From: Bjorn Helgaas <helgaas@kernel.org>
To: Frederic Weisbecker <frederic@kernel.org>
Cc: LKML <linux-kernel@vger.kernel.org>,
"Michal Koutný" <mkoutny@suse.com>,
"Andrew Morton" <akpm@linux-foundation.org>,
"Bjorn Helgaas" <bhelgaas@google.com>,
"Catalin Marinas" <catalin.marinas@arm.com>,
"Chen Ridong" <chenridong@huawei.com>,
"Danilo Krummrich" <dakr@kernel.org>,
"David S . Miller" <davem@davemloft.net>,
"Eric Dumazet" <edumazet@google.com>,
"Gabriele Monaco" <gmonaco@redhat.com>,
"Greg Kroah-Hartman" <gregkh@linuxfoundation.org>,
"Ingo Molnar" <mingo@redhat.com>,
"Jakub Kicinski" <kuba@kernel.org>,
"Jens Axboe" <axboe@kernel.dk>,
"Johannes Weiner" <hannes@cmpxchg.org>,
"Lai Jiangshan" <jiangshanlai@gmail.com>,
"Marco Crivellari" <marco.crivellari@suse.com>,
"Michal Hocko" <mhocko@suse.com>,
"Muchun Song" <muchun.song@linux.dev>,
"Paolo Abeni" <pabeni@redhat.com>,
"Peter Zijlstra" <peterz@infradead.org>,
"Phil Auld" <pauld@redhat.com>,
"Rafael J . Wysocki" <rafael@kernel.org>,
"Roman Gushchin" <roman.gushchin@linux.dev>,
"Shakeel Butt" <shakeel.butt@linux.dev>,
"Simon Horman" <horms@kernel.org>, "Tejun Heo" <tj@kernel.org>,
"Thomas Gleixner" <tglx@linutronix.de>,
"Vlastimil Babka" <vbabka@suse.cz>,
"Waiman Long" <longman@redhat.com>,
"Will Deacon" <will@kernel.org>,
cgroups@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
linux-block@vger.kernel.org, linux-mm@kvack.org,
linux-pci@vger.kernel.org, netdev@vger.kernel.org,
"Jinhui Guo" <guojinhui.liam@bytedance.com>
Subject: Re: [PATCH 01/33] PCI: Prepare to protect against concurrent isolated cpuset change
Date: Wed, 7 Jan 2026 13:05:34 -0600 [thread overview]
Message-ID: <20260107190534.GA441483@bhelgaas> (raw)
In-Reply-To: <20260101221359.22298-2-frederic@kernel.org>
[+cc Jinhui]
On Thu, Jan 01, 2026 at 11:13:26PM +0100, Frederic Weisbecker wrote:
> HK_TYPE_DOMAIN will soon integrate cpuset isolated partitions and
> therefore be made modifiable at runtime. Synchronize against the cpumask
> update using RCU.
>
> The RCU locked section includes both the housekeeping CPU target
> election for the PCI probe work and the work enqueue.
>
> This way the housekeeping update side will simply need to flush the
> pending related works after updating the housekeeping mask in order to
> make sure that no PCI work ever executes on an isolated CPU. This part
> will be handled in a subsequent patch.
>
> Signed-off-by: Frederic Weisbecker <frederic@kernel.org>
Just FYI, Jinhui posted a series that touches this same code and might
need some coordination:
https://lore.kernel.org/r/20260107175548.1792-1-guojinhui.liam@bytedance.com
IIUC, Jinhui's series adds some more NUMA smarts in the driver core
sync probing path and removes corresponding NUMA code from the PCI
core probe path.
