On Wed, Oct 07, 2009 at 11:17:06AM +0100, David Howells wrote: > Wu Fengguang <fengguang.wu@xxxxxxxxx> wrote: > > > Convert wbc.range_cyclic to new behavior: when past EOF, abort writeback > > of the inode, which instructs writeback_single_inode() to delay it for > > a while if necessary. > > > > It removes one inefficient .range_cyclic IO pattern when writeback_index > > wraps: > > submit [10000-10100], (wrap), submit [0-100] > > In which the submitted pages may be consisted of two distant ranges. > > > > It also prevents submitting pointless IO for busy overwriters. > > > > CC: David Howells <dhowells@xxxxxxxxxx> > > Signed-off-by: Wu Fengguang <fengguang.wu@xxxxxxxxx> > > Acked-by: David Howells <dhowells@xxxxxxxxxx> I don't see why. Then the inode is given less write bandwidth than those which don't wrap (or wrap on "nice" boundaries). -- 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
