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Subject: Re: [PATCH 07/11] vfs: add nowait parameter for file_accessed()
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To: Matthew Wilcox <willy@infradead.org>
Cc: io-uring@vger.kernel.org, Jens Axboe <axboe@kernel.dk>,
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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@tencent.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.