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authorFrederic Weisbecker <fweisbec@gmail.com>2015-09-09 15:38:16 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2015-09-10 13:29:01 -0700
commitd097c0240ae8085dd39aa6ca9bd9960969b2b38e (patch)
tree5986975db044124663cadc69809529b87ec9c55e
parentb6b50a814d0ece9c1f98f2b3b5c2a251a5c9a211 (diff)
kmod: remove unecessary explicit wide CPU affinity setting
Khelper is affine to all CPUs. Now since it creates the call_usermodehelper_exec_[a]sync() kernel threads, those inherit the wide affinity. As such explicitly forcing a wide affinity from those kernel threads is like a no-op. Just remove it. It's needless and it breaks CPU isolation users who rely on workqueue affinity tuning. Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com> Cc: Rik van Riel <riel@redhat.com> Reviewed-by: Oleg Nesterov <oleg@redhat.com> Cc: Christoph Lameter <cl@linux.com> Cc: Tejun Heo <tj@kernel.org> Cc: Rusty Russell <rusty@rustcorp.com.au> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-rw-r--r--kernel/kmod.c3
1 files changed, 0 insertions, 3 deletions
diff --git a/kernel/kmod.c b/kernel/kmod.c
index 2d83511e9610..d910b6378fb6 100644
--- a/kernel/kmod.c
+++ b/kernel/kmod.c
@@ -224,9 +224,6 @@ static int call_usermodehelper_exec_async(void *data)
flush_signal_handlers(current, 1);
spin_unlock_irq(&current->sighand->siglock);
- /* We can run anywhere, unlike our parent keventd(). */
- set_cpus_allowed_ptr(current, cpu_all_mask);
-
/*
* Our parent is keventd, which runs with elevated scheduling priority.
* Avoid propagating that into the userspace child.