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From: Bart Van Assche <bvanassche@acm.org>
To: Tal Zussman <tz2294@columbia.edu>, Jens Axboe <axboe@kernel.dk>,
	"Matthew Wilcox (Oracle)" <willy@infradead.org>,
	Christian Brauner <brauner@kernel.org>,
	"Darrick J. Wong" <djwong@kernel.org>,
	Carlos Maiolino <cem@kernel.org>,
	Alexander Viro <viro@zeniv.linux.org.uk>, Jan Kara <jack@suse.cz>
Cc: Christoph Hellwig <hch@infradead.org>,
	linux-block@vger.kernel.org, linux-kernel@vger.kernel.org,
	linux-xfs@vger.kernel.org, linux-fsdevel@vger.kernel.org,
	linux-mm@kvack.org
Subject: Re: [PATCH RFC v4 1/3] block: add BIO_COMPLETE_IN_TASK for task-context completion
Date: Wed, 25 Mar 2026 14:03:40 -0700	[thread overview]
Message-ID: <8f554173-4864-46fc-85e0-0a7f3ca70210@acm.org> (raw)
In-Reply-To: <20260325-blk-dontcache-v4-1-c4b56db43f64@columbia.edu>

On 3/25/26 11:43 AM, Tal Zussman wrote:
> +	schedule_work_on(smp_processor_id(), &batch->work);

Since schedule_work_on() queues work on system_percpu_wq the above call
has the same effect as schedule_work(&batch->work), isn't it? From the
workqueue implementation:

	system_percpu_wq = alloc_workqueue("events", WQ_PERCPU, 0);

[ ... ]

	if (req_cpu == WORK_CPU_UNBOUND) {
		if (wq->flags & WQ_UNBOUND)
			cpu = wq_select_unbound_cpu(raw_smp_processor_id());
		else
			cpu = raw_smp_processor_id();

Thanks,

Bart.


  parent reply	other threads:[~2026-03-25 21:04 UTC|newest]

Thread overview: 13+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-03-25 18:42 [PATCH RFC v4 0/3] block: enable RWF_DONTCACHE for block devices Tal Zussman
2026-03-25 18:43 ` [PATCH RFC v4 1/3] block: add BIO_COMPLETE_IN_TASK for task-context completion Tal Zussman
2026-03-25 19:54   ` Matthew Wilcox
2026-03-25 20:14   ` Jens Axboe
2026-03-25 20:26   ` Dave Chinner
2026-03-25 20:39     ` Matthew Wilcox
2026-03-26  2:44       ` Dave Chinner
2026-03-25 21:03   ` Bart Van Assche [this message]
2026-03-26  3:18     ` Dave Chinner
2026-03-25 18:43 ` [PATCH RFC v4 2/3] iomap: use BIO_COMPLETE_IN_TASK for dropbehind writeback Tal Zussman
2026-03-25 20:21   ` Matthew Wilcox
2026-03-25 20:34   ` Dave Chinner
2026-03-25 18:43 ` [PATCH RFC v4 3/3] block: enable RWF_DONTCACHE for block devices Tal Zussman

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