unsubscribe from this list: send the line "unsubscribe linux-ext4" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
