[systemd-devel] [PATCH] fstab-generator: If we wait indefinitely for a mount, wait also for the device

[Lennart Poettering]

On Fri, 01.03.13 15:33, Harald Hoyer (harald at redhat.com) wrote:

> 
> Am 01.03.2013 15:30, schrieb Lennart Poettering:
> > On Fri, 01.03.13 15:13, harald at redhat.com (harald at redhat.com) wrote:
> > 
> >> From: Harald Hoyer <harald at redhat.com>
> >>
> >> Write out "JobTimeoutSec=0" for the device the mountpoint (which does
> >> not timeout) waits for.
> >>
> >> This helps with grabbing a cup of coffee while booting and not have
> >> the crypto password dialog timeout and systemd in a failed state.
> > 
> > Hmm, this hooks into "wait", which is initialized from the kernel
> > cmdline rootwait? What are the precise semantics of the kernel there
> > regarding this flag, in a non-initrd case? We probably should mimic the
> > kernel here is good as we can...
> > 
> > So, in the non-initrd case: what does rootwait do on the kernel cmdline?
> > And what happens if it is not used?
> 
>         rootwait        [KNL] Wait (indefinitely) for root device to show up.
>                         Useful for devices that are detected asynchronously
>                         (e.g. USB and MMC devices).

Yeah, that's what I read, too, but I cannot make sense of it. See above:
what is different from when it is not used? Or to be precise: what does
the kernel precisely do when rootwait is *not* passed?

Lennart

-- 
Lennart Poettering - Red Hat, Inc.