From: Christoph Hellwig <hch@infradead.org>
To: Gao Xiang <hsiangkao@linux.alibaba.com>
Cc: Christoph Hellwig <hch@infradead.org>,
Dave Chinner <dgc@kernel.org>, 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>,
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 2/3] iomap: use BIO_COMPLETE_IN_TASK for dropbehind writeback
Date: Thu, 26 Mar 2026 23:27:20 -0700 [thread overview]
Message-ID: <acYjSMkz9MdWQKoJ@infradead.org> (raw)
In-Reply-To: <9e8061a5-980e-4e6a-a349-8a89f9eb1ba6@linux.alibaba.com>
On Fri, Mar 27, 2026 at 02:24:02PM +0800, Gao Xiang wrote:
> - use EROFS directly, in that case, we still need process
> contexts to decompress, but due to Android latency
> requirements, they really need per-cpu RT threads instead,
> otherwise it will cause serious regression too; but I'm not
> sure that case can be replaced by this work since workqueues
> don't support RT threads and I guess generic block layer
> won't be bothered with that too.
All of the I/O completions should be latency sensitive. So I think it
would be great if you could help out here with the requirements and
implementation.
next prev parent reply other threads:[~2026-03-27 6:27 UTC|newest]
Thread overview: 33+ 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
2026-04-08 18:48 ` Tal Zussman
2026-04-08 19:51 ` Jens Axboe
2026-04-08 22:51 ` Tal Zussman
2026-04-08 23:36 ` Jens Axboe
2026-04-09 18:54 ` Tal Zussman
2026-04-10 0:46 ` Jens Axboe
2026-04-14 20:29 ` Tal Zussman
2026-04-15 6:10 ` Christoph Hellwig
2026-03-25 20:26 ` Dave Chinner
2026-03-25 20:39 ` Matthew Wilcox
2026-03-26 2:44 ` Dave Chinner
2026-04-08 18:50 ` Tal Zussman
2026-03-25 21:03 ` Bart Van Assche
2026-03-26 3:18 ` Dave Chinner
2026-03-27 6:01 ` Christoph Hellwig
2026-04-08 19:35 ` Tal Zussman
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
2026-03-27 6:03 ` Christoph Hellwig
2026-04-08 19:36 ` Tal Zussman
2026-04-08 19:44 ` Tal Zussman
2026-04-08 20:01 ` Matthew Wilcox
2026-04-08 20:10 ` Tal Zussman
2026-03-25 20:34 ` Dave Chinner
2026-03-27 6:08 ` Christoph Hellwig
2026-03-27 6:24 ` Gao Xiang
2026-03-27 6:27 ` Christoph Hellwig [this message]
2026-03-27 6:45 ` Gao Xiang
2026-03-25 18:43 ` [PATCH RFC v4 3/3] block: enable RWF_DONTCACHE for block devices Tal Zussman
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