> -----Ursprüngliche Nachricht----- > Von: Jens Axboe [mailto:[EMAIL PROTECTED] > Gesendet: Montag, 11. Dezember 2006 17:12 > An: Ross S. W. Walker > Cc: [EMAIL PROTECTED]; [email protected]; > [EMAIL PROTECTED] > Betreff: Re: how to explain this? > > On Mon, Dec 11 2006, Ross S. W. Walker wrote: > > > > So the only way to assure order with bio is use of BIO_RW_BARRIER? > > (don't top post) > > The answer is yes. We probably could split the BIO_RW_BARRIER to only > provide io scheduler ordering like the REQ_SOFTBARRIER does for > requests. So far there hasn't been a use for it. >
Dumb question: It is possible that a request to block A outruns a request to block B. But is it also possible that a read request to block A outruns a write request to block A? Isn't there any kind of checking inside the elevator algorithms? André > -- > Jens Axboe - To unsubscribe from this list: send the line "unsubscribe linux-btrace" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html
