Re: [Qemu-devel] Locking block devices for concurrent access?

[Michael Tokarev]

22.04.2010 23:21, Richard W.M. Jones wrote:
> On Thu, Apr 22, 2010 at 01:36:30PM -0500, Anthony Liguori wrote:
> > I think we got to the point where there was general agreement on the
> > usefulness of lock=read|write but where there was still some contention
> > was on this whole notion of lock=exclusive|shared.

For that, there's a good reply by Daniel P. Berrange, there:
http://marc.info/?l=qemu-devel&m=126018305619696&w=2

>  From the libguestfs point of view, any sort of locking would be
> preferable to the current situation.  If someone wants to run with the
> patch, I posted several versions and there was a lot of discussion on
> qemu-devel in Nov/Dec 2009, starting with this message:
>
>    Subject: [Qemu-devel] [PATCH] Disk image shared and exclusive locks.
>    Message-ID:<address@hidden>

Aha, this is the discussion I were trying to find, but failed for
some unknown reason.  Thank you Richard, I'm rehashing it all now...

/mjt