From: Thomas Gleixner <tglx@kernel.org>
To: Jing Wu <realwujing@gmail.com>, Ingo Molnar <mingo@redhat.com>,
Peter Zijlstra <peterz@infradead.org>,
Juri Lelli <juri.lelli@redhat.com>,
Vincent Guittot <vincent.guittot@linaro.org>,
Dietmar Eggemann <dietmar.eggemann@arm.com>,
Steven Rostedt <rostedt@goodmis.org>,
Ben Segall <bsegall@google.com>, Mel Gorman <mgorman@suse.de>,
Valentin Schneider <vschneid@redhat.com>,
"Paul E. McKenney" <paulmck@kernel.org>,
Frederic Weisbecker <frederic@kernel.org>,
Neeraj Upadhyay <neeraj.upadhyay@kernel.org>,
Joel Fernandes <joelagnelf@nvidia.com>,
Josh Triplett <josh@joshtriplett.org>,
Boqun Feng <boqun@kernel.org>,
Uladzislau Rezki <urezki@gmail.com>,
Mathieu Desnoyers <mathieu.desnoyers@efficios.com>,
Lai Jiangshan <jiangshanlai@gmail.com>,
Zqiang <qiang.zhang@linux.dev>,
Anna-Maria Behnsen <anna-maria@linutronix.de>,
Tejun Heo <tj@kernel.org>, Jonathan Corbet <corbet@lwn.net>,
Shuah Khan <skhan@linuxfoundation.org>,
Shuah Khan <shuah@kernel.org>, Waiman Long <longman@redhat.com>
Cc: linux-kernel@vger.kernel.org, rcu@vger.kernel.org,
cgroups@vger.kernel.org, linux-doc@vger.kernel.org,
linux-kselftest@vger.kernel.org, Jing Wu <realwujing@gmail.com>,
Qiliang Yuan <yuanql9@chinatelecom.cn>
Subject: Re: [PATCH v3 08/13] genirq: Add explicit housekeeping callback for managed IRQ migration
Date: Thu, 18 Jun 2026 23:11:36 +0200 [thread overview]
Message-ID: <87zf0rd053.ffs@fw13> (raw)
In-Reply-To: <87cxxnegqa.ffs@fw13>
On Thu, Jun 18 2026 at 22:27, Thomas Gleixner wrote:
> On Thu, Jun 18 2026 at 11:11, Jing Wu wrote:
>> + */
>> + if (irqd_affinity_is_managed(&desc->irq_data)) {
>
> So you set the affinity even on an interrupt which is shutdown?
>
>> + const struct cpumask *mask;
>> + struct cpumask *tmp = this_cpu_ptr(&__tmp_mask);
How is this correct? You cannot get the per cpu pointer in preemptible
context. The task might be migrated and then fiddle with the wrong
per CPU data. But that's moot as this code is broken anyway.
next prev parent reply other threads:[~2026-06-18 21:11 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-06-18 3:11 [PATCH v3 00/13] Dynamic Housekeeping Management (DHM) via CPUSets Jing Wu
2026-06-18 3:11 ` [PATCH v3 01/13] sched/isolation: Replace notifier chain with explicit callback interface Jing Wu
2026-06-18 3:11 ` [PATCH v3 02/13] sched/isolation: Add housekeeping_update_types() for kernel-noise masks Jing Wu
2026-06-18 3:11 ` [PATCH v3 03/13] sched/isolation: RCU-protect all housekeeping cpumask readers Jing Wu
2026-06-18 3:11 ` [PATCH v3 04/13] sched/isolation: Fix RCU protection for runtime-mutable cpumask callers Jing Wu
2026-06-18 3:11 ` [PATCH v3 05/13] cpu/hotplug: Reserve CPUHP states for nohz_full and managed IRQ down-paths Jing Wu
2026-06-18 16:06 ` Thomas Gleixner
2026-06-18 21:01 ` Thomas Gleixner
2026-06-18 3:11 ` [PATCH v3 06/13] tick/nohz, context_tracking: Prepare for runtime nohz_full updates Jing Wu
2026-06-18 17:27 ` Thomas Gleixner
2026-06-18 19:49 ` Thomas Gleixner
2026-06-18 3:11 ` [PATCH v3 07/13] rcu/nocb: Add explicit housekeeping callback for runtime NOCB toggling Jing Wu
2026-06-18 3:11 ` [PATCH v3 08/13] genirq: Add explicit housekeeping callback for managed IRQ migration Jing Wu
2026-06-18 20:27 ` Thomas Gleixner
2026-06-18 21:11 ` Thomas Gleixner [this message]
2026-06-18 3:11 ` [PATCH v3 09/13] watchdog/lockup_detector: Register housekeeping callback for kernel-noise Jing Wu
2026-06-18 3:11 ` [PATCH v3 10/13] sched: Guard sched_tick_start/stop against uninitialized tick_work_cpu Jing Wu
2026-06-18 20:50 ` Thomas Gleixner
2026-06-18 3:11 ` [PATCH v3 11/13] cgroup/cpuset: Extend isolated partition to trigger kernel-noise isolation Jing Wu
2026-06-18 20:55 ` Thomas Gleixner
2026-06-18 3:11 ` [PATCH v3 12/13] docs: cgroup-v2: Document kernel-noise isolation via isolated partitions Jing Wu
2026-06-18 3:11 ` [PATCH v3 13/13] selftests/cgroup: Add kernel-noise isolation test to cpuset selftest Jing Wu
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=87zf0rd053.ffs@fw13 \
--to=tglx@kernel.org \
--cc=anna-maria@linutronix.de \
--cc=boqun@kernel.org \
--cc=bsegall@google.com \
--cc=cgroups@vger.kernel.org \
--cc=corbet@lwn.net \
--cc=dietmar.eggemann@arm.com \
--cc=frederic@kernel.org \
--cc=jiangshanlai@gmail.com \
--cc=joelagnelf@nvidia.com \
--cc=josh@joshtriplett.org \
--cc=juri.lelli@redhat.com \
--cc=linux-doc@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-kselftest@vger.kernel.org \
--cc=longman@redhat.com \
--cc=mathieu.desnoyers@efficios.com \
--cc=mgorman@suse.de \
--cc=mingo@redhat.com \
--cc=neeraj.upadhyay@kernel.org \
--cc=paulmck@kernel.org \
--cc=peterz@infradead.org \
--cc=qiang.zhang@linux.dev \
--cc=rcu@vger.kernel.org \
--cc=realwujing@gmail.com \
--cc=rostedt@goodmis.org \
--cc=shuah@kernel.org \
--cc=skhan@linuxfoundation.org \
--cc=tj@kernel.org \
--cc=urezki@gmail.com \
--cc=vincent.guittot@linaro.org \
--cc=vschneid@redhat.com \
--cc=yuanql9@chinatelecom.cn \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox