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mirror of https://github.com/edk2-porting/linux-next.git synced 2024-12-23 20:53:53 +08:00
linux-next/drivers/xen
Daniel De Graaf 76ce7618f9 xenbus: add missing wakeup 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. 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>
2010-09-08 23:18:02 +10:00
..
xenbus xenbus: do not hold transaction_mutex when returning to userspace 2009-11-03 14:35:59 -08:00
xenfs xenbus: add missing wakeup in concurrent read/write 2010-09-08 23:18:02 +10:00
balloon.c [IA64] xen_domu_defconfig: fix build issues/warnings 2009-05-05 11:43:13 -07:00
cpu_hotplug.c xen: honour VCPU availability on boot 2009-04-08 14:25:51 -07:00
events.c xen: Use kcalloc() in xen_init_IRQ() 2009-07-01 11:19:47 +02:00
evtchn.c xen/dev-evtchn: clean up locking in evtchn 2009-03-30 09:26:49 -07:00
features.c xen: clean up asm/xen/hypervisor.h 2008-12-16 21:50:31 +01:00
grant-table.c xen: clean up asm/xen/hypervisor.h 2008-12-16 21:50:31 +01:00
Kconfig Merge commit 'origin/master' into for-linus/xen/master 2009-04-07 13:34:16 -07:00
Makefile Merge branches 'for-linus/xen/dev-evtchn', 'for-linus/xen/xenbus', 'for-linus/xen/xenfs' and 'for-linus/xen/sys-hypervisor' into for-linus/xen/master 2009-03-30 10:00:45 -07:00
manage.c PM core: rename suspend and resume functions 2009-06-12 21:32:31 +02:00
sys-hypervisor.c xen: drop kexec bits from /sys/hypervisor since kexec isn't implemented yet 2009-03-30 09:27:07 -07:00
xencomm.c xen: portability clean up and some minor clean up for xencomm.c 2008-10-23 21:54:36 +02:00