Re: [PATCH] sd: do not set changed flag on all unit attention conditions

From: Paolo Bonzini
Date: Tue Jul 17 2012 - 17:12:25 EST

Il 17/07/2012 20:49, Mike Christie ha scritto:
> > Not sure if we are talking about the same thing.
> >
> > So can virtio-scsi send a UA with asc/ascq that indicates the lun
> > changed size? Other drivers do this. I updated Hannes's patches the
> > other day to support UAs like those in userspace.
> >
> > I just saw the code in the patch where virtio-scsi gets that event.
> Was not done. I meant I saw that patch where virtio-scsi gets that
> virtio_scsi_event and kicks of a rescan based off of that.

Yes, it sends both (event + UA). Right now Linux ignores the UA, and I
wanted virtio-scsi to match real hardware as much as possible so I
copied what aacraid does. The event also has the advantage over UA that
it the revalidate is done immediately, not the next time the unit is

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