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Subject: Re: [PATCH v2 2/2] delayacct: add a proc file to dump the delay info
To:     Andrew Morton <akpm@linux-foundation.org>
Cc:     adobriyan@gmail.com, bsingharora@gmail.com, ebiederm@xmission.com,
        linux-kernel@vger.kernel.org
References: <8ac9f35074326cb36e3cdbf0ad70b36dc3412e86.1618841970.git.brookxu@tencent.com>
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 <20210509205853.42a3a06f9c5b70b52bdf8509@linux-foundation.org>
From:   brookxu <brookxu.cn@gmail.com>
Message-ID: <b83bd36b-2e19-50f1-323b-2961a35bfe5e@gmail.com>
Date:   Tue, 11 May 2021 09:10:21 +0800
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Thanks for you reply :)

Andrew Morton wrote on 2021/5/10 11:58:
> On Mon, 19 Apr 2021 22:37:07 +0800 brookxu <brookxu.cn@gmail.com> wrote:
> 
>> Many distributions do not install the getdelay tool by
>> default, similar to task_io_accounting, adding a proc
>> file to make access easier.
> 
> Well, we developed and maintain getdelays.c for a reason.  Why should
> we add (and maintain) kernel code because some people are too
> lame to install the tool we provided?
> 
In some production environments, all modifications are restricted, and
the addition of business-unrelated tools is generally not allowed.
Adding new tools to Linux distributions may require a very complicated
process, as some of them are directly using centos. But kernel upgrade 
is sometimes necessary, so I think a proc file can circumvent many
problems in the production environment.