From: Frederic Weisbecker Date: Mon, 7 Feb 2022 15:59:04 +0000 (+0100) Subject: workqueue: Decouple HK_FLAG_WQ and HK_FLAG_DOMAIN cpumask fetch X-Git-Tag: v6.6.17~7964^2~35 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=7b45b51e778021cd7817b8f0d743a2c73205c011;p=platform%2Fkernel%2Flinux-rpi.git workqueue: Decouple HK_FLAG_WQ and HK_FLAG_DOMAIN cpumask fetch To prepare for supporting each feature of the housekeeping cpumask toward cpuset, prepare each of the HK_FLAG_* entries to move to their own cpumask with enforcing to fetch them individually. The new constraint is that multiple HK_FLAG_* entries can't be mixed together anymore in a single call to housekeeping cpumask(). This will later allow, for example, to runtime modify the cpulist passed through "isolcpus=", "nohz_full=" and "rcu_nocbs=" kernel boot parameters. Signed-off-by: Frederic Weisbecker Signed-off-by: Peter Zijlstra (Intel) Reviewed-by: Juri Lelli Reviewed-by: Phil Auld Acked-by: Tejun Heo Link: https://lore.kernel.org/r/20220207155910.527133-3-frederic@kernel.org --- diff --git a/kernel/workqueue.c b/kernel/workqueue.c index 33f1106..61ed310 100644 --- a/kernel/workqueue.c +++ b/kernel/workqueue.c @@ -6006,13 +6006,13 @@ static void __init wq_numa_init(void) void __init workqueue_init_early(void) { int std_nice[NR_STD_WORKER_POOLS] = { 0, HIGHPRI_NICE_LEVEL }; - int hk_flags = HK_FLAG_DOMAIN | HK_FLAG_WQ; int i, cpu; BUILD_BUG_ON(__alignof__(struct pool_workqueue) < __alignof__(long long)); BUG_ON(!alloc_cpumask_var(&wq_unbound_cpumask, GFP_KERNEL)); - cpumask_copy(wq_unbound_cpumask, housekeeping_cpumask(hk_flags)); + cpumask_copy(wq_unbound_cpumask, housekeeping_cpumask(HK_FLAG_WQ)); + cpumask_and(wq_unbound_cpumask, wq_unbound_cpumask, housekeeping_cpumask(HK_FLAG_DOMAIN)); pwq_cache = KMEM_CACHE(pool_workqueue, SLAB_PANIC);