[arch-general] systemd adds entries to /etc/mtab

[Janna M.]

On Sat, Oct 20, 2012 at 10:21:53AM +0200, Rodrigo Rivas wrote:
>On Sat, Oct 20, 2012 at 3:01 AM, Janna M. <janna.martl109 at gmail.com> wrote:
>
>> I just switched to systemd, and was poking around a bit when I noticed
>> many new entries in /etc/mtab:
>>
>> ...
>>
>
>Note that recent systemd versions include a link to the documentation of
>some units. For example:
>
>$ systemctl status dev-mqueue.mount | grep Docs
>     Docs: man:mq_overview(7)
>
>So doing:
>
>$ man 7 mq_overview
>
>will give you an overview of what it is used for.
>
>Generally speaking, these are sometimes called "API filesystems" because
>they povide kernel services to applications instead of file storage. They
>can be removed only if none of your running applications use them, but that
>could be difficult to assert. And since they use almost no resources for
>just being mounted, there is little reason for not mounting them at system
>startup. That's why systemd does it automatically by default.
>
>However, you can try disabling them and see what happens. In particular
>disabling the debugfs thing should do no harm.
>
>PS: There is a very thorough and interesting series about the hugepages at
>LWN: [1] [2] [3] [4] [5].
>
>[1]: http://lwn.net/Articles/374424/
>[2]: http://lwn.net/Articles/375096/
>[3]: http://lwn.net/Articles/376606/
>[4]: http://lwn.net/Articles/378641/
>[5]: http://lwn.net/Articles/379748/
>
>-- 
>Rodrigo


Very interesting; thanks!