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[Xen-devel] [PATCH] xenbus: add missing wakeup in concurrent read/write
| To: | xen-devel <xen-devel@xxxxxxxxxxxxxxxxxxx> |
|---|---|
| Subject: | [Xen-devel] [PATCH] xenbus: add missing wakeup in concurrent read/write |
| From: | Daniel De Graaf <dgdegra@xxxxxxxxxxxxx> |
| Date: | Tue, 07 Sep 2010 11:42:18 -0400 |
| Delivery-date: | Tue, 07 Sep 2010 08:43:24 -0700 |
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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>
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