Where is your dev tree located? I've checked your website on
people.sistina.com and the various Sistina CVS trees, but I can't really find
anything (regarding suspend and resume target methods) that's very recent. Do
you have another ftp server somewhere?
> > 2) Removing suspended devices. The current code (2.5.70) does not allow a
> > suspended device to be removed/unlinked from the ioctl interface, since
> > removing it would leave you with no way to resume it (and hence flush any
> > pending I/Os).
> I think removing a device that has deferred io against it should not
> be possible, since it can only be in that state if the device is open.
> We shouldn't start ripping devices out from under people.
So are you saying it would be alright to remove a suspended device that has no
pending I/O or isn't open? If so, the current code (in 2.5.70) doesn't seem
to coordinate the removal of such a device with another process trying to
open it or submit new I/O. Some new locking of the device would be necessary
to prevent a device which is being removed from being opened at the same
Sorry if it sounds like I'm harping on this issue - I don't mean to. :) Just
interested in the details behind some of the proposed changes and some of the
affects the changes might have. It will probably be much easier to just wait
to see your new code, which will definitively answer these questions.
> The one place where we do want to do this is for the DM_REMOVE_ALL
> ioctl cmd. Which is really an emergency panic button. I'll just
> error any deferred io in this case.
Ok, this seems reasonable.
-- Kevin Corry email@example.com http://evms.sourceforge.net/
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