On Thu, Aug 18, 2011 at 2:55 PM, Kay Sievers <kay.sievers@xxxxxxxx> wrote:
>
>> So NAK. We're not slowing down normal code for some new feature that
>> realistically will never be used by any normal applications.
>
> It will be used for all new service managers. UNIX is a pain if you want
> to watch your children regarding double-forking, if you are not init.
I'll believe that "all new service managers" when I see it. Until
then, a new feature is just that - a new feature. Which nobody uses.
> And it will clean up the mess the desktop stuff is putting in 'ps afx'.
> Here is the before/after output:
>
> 253 ? Ss 0:00 /bin/dbus-daemon --system --address=systemd: --nofork --systemd-activation
> 294 ? Sl 0:00 /usr/libexec/polkit-1/polkitd
> 328 ? S 0:00 /usr/sbin/modem-manager
> 608 ? Sl 0:00 /usr/libexec/colord
> 658 ? Sl 0:00 /usr/libexec/upowerd
> 819 ? Sl 0:00 /usr/libexec/imsettings-daemon
> 916 ? Sl 0:00 /usr/libexec/udisks-daemon
> 917 ? S 0:00 \_ udisks-daemon: not polling any devices
>
>
> 294 ? Ss 0:00 /bin/dbus-daemon --system --address=systemd: --nofork --systemd-activation
> 426 ? Sl 0:00 \_ /usr/libexec/polkit-1/polkitd
> 449 ? S 0:00 \_ /usr/sbin/modem-manager
> 635 ? Sl 0:00 \_ /usr/libexec/colord
> 705 ? Sl 0:00 \_ /usr/libexec/upowerd
> 959 ? Sl 0:00 \_ /usr/libexec/udisks-daemon
> 960 ? S 0:00 | \_ udisks-daemon: not polling any devices
> 977 ? Sl 0:00 \_ /usr/libexec/packagekitd
Yeah, that looks like a nice feature.
> If you want, we can make the forked processes inherit a flag if the
> 'subreaper' should be looked up at all. Then we have almost zero
> overhead if the feature isn't used. You think that's needed?
Yes, I do. Because with any current system, that "almost zero
overhead" is just totally wasted effort entirely for zero gain. Which
just makes me go "Eww".
Linus
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