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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@tycho.nsa.gov> commit e752969f502a511e83f841aa01d6cd332e6d85a0 Author: Daniel De Graaf <dgdegra@tycho.nsa.gov> Date: Tue Sep 7 11:21:52 2010 -0400 xenbus: fix deadlock in concurrent read/write 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. Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> |
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xenbus | ||
xenfs | ||
balloon.c | ||
cpu_hotplug.c | ||
events.c | ||
evtchn.c | ||
features.c | ||
grant-table.c | ||
Kconfig | ||
Makefile | ||
manage.c | ||
sys-hypervisor.c | ||
xencomm.c |