Hi Jörn and Ted, Could you anyone send out the ext4 lock stat on the list? Thank you, Yongqiang. On Tue, Jul 26, 2011 at 10:57 PM, Ted Ts'o <tytso@xxxxxxx> wrote: > 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-ext4" in > the body of a message to majordomo@xxxxxxxxxxxxxxx > More majordomo info at http://vger.kernel.org/majordomo-info.html > -- Best Wishes Yongqiang Yang -- 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
