On 29 Aug, Jon Dama wrote: > It seems you need to add a layer of indirection. (owing to biodone being > called merely when the drive has cached the request). What you know is > that those operations marked completed by biodone are in fact done only > after a (costly) flush cache operation is executed. > > Therefore you want to delay this operation for as long as possible, in > fact until you actually depend on biodone being honest. I.e., at the time > another operation is inserted into the WORKLIST. > > The secret I think is to keep track of which bp's marked B_DONE by > biodone that have been certified by a flush cache. Thus permitting you to > avoid some cache flushes. Furthermore, the softdep code has to be > responsible for envoking the flush cache operation when it notices that > the B_DONE flag that it cares about does not have a matching > B_REALLY_DONE flag, which every block should have that had B_DONE set > before the flush cache operation happened.
I believe you are correct. _______________________________________________ freebsd-stable@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-stable To unsubscribe, send any mail to "[EMAIL PROTECTED]"
