[systemd-devel] [HEADS-UP] systemd and Storage Daemons for the Root File System

[Lennart Poettering]

On Wed, 11.01.12 09:21, Colin Guthrie (gmane at colin.guthr.ie) wrote:

> 
> 'Twas brillig, and Lennart Poettering at 10/01/12 22:24 did gyre and gimble:
> > Heya,
> > 
> > Since quite some time there have been unresolved issues with certain
> > unkillable storage daemons maintaining the root file system's storage
> > backing. To clear this up we have discussed the situation with a couple
> > of folks and are now proposing the scheme pointed out here:
> > 
> > http://www.freedesktop.org/wiki/Software/systemd/RootStorageDaemons
> > 
> > If you are involved with early-boot stuff, like building initrds, or are
> > doing storage stuff or are otherwise interested please have a look.
> 
> Probably a daft question, but can systemd not simply look at all the
> processes running when it is first exec'ed by initrd and then add these
> processes to a whitelist of sorts? Not sure how practical that would be
> or how much nannying you'd need to do (i.e. if the process dies and
> something else takes over it's now vacant pid), but it seems like a
> simpler approach (at least for every other app than systemd).
> 
> Obviously I'm sure I've missed something here :D

By default we actually want to kill the processes we inherit from the
initrd, i.e. stuff like Plymouth. Processes which want to survive our
killing spree need to make that fact clear, indepently of whether they
are from the initrd or not.

Lennart

-- 
Lennart Poettering - Red Hat, Inc.