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List:       systemd-devel
Subject:    Re: [systemd-devel] OnCalendar every X minutes
From:       Lennart Poettering <lennart () poettering ! net>
Date:       2015-04-02 8:39:31
Message-ID: 20150402083931.GD29671 () gardel-login
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On Mon, 30.03.15 01:12, Mirco Tischler (mt-ml@gmx.de) wrote:

> However there's one difference between these relative triggers and
> OnCalendar: you can only use Persistent= in combination with
> OnCalendar. This means that if your timer elapses in 5 minutes and you
> suspend your machine for an hour or so, after resume it still elapses
> in 5 minutes.

To clarify: Persietent= only matters for full system reboots, it has
no effect on suspend/resume cycles.

What you are asking for are basically .timer triggers for
CLOCK_BOOTTIME rather than CLOCK_MONOTONIC. This is something we could
certainly support, hence I added this to th TODO list now.

Traditionally CLOCK_BOOTTIME didn't support timerfd(), but that
limitation has been lifted on newer kernerls AFAIR, hence we could add
this relatively easily.

Lennart

-- 
Lennart Poettering, Red Hat
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