Bjorn
next prev parent reply other threads:[~2026-01-07 19:05 UTC|newest]
Thread overview: 47+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-01-01 22:13 [PATCH 00/33 v6] cpuset/isolation: Honour kthreads preferred affinity Frederic Weisbecker
2026-01-01 22:13 ` [PATCH 01/33] PCI: Prepare to protect against concurrent isolated cpuset change Frederic Weisbecker
2026-01-07 19:05 ` Bjorn Helgaas [this message]
2026-01-07 23:30 ` Frederic Weisbecker
2026-01-07 23:39 ` Bjorn Helgaas
2026-01-08 8:43 ` Jinhui Guo
2026-01-01 22:13 ` [PATCH 02/33] cpu: Revert "cpu/hotplug: Prevent self deadlock on CPU hot-unplug" Frederic Weisbecker
2026-01-01 22:13 ` [PATCH 03/33] memcg: Prepare to protect against concurrent isolated cpuset change Frederic Weisbecker
2026-01-01 22:13 ` [PATCH 04/33] mm: vmstat: " Frederic Weisbecker
2026-01-01 22:13 ` [PATCH 05/33] sched/isolation: Save boot defined domain flags Frederic Weisbecker
2026-01-01 22:13 ` [PATCH 06/33] cpuset: Convert boot_hk_cpus to use HK_TYPE_DOMAIN_BOOT Frederic Weisbecker
2026-01-01 22:13 ` [PATCH 07/33] driver core: cpu: Convert /sys/devices/system/cpu/isolated " Frederic Weisbecker
2026-01-01 22:13 ` [PATCH 08/33] net: Keep ignoring isolated cpuset change Frederic Weisbecker
2026-01-01 22:13 ` [PATCH 09/33] block: Protect against concurrent " Frederic Weisbecker
2026-01-01 22:13 ` [PATCH 10/33] timers/migration: Prevent from lockdep false positive warning Frederic Weisbecker
2026-01-01 22:13 ` [PATCH 11/33] cpu: Provide lockdep check for CPU hotplug lock write-held Frederic Weisbecker
2026-01-01 22:13 ` [PATCH 12/33] cpuset: Provide lockdep check for cpuset lock held Frederic Weisbecker
2026-01-01 22:13 ` [PATCH 13/33] sched/isolation: Convert housekeeping cpumasks to rcu pointers Frederic Weisbecker
2026-01-07 11:56 ` Simon Horman
2026-01-01 22:13 ` [PATCH 14/33] cpuset: Update HK_TYPE_DOMAIN cpumask from cpuset Frederic Weisbecker
2026-01-01 22:13 ` [PATCH 15/33] sched/isolation: Flush memcg workqueues on cpuset isolated partition change Frederic Weisbecker
2026-01-01 22:13 ` [PATCH 16/33] sched/isolation: Flush vmstat " Frederic Weisbecker
2026-01-01 22:13 ` [PATCH 17/33] PCI: Flush PCI probe workqueue " Frederic Weisbecker
2026-01-01 22:13 ` [PATCH 18/33] cpuset: Propagate cpuset isolation update to workqueue through housekeeping Frederic Weisbecker
2026-01-01 22:13 ` [PATCH 19/33] cpuset: Propagate cpuset isolation update to timers " Frederic Weisbecker
2026-01-01 22:13 ` [PATCH 20/33] timers/migration: Remove superfluous cpuset isolation test Frederic Weisbecker
2026-01-01 22:13 ` [PATCH 21/33] cpuset: Remove cpuset_cpu_is_isolated() Frederic Weisbecker
2026-01-01 22:13 ` [PATCH 22/33] sched/isolation: Remove HK_TYPE_TICK test from cpu_is_isolated() Frederic Weisbecker
2026-01-01 22:13 ` [PATCH 23/33] PCI: Remove superfluous HK_TYPE_WQ check Frederic Weisbecker
2026-01-01 22:13 ` [PATCH 24/33] kthread: Refine naming of affinity related fields Frederic Weisbecker
2026-01-01 22:13 ` [PATCH 25/33] kthread: Include unbound kthreads in the managed affinity list Frederic Weisbecker
2026-01-01 22:13 ` [PATCH 26/33] kthread: Include kthreadd to " Frederic Weisbecker
2026-01-01 22:13 ` [PATCH 27/33] kthread: Rely on HK_TYPE_DOMAIN for preferred affinity management Frederic Weisbecker
2026-01-01 22:13 ` [PATCH 28/33] sched: Switch the fallback task allowed cpumask to HK_TYPE_DOMAIN Frederic Weisbecker
2026-01-01 22:13 ` [PATCH 29/33] sched/arm64: Move fallback task " Frederic Weisbecker
2026-01-01 22:13 ` [PATCH 30/33] kthread: Honour kthreads preferred affinity after cpuset changes Frederic Weisbecker
2026-01-01 22:13 ` [PATCH 31/33] kthread: Comment on the purpose and placement of kthread_affine_node() call Frederic Weisbecker
2026-01-01 22:13 ` [PATCH 32/33] kthread: Document kthread_affine_preferred() Frederic Weisbecker
2026-01-01 22:13 ` [PATCH 33/33] doc: Add housekeeping documentation Frederic Weisbecker
-- strict thread matches above, loose matches on Subject: below --
2025-12-24 13:44 [PATCH 00/33 v5] cpuset/isolation: Honour kthreads preferred affinity Frederic Weisbecker
2025-12-24 13:44 ` [PATCH 01/33] PCI: Prepare to protect against concurrent isolated cpuset change Frederic Weisbecker
2025-12-29 3:23 ` Zhang Qiao
2025-12-29 3:53 ` Waiman Long
2025-12-31 13:18 ` Frederic Weisbecker
2025-12-30 22:38 ` Frederic Weisbecker
2025-10-13 20:31 [PATCH 00/33 v3] cpuset/isolation: Honour kthreads preferred affinity Frederic Weisbecker
2025-10-13 20:31 ` [PATCH 01/33] PCI: Prepare to protect against concurrent isolated cpuset change Frederic Weisbecker
2025-10-14 20:53 ` Bjorn Helgaas
2025-10-31 15:30 ` Frederic Weisbecker
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