linux-kernel - Re: [PATCH 0/2][for-next] cleanup submission path

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <666ed447-ba8f-29e7-237f-de8044aa63ea@kernel.dk>
Date:   Sun, 27 Oct 2019 10:32:04 -0600
From:   Jens Axboe <axboe@...nel.dk>
To:     Pavel Begunkov <asml.silence@...il.com>,
        linux-block@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 0/2][for-next] cleanup submission path

On 10/27/19 9:35 AM, Pavel Begunkov wrote:
> A small cleanup of very similar but diverged io_submit_sqes() and
> io_ring_submit()
> 
> Pavel Begunkov (2):
>    io_uring: handle mm_fault outside of submission
>    io_uring: merge io_submit_sqes and io_ring_submit
> 
>   fs/io_uring.c | 116 ++++++++++++++------------------------------------
>   1 file changed, 33 insertions(+), 83 deletions(-)

I like the cleanups here, but one thing that seems off is the
assumption that io_sq_thread() always needs to grab the mm. If
the sqes processed are just READ/WRITE_FIXED, then it never needs
to grab the mm.

-- 
Jens Axboe