lists.openwall.net   lists  /  announce  owl-users  owl-dev  john-users  john-dev  passwdqc-users  yescrypt  popa3d-users  /  oss-security  kernel-hardening  musl  sabotage  tlsify  passwords  /  crypt-dev  xvendor  /  Bugtraq  Full-Disclosure  linux-kernel  linux-netdev  linux-ext4  linux-hardening  linux-cve-announce  PHC 
Open Source and information security mailing list archives
 
Hash Suite: Windows password security audit tool. GUI, reports in PDF.
[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Message-Id: <20201226025117.2770-7-jiangshanlai@gmail.com>
Date:   Sat, 26 Dec 2020 10:51:14 +0800
From:   Lai Jiangshan <jiangshanlai@...il.com>
To:     linux-kernel@...r.kernel.org
Cc:     Valentin Schneider <valentin.schneider@....com>,
        Peter Zijlstra <peterz@...radead.org>,
        Qian Cai <cai@...hat.com>,
        Vincent Donnefort <vincent.donnefort@....com>,
        Dexuan Cui <decui@...rosoft.com>,
        Lai Jiangshan <laijs@...ux.alibaba.com>,
        Tejun Heo <tj@...nel.org>,
        Lai Jiangshan <jiangshanlai@...il.com>
Subject: [PATCH -tip V3 6/8] workqueue: reorganize workqueue_online_cpu()

From: Lai Jiangshan <laijs@...ux.alibaba.com>

Just move around the code, no functionality changed.

It prepares for later patch protecting wq_online_cpumask
in wq_pool_attach_mutex.

Acked-by: Tejun Heo <tj@...nel.org>
Signed-off-by: Lai Jiangshan <laijs@...ux.alibaba.com>
---
 kernel/workqueue.c | 11 ++++++++---
 1 file changed, 8 insertions(+), 3 deletions(-)

diff --git a/kernel/workqueue.c b/kernel/workqueue.c
index 79cc87df0cda..94545e6feda5 100644
--- a/kernel/workqueue.c
+++ b/kernel/workqueue.c
@@ -5088,12 +5088,17 @@ int workqueue_online_cpu(unsigned int cpu)
 	mutex_lock(&wq_pool_mutex);
 	cpumask_set_cpu(cpu, wq_online_cpumask);
 
+	for_each_cpu_worker_pool(pool, cpu) {
+		mutex_lock(&wq_pool_attach_mutex);
+		rebind_workers(pool);
+		mutex_unlock(&wq_pool_attach_mutex);
+	}
+
+	/* update CPU affinity of workers of unbound pools */
 	for_each_pool(pool, pi) {
 		mutex_lock(&wq_pool_attach_mutex);
 
-		if (pool->cpu == cpu)
-			rebind_workers(pool);
-		else if (pool->cpu < 0)
+		if (pool->cpu < 0)
 			update_unbound_workers_cpumask(pool, true, cpu);
 
 		mutex_unlock(&wq_pool_attach_mutex);
-- 
2.19.1.6.gb485710b

Powered by blists - more mailing lists

Powered by Openwall GNU/*/Linux Powered by OpenVZ