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Date: Thu, 6 Nov 2014 15:59:27 +0800
From: ChenQi <Qi.Chen@windriver.com>
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To: Koen Kooi <koen@dominion.thruhere.net>
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Subject: Re: [PATCH 1/1] systemd: make /etc/sysctl.conf have real effect
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On 11/06/2014 03:48 PM, Koen Kooi wrote:
> Op 6 nov. 2014, om 08:32 heeft Chen Qi <Qi.Chen@windriver.com> het volgende geschreven:
>
>> In systemd, /etc/sysctl.conf is actually ignored by systemd-sysctl,
>> because this command only examine *.conf files under a bunch of directories
>> like /etc/sysctl.d or /usr/lib/sysctl.d.
>>
>> The problem is we are used to configuring kernel parameters in /etc/sysctl.conf,
>> so it would be really strange if the configuration in that file doesn't have any
>> effect.
>>
>> This patch reference Fedora's solution to this problem, creating a symlink to
>> /etc/sysctl.conf under /etc/sysctl.d/.
> Shouldn't this be done in procps instead?
>

Actually, the problem is not about `sysctl' command.
procps provides `sysctl', but busybox also provides this command.
It's very possible that on our generated image, procps is not installed 
but `sysctl' command is available.
Both busybox's and procps's `sysctl' command takes /etc/sysctl.conf into 
consideration.

Now, systemd provides a similar utility called `systemd-sysctl' which is 
executed at boot time via systemd-sysctl.service.

So our actually problem is that systemd-sysctl ignores /etc/sysctl.conf, 
which makes it somewhat strange, especially to users who are used to 
configuring parameters in sysctl.conf.
And this patch solves this problem by adding a symlink under /etc/sysctl.d/.

That's why I think we should put this in systemd.

Best Regards,
Chen Qi