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[Xen-devel] Re: First post-xenbus-change USB patch
| To: | harry <harry@xxxxxxxxxxxxxxxxxxxxxxxxxxxxx> |
|---|---|
| Subject: | [Xen-devel] Re: First post-xenbus-change USB patch |
| From: | Ewan Mellor <ewan@xxxxxxxxxxxxx> |
| Date: | Tue, 15 Nov 2005 15:37:48 +0000 |
| Cc: | xen-devel@xxxxxxxxxxxxxxxxxxx |
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On Tue, Nov 15, 2005 at 03:23:21PM +0000, harry wrote:
> I'd like the otherend_changed entrypoint to be optional please.
No problem. I'm sure you could whizz up a patch for us.
> I did a quick bit of testing and managed to mount the USB key again etc
> but had a few problems with module unload and reload. I think I maybe
> got hit by the unregister_watch deadlock then
Yes, we really need to address that one. The code says
/* Flush any currently-executing callback, unless we are it. :-) */
(IIRC, that's the deadlock point that Rusty highlighted) but I don't really
know what this means. Can you shed some light here on what we ought to be
doing?
> after I killed the FE domain, the new xenbus code gave an error message when
> I tried to unload and reload the BE.
Which error message?
Cheers,
Ewan.
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