Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]
Groups > linux.kernel > #1186196
| From | Daniel Bristot de Oliveira <bristot@redhat.com> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | [RFC] workqueue: avoiding unbounded wq on isolated CPUs by default |
| Date | 2015-07-16 21:20 +0200 |
| Message-ID | <pMWRk-7rm-9@gated-at.bofh.it> (permalink) |
| Organization | linux.* mail to news gateway |
By default, unbounded workqueues run on all CPUs, which includes isolated CPUs. This patch avoids unbounded workqueues running on isolated CPUs by default, keeping the current behavior when no CPUs were isolated. Signed-off-by: Daniel Bristot de Oliveira <bristot@redhat.com> --- kernel/workqueue.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/kernel/workqueue.c b/kernel/workqueue.c index 4c4f061..14d17f4 100644 --- a/kernel/workqueue.c +++ b/kernel/workqueue.c @@ -5217,7 +5217,10 @@ static int __init init_workqueues(void) WARN_ON(__alignof__(struct pool_workqueue) < __alignof__(long long)); BUG_ON(!alloc_cpumask_var(&wq_unbound_cpumask, GFP_KERNEL)); - cpumask_copy(wq_unbound_cpumask, cpu_possible_mask); + + /* by default, run unbound wq on non-isolated CPUs */ + cpumask_andnot(wq_unbound_cpumask, cpu_possible_mask, + cpu_isolated_map); pwq_cache = KMEM_CACHE(pool_workqueue, SLAB_PANIC); -- 2.1.0 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Back to linux.kernel | Previous | Next — Next in thread | Find similar | Unroll thread
[RFC] workqueue: avoiding unbounded wq on isolated CPUs by default Daniel Bristot de Oliveira <bristot@redhat.com> - 2015-07-16 21:20 +0200
Re: [RFC] workqueue: avoiding unbounded wq on isolated CPUs by default Tejun Heo <tj@kernel.org> - 2015-07-16 21:30 +0200
Re: [RFC] workqueue: avoiding unbounded wq on isolated CPUs by default Mike Galbraith <umgwanakikbuti@gmail.com> - 2015-07-17 06:30 +0200
Re: [RFC] workqueue: avoiding unbounded wq on isolated CPUs by default Mike Galbraith <umgwanakikbuti@gmail.com> - 2015-07-19 10:10 +0200
Re: [RFC] workqueue: avoiding unbounded wq on isolated CPUs by default Mike Galbraith <umgwanakikbuti@gmail.com> - 2015-07-19 14:20 +0200
[patch] workqueue: schedule WORK_CPU_UNBOUND work on wq_unbound_cpumask CPUs Mike Galbraith <umgwanakikbuti@gmail.com> - 2015-07-22 07:30 +0200
[PATCH] workqueue: avoiding unbounded wq on isolated CPUs by default Daniel Bristot de Oliveira <bristot@redhat.com> - 2015-07-22 14:50 +0200
Re: [patch] workqueue: schedule WORK_CPU_UNBOUND work on wq_unbound_cpumask CPUs Tejun Heo <tj@kernel.org> - 2015-07-22 16:20 +0200
csiph-web