On Wed, Oct 07, 2009 at 10:26:32PM +0800, Theodore Ts'o wrote: > On Wed, Oct 07, 2009 at 03:38:18PM +0800, Wu Fengguang wrote: > > > > The estimated writeback bandwidth is about 1/2 the real throughput > > for ext2/3/4 and btrfs; noticeable bigger than real throughput for NFS; and > > cannot be estimated at all for XFS. Very interesting.. > > Can you expand on what you mean here? Estimated write bandwidth of > what? And what are you comparing it against? Please refer to [PATCH 21/45] writeback: estimate bdi write bandwidth and patch 22, I have some numbers there :) > I'm having trouble understanding your note (which I'm guessing you > write fairly late at night? :-) Sorry - I wrote that when I got tired on debugging ;) Thanks, Fengguang -- 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
