on 30/09/2010 20:46 Alexander Motin said the following: > Andriy Gapon wrote: >> on 30/09/2010 01:28 Matthew Jacob said the following: >>> If something like that was in place, I assure you that things would start >>> to use >>> it very quickly. >> >> I am not sure about this. >> Because, e.g. I don't see an easy way to know that media is changed in >> scsi_cd >> driver. That is, without polling. I don't consider polling to be an easy >> way for >> a number of reasons. > > SATA specification defines concept of Asynchronous Notification. It is > already used by port multipliers to report about PHY events. It is also > supposed to be used by CD drives to report media change. I haven't seen > such devices yet, but hope they may appear sometimes.
Would this require some reverse-path from SIM driver to peripheral driver to deliver a notification? Do we have one? > And even without AN support it would be nice to implement proper > handling for SCSI "UA - media changed" errors within CAM. It still won't > be perfect without using polling, but probably still something. I agree. -- Andriy Gapon _______________________________________________ [email protected] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-current To unsubscribe, send any mail to "[email protected]"
