RE: [Xen-devel] [PATCH] xenbus: add missing wakeup in concurrent read/write

["Jun Zhu (Intern)" <Jun.Zhu@xxxxxxxxxx>]

That's right!  Thanks.

Jun Zhu
Citrix Systems UK
________________________________________
From: Jeremy Fitzhardinge [jeremy@xxxxxxxx]
Sent: 07 September 2010 19:34
To: Daniel De Graaf
Cc: xen-devel; Jun Zhu (Intern)
Subject: Re: [Xen-devel] [PATCH] xenbus: add missing wakeup in concurrent 
read/write

 On 09/08/2010 01:42 AM, Daniel De Graaf wrote:
> If an application has a dedicated read thread watching xenbus and
> another thread writes an XS_WATCH message that generates a synthetic
> "OK" reply, this reply will be enqueued in the buffer without waking up
> the reader. This can cause a deadlock in the application if it then
> waits for the read thread to receive the queued message.
>
> Signed-off-by: Daniel De Graaf <dgdegra@xxxxxxxxxxxxx>

Thanks.  Jun Zhu, does this fix the problem you were reporting?

    J

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