tree 8c4bcbc4348c473b14644dc4d371a45c0dabda53
parent 7def2be1dc679984f4c4fb3ef19a8a081b2454ec
author David Rientjes <rientjes@google.com> 1212695831 -0700
committer Ingo Molnar <mingo@elte.hu> 1213093576 +0200

sched: prevent bound kthreads from changing cpus_allowed

Kthreads that have called kthread_bind() are bound to specific cpus, so
other tasks should not be able to change their cpus_allowed from under
them.  Otherwise, it is possible to move kthreads, such as the migration
or software watchdog threads, so they are not allowed access to the cpu
they work on.

Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Paul Menage <menage@google.com>
Cc: Paul Jackson <pj@sgi.com>
Signed-off-by: David Rientjes <rientjes@google.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>