netdev - Re: [PATCH 16/33] PCI: Flush PCI probe workqueue on cpuset isolated partition change

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Message-ID: <aQt7Gg3XJ7fVdD3W@localhost.localdomain>
Date: Wed, 5 Nov 2025 17:28:10 +0100
From: Frederic Weisbecker <frederic@...nel.org>
To: Bjorn Helgaas <helgaas@...nel.org>
Cc: LKML <linux-kernel@...r.kernel.org>,
	Michal Koutný <mkoutny@...e.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Bjorn Helgaas <bhelgaas@...gle.com>,
	Catalin Marinas <catalin.marinas@....com>,
	Danilo Krummrich <dakr@...nel.org>,
	"David S . Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Gabriele Monaco <gmonaco@...hat.com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Ingo Molnar <mingo@...hat.com>, Jakub Kicinski <kuba@...nel.org>,
	Jens Axboe <axboe@...nel.dk>, Johannes Weiner <hannes@...xchg.org>,
	Lai Jiangshan <jiangshanlai@...il.com>,
	Marco Crivellari <marco.crivellari@...e.com>,
	Michal Hocko <mhocko@...e.com>, Muchun Song <muchun.song@...ux.dev>,
	Paolo Abeni <pabeni@...hat.com>,
	Peter Zijlstra <peterz@...radead.org>, Phil Auld <pauld@...hat.com>,
	"Rafael J . Wysocki" <rafael@...nel.org>,
	Roman Gushchin <roman.gushchin@...ux.dev>,
	Shakeel Butt <shakeel.butt@...ux.dev>,
	Simon Horman <horms@...nel.org>, Tejun Heo <tj@...nel.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Vlastimil Babka <vbabka@...e.cz>, Waiman Long <longman@...hat.com>,
	Will Deacon <will@...nel.org>, cgroups@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org, linux-block@...r.kernel.org,
	linux-mm@...ck.org, linux-pci@...r.kernel.org,
	netdev@...r.kernel.org
Subject: Re: [PATCH 16/33] PCI: Flush PCI probe workqueue on cpuset isolated
 partition change

Le Tue, Oct 14, 2025 at 03:50:34PM -0500, Bjorn Helgaas a écrit :
> On Mon, Oct 13, 2025 at 10:31:29PM +0200, Frederic Weisbecker wrote:
> > The HK_TYPE_DOMAIN housekeeping cpumask is now modifyable at runtime. In
> > order to synchronize against PCI probe works and make sure that no
> > asynchronous probing is still pending or executing on a newly made
> > isolated CPU, the housekeeping susbsystem must flush the PCI probe
> > works.
> > 
> > However the PCI probe works can't be flushed easily since they are
> > queued to the main per-CPU workqueue pool.
> > 
> > Solve this with creating a PCI probe specific pool and provide and use
> > the appropriate flushing API.
> 
> s/modifyable/modifiable/
> s/newly made isolated/newly isolated/
> s/susbsystem/subsystem/
> s/PCI probe specific pool/PCI probe-specific pool/

All fixed! Thanks.


-- 
Frederic Weisbecker
SUSE Labs