Hi. On Wed, Oct 07, 2009 at 03:38:27PM +0800, 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. I have no objections against this patchset, since I followed the upstream writeback behaviour and did not personally observe such wraps which would be otherwise handled in a single run. > CC: Evgeniy Polyakov <zbr@xxxxxxxxxxx> > Signed-off-by: Wu Fengguang <fengguang.wu@xxxxxxxxx> -- Evgeniy Polyakov -- 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
