From: Tianchen Ding <dtcccc@linux.alibaba.com> To: Zefan Li <lizefan.x@bytedance.com>, Tejun Heo <tj@kernel.org>, Johannes Weiner <hannes@cmpxchg.org>, Waiman Long <longman@redhat.com>, "Peter Zijlstra (Intel)" <peterz@infradead.org> Cc: cgroups@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH] cpuset: Fix the bug that subpart_cpus updated wrongly in update_cpumask() Date: Tue, 18 Jan 2022 18:05:18 +0800 [thread overview] Message-ID: <20220118100518.2381118-1-dtcccc@linux.alibaba.com> (raw) subparts_cpus should be limited as a subset of cpus_allowed, but it is updated wrongly by using cpumask_andnot(). Use cpumask_and() instead to fix it. Fixes: ee8dde0cd2ce ("cpuset: Add new v2 cpuset.sched.partition flag") Signed-off-by: Tianchen Ding <dtcccc@linux.alibaba.com> --- kernel/cgroup/cpuset.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) diff --git a/kernel/cgroup/cpuset.c b/kernel/cgroup/cpuset.c index bb3531e7fda7..804ff5738c5f 100644 --- a/kernel/cgroup/cpuset.c +++ b/kernel/cgroup/cpuset.c @@ -1635,8 +1635,7 @@ static int update_cpumask(struct cpuset *cs, struct cpuset *trialcs, * Make sure that subparts_cpus is a subset of cpus_allowed. */ if (cs->nr_subparts_cpus) { - cpumask_andnot(cs->subparts_cpus, cs->subparts_cpus, - cs->cpus_allowed); + cpumask_and(cs->subparts_cpus, cs->subparts_cpus, cs->cpus_allowed); cs->nr_subparts_cpus = cpumask_weight(cs->subparts_cpus); } spin_unlock_irq(&callback_lock); -- 2.33.0
WARNING: multiple messages have this Message-ID (diff)
From: Tianchen Ding <dtcccc-KPsoFbNs7GizrGE5bRqYAgC/G2K4zDHf@public.gmane.org> To: Zefan Li <lizefan.x-EC8Uxl6Npydl57MIdRCFDg@public.gmane.org>, Tejun Heo <tj-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>, Johannes Weiner <hannes-druUgvl0LCNAfugRpC6u6w@public.gmane.org>, Waiman Long <longman-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>, "Peter Zijlstra (Intel)" <peterz-wEGCiKHe2LqWVfeAwA7xHQ@public.gmane.org> Cc: cgroups-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org Subject: [PATCH] cpuset: Fix the bug that subpart_cpus updated wrongly in update_cpumask() Date: Tue, 18 Jan 2022 18:05:18 +0800 [thread overview] Message-ID: <20220118100518.2381118-1-dtcccc@linux.alibaba.com> (raw) subparts_cpus should be limited as a subset of cpus_allowed, but it is updated wrongly by using cpumask_andnot(). Use cpumask_and() instead to fix it. Fixes: ee8dde0cd2ce ("cpuset: Add new v2 cpuset.sched.partition flag") Signed-off-by: Tianchen Ding <dtcccc-KPsoFbNs7GizrGE5bRqYAgC/G2K4zDHf@public.gmane.org> --- kernel/cgroup/cpuset.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) diff --git a/kernel/cgroup/cpuset.c b/kernel/cgroup/cpuset.c index bb3531e7fda7..804ff5738c5f 100644 --- a/kernel/cgroup/cpuset.c +++ b/kernel/cgroup/cpuset.c @@ -1635,8 +1635,7 @@ static int update_cpumask(struct cpuset *cs, struct cpuset *trialcs, * Make sure that subparts_cpus is a subset of cpus_allowed. */ if (cs->nr_subparts_cpus) { - cpumask_andnot(cs->subparts_cpus, cs->subparts_cpus, - cs->cpus_allowed); + cpumask_and(cs->subparts_cpus, cs->subparts_cpus, cs->cpus_allowed); cs->nr_subparts_cpus = cpumask_weight(cs->subparts_cpus); } spin_unlock_irq(&callback_lock); -- 2.33.0
next reply other threads:[~2022-01-18 10:05 UTC|newest] Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top 2022-01-18 10:05 Tianchen Ding [this message] 2022-01-18 10:05 ` [PATCH] cpuset: Fix the bug that subpart_cpus updated wrongly in update_cpumask() Tianchen Ding 2022-01-18 20:21 ` Waiman Long 2022-01-18 20:21 ` Waiman Long 2022-01-26 2:17 ` Tianchen Ding 2022-01-26 2:17 ` Tianchen Ding 2022-01-26 16:49 ` Tejun Heo 2022-01-26 16:49 ` Tejun Heo
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