On Wed, 21 Apr 2010 19:51:49 +1000 ronnie sahlberg <ronniesahlberg@xxxxxxxxx> wrote: > It would also be very useful to tell tgtd to use either or both of > O_SYNC/O_DIRECT for all i/o depending on the semantics of the > filesystem used to hos the lun files. tgt opens a file with just O_LARGEFILE. If you enable the writeback cache (on the target or initiator), tgt issues write and sync_file_range system calls. WCE bit can be changed at runtime, so I'm not sure using O_SYNC for the writeback cache. About O_DIRECT, what's the advantage of using O_DIRECT? Note that you configure tgt to use AIO, tgts uses O_LARGEFILE|O_DIRECT. -- To unsubscribe from this list: send the line "unsubscribe stgt" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
