On Thu, Jul 29, 2010 at 03:44:31PM -0400, Ric Wheeler wrote: > I confess that I am a bit fuzzy on FUA, but think that it means that any > FUA tagged IO will go down to persistent store before returning. Exactly. > If so, then all order dependent IO would need to be issued in order and > tagged with FUA. It would not suffice to tag just the commit record as > FUA, or do I misunderstand what FUA does? The commit record is ext3/4 specific terminalogy. In xfs we just have one type of log buffers, and we could tag that as FUA. There is very little other depenent I/O, but if that is present we need a pre-flush for it anyway. -- To unsubscribe from this list: send the line "unsubscribe linux-scsi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
