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author | David Rientjes <rientjes@google.com> | 2009-04-02 16:57:57 -0700 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2009-04-02 19:04:57 -0700 |
commit | 6d7b2f5f9e88902b19f91d0c8a7ef58a5455f1a2 (patch) | |
tree | 4ad594fcef55ad95424e58c39e10a723d1dcbe4f /kernel/exit.c | |
parent | db7f47cf4805e30decb0841764b21b7c4000f7dc (diff) | |
download | linux-6d7b2f5f9e88902b19f91d0c8a7ef58a5455f1a2.tar.bz2 |
cpusets: prevent PF_THREAD_BOUND tasks from attaching to non-root cpusets
Kthreads that have the PF_THREAD_BOUND bit set in their flags are bound to a
specific cpu. Thus, their set of allowed cpus shall not change.
This patch prevents such threads from attaching to non-root cpusets. They do
not have mempolicies that restrict them to a subset of system nodes and, since
their cpumask may never change, they cannot use any of the features of
cpusets.
The tasks will forever be a member of the root cpuset and will be returned
when listing the tasks attached to that cpuset.
Cc: Paul Menage <menage@google.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Dhaval Giani <dhaval@linux.vnet.ibm.com>
Signed-off-by: David Rientjes <rientjes@google.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'kernel/exit.c')
0 files changed, 0 insertions, 0 deletions