linux-kernel - Re: [PATCH] fs: io_uring.c: Add skip option for __io_sqe_files

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Date:   Tue, 26 Jan 2021 17:20:38 +0000
From:   Pavel Begunkov <asml.silence@...il.com>
To:     Noah Goldstein <goldstein.w.n@...il.com>
Cc:     noah <goldstein.n@...tl.edu>, Jens Axboe <axboe@...nel.dk>,
        Alexander Viro <viro@...iv.linux.org.uk>,
        "open list:IO_URING" <io-uring@...r.kernel.org>,
        "open list:FILESYSTEMS (VFS and infrastructure)" 
        <linux-fsdevel@...r.kernel.org>,
        open list <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] fs: io_uring.c: Add skip option for __io_sqe_files_update

On 26/01/2021 17:14, Noah Goldstein wrote:
> On Tue, Jan 26, 2021 at 7:29 AM Pavel Begunkov <asml.silence@...il.com> wrote:
>>
>> On 22/12/2020 02:10, Noah Goldstein wrote:
>>> On Sun, Dec 20, 2020 at 03:18:05PM +0000, Pavel Begunkov wrote:
>>>> On 20/12/2020 06:50, noah wrote:> From: noah <goldstein.n@...tl.edu>
>>>>>
>>>>> This patch makes it so that specify a file descriptor value of -2 will
>>>>> skip updating the corresponding fixed file index.
>>>>>
>>>>> This will allow for users to reduce the number of syscalls necessary
>>>>> to update a sparse file range when using the fixed file option.
>>>>
>>>> Answering the github thread -- it's indeed a simple change, I had it the
>>>> same day you posted the issue. See below it's a bit cleaner. However, I
>>>> want to first review "io_uring: buffer registration enhancements", and
>>>> if it's good, for easier merging/etc I'd rather prefer to let it go
>>>> first (even if partially).
>>
>> Noah, want to give it a try? I've just sent a prep patch, with it you
>> can implement it cleaner with one continue.
> 
>  Absolutely. Will get on it ASAP.

Perfect. Even better if you add a liburing test

-- 
Pavel Begunkov