linux-kernel - Re: [PATCH 0/2] optimise iov

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Message-ID: <2b50322d-821f-469e-6f57-072b54e25ef4@kernel.dk>
Date:   Thu, 19 Nov 2020 09:46:57 -0700
From:   Jens Axboe <axboe@...nel.dk>
To:     Pavel Begunkov <asml.silence@...il.com>,
        linux-block@...r.kernel.org,
        Alexander Viro <viro@...iv.linux.org.uk>,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 0/2] optimise iov_iter

On 11/19/20 8:29 AM, Pavel Begunkov wrote:
> The first patch optimises iov_iter_npages() for the bvec case, and the
> second helps code generation to kill unreachable code.
> 
> Pavel Begunkov (2):
>   iov_iter: optimise iov_iter_npages for bvec
>   iov_iter: optimise iter type checking
> 
>  include/linux/uio.h | 10 +++++-----
>  lib/iov_iter.c      | 10 +++++-----
>  2 files changed, 10 insertions(+), 10 deletions(-)

Nice! Tested this and confirmed both the better code generation,
and reduction in overhead in iov_iter_npages().

Reviewed-by: Jens Axboe <axboe@...nel.dk>

-- 
Jens Axboe