On Fri, Aug 18, 2017 at 11:54:02AM -0600, Liu Bo wrote: > While we submit direct writes, if the inode is flagged with nodatasum, > there's no benefit to submit asynchronously, because > > a) we don't have to calculate checksum across processors, > > b) and direct IO has started a plug, but async submit makes us queue > IO on each device's scheduled IO list instead of DIO's plug list, so > that IOs get much less merges in general. > > Lets use sync submit for nodatasum inodes. > > Signed-off-by: Liu Bo <bo.li.liu@xxxxxxxxxx> Reviewed-by: Josef Bacik <jbacik@xxxxxx> Thanks, Josef -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
