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

[Daniel De Graaf <dgdegra@xxxxxxxxxxxxx>]

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>

Attachment: xenbus-rw-deadlock.patch
Description: Text document

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