linux-kernel - Re: (subset) [PATCH 07/12] fs: add RWF_DONTCACHE iocb and FOP_DONTCACHE file

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Message-ID: <b9abacf0-35e8-49d9-9b25-05a40997a6b6@kernel.dk>
Date: Mon, 6 Jan 2025 08:44:26 -0700
From: Jens Axboe <axboe@...nel.dk>
To: Christian Brauner <brauner@...nel.org>, linux-mm@...ck.org,
 linux-fsdevel@...r.kernel.org
Cc: hannes@...xchg.org, clm@...a.com, linux-kernel@...r.kernel.org,
 willy@...radead.org, kirill@...temov.name, bfoster@...hat.com
Subject: Re: (subset) [PATCH 07/12] fs: add RWF_DONTCACHE iocb and
 FOP_DONTCACHE file_operations flag

On 1/4/25 1:39 AM, Christian Brauner wrote:
> On Fri, 20 Dec 2024 08:47:45 -0700, Jens Axboe wrote:
>> If a file system supports uncached buffered IO, it may set FOP_DONTCACHE
>> and enable support for RWF_DONTCACHE. If RWF_DONTCACHE is attempted
>> without the file system supporting it, it'll get errored with -EOPNOTSUPP.
>>
>>
> 
> Jens, you can use this as a stable branch for the VFS changes.

Thanks, but not sure it's super useful for a patch in the middle. It
just adds a dependency, and I'd need to rebase. Providing an ack
or reviewed by would probably be more useful.

But given how slow the mm side is going, honestly not sure what the
target or plan is for inclusion at this point in time.

-- 
Jens Axboe