linux-kernel - Re: [PATCH] uio: Replace mutex info_lock with percpu

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Date:   Tue, 8 Feb 2022 16:00:31 +0800
From:   kanie <kanie@...ux.alibaba.com>
To:     Greg KH <gregkh@...uxfoundation.org>
Cc:     xiaoguang.wang@...ux.alibaba.com, xlpang@...ux.alibaba.com,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] uio: Replace mutex info_lock with percpu_ref to improve
 performance


在 2022/2/8 15:25, Greg KH 写道:
> On Tue, Feb 08, 2022 at 03:19:20PM +0800, Guixin Liu wrote:
>> This patch includes a modification to repace mutex info_lock with
>> percpu_ref, in order to improve uio performance.
> How does it improve performance?  What benchmark are you using and what
> are the results?
>
> These changes are quite complex, you need to better describe these in
> order to be able to have them accepted.
>
> thanks,
>
> greg k-h

okay, I will supplement the performance-test result later.

Guixin Liu