From d097c0240ae8085dd39aa6ca9bd9960969b2b38e Mon Sep 17 00:00:00 2001 From: Frederic Weisbecker Date: Wed, 9 Sep 2015 15:38:16 -0700 Subject: [PATCH] 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 Cc: Rik van Riel Reviewed-by: Oleg Nesterov Cc: Christoph Lameter Cc: Tejun Heo Cc: Rusty Russell Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- kernel/kmod.c | 3 --- 1 file changed, 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(¤t->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. -- 2.20.1