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Message-ID: <c728bf3f-d9db-4865-8473-058b26c11c06@linux.dev>
Date: Tue, 29 Aug 2023 15:46:13 +0800
From: Hao Xu <hao.xu@...ux.dev>
To: Matthew Wilcox <willy@...radead.org>
Cc: io-uring@...r.kernel.org, Jens Axboe <axboe@...nel.dk>,
Dominique Martinet <asmadeus@...ewreck.org>,
Pavel Begunkov <asml.silence@...il.com>,
Christian Brauner <brauner@...nel.org>,
Alexander Viro <viro@...iv.linux.org.uk>,
Stefan Roesch <shr@...com>, Clay Harris <bugs@...ycon.org>,
Dave Chinner <david@...morbit.com>,
"Darrick J . Wong" <djwong@...nel.org>,
linux-fsdevel@...r.kernel.org, linux-xfs@...r.kernel.org,
linux-ext4@...r.kernel.org, linux-cachefs@...hat.com,
ecryptfs@...r.kernel.org, linux-nfs@...r.kernel.org,
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Wanpeng Li <wanpengli@...cent.com>
Subject: Re: [PATCH 07/11] vfs: add nowait parameter for file_accessed()
On 8/28/23 05:32, Matthew Wilcox wrote:
> On Sun, Aug 27, 2023 at 09:28:31PM +0800, Hao Xu wrote:
>> From: Hao Xu <howeyxu@...cent.com>
>>
>> Add a boolean parameter for file_accessed() to support nowait semantics.
>> Currently it is true only with io_uring as its initial caller.
>
> So why do we need to do this as part of this series? Apparently it
> hasn't caused any problems for filemap_read().
>
We need this parameter to indicate if nowait semantics should be
enforced in touch_atime(), There are locks and maybe IOs in it.
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