On Mon, Jul 25, 2011 at 08:20:37PM +0200, Jörn Engel wrote: > On Mon, 25 July 2011 11:18:25 -0400, Ted Ts'o wrote: > > > > Did you have a chance to do an ext4 lockstat run? Hi Jörn, Thanks for forwarding it to me. It's the same problem as in XFS, the excessive coverage of the i_mutex lock. In ext4's case, it's in the generic generic_file_aio_write() machinery where we need to do the lock busting. (XFS apparently doesn't use the generic routines, so the fix that Dave did won't help ext3 and ext4.) I don't have the time to look at it now, but I'll put it on my todo list; or maybe someone with a bit more time can look into how we might be able to use a similar approach in the generic file system code. - Ted -- To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
