Re: Race condition? /tmp/net.ifaces and pre-pivot

[Seewer Philippe <philippe.seewer-omB+W0Dpw2o@public.gmane.org>]

Warren Togami wrote:
> I am running into an odd issue that is supposedto be impossible.
> 
> pre-pivot/20write-ifcfg.sh is often being run but fails to write 
> net.*.ifcfg files because /tmp/net.ifaces does not exist at that moment. 
>  The mount was otherwise successful, and rdbreak before switch_root sees 
> that /tmp/net.ifaces exists.
> 
> With plain "root=dhcp" with a NFS rootfs, it seems to never happen. 
> However with "root=dhcp bridge", perhaps 25-75% of the time it is 
> failing to write ifcfg files.
> 
> Some kind of race going on?  An inspection of the code seems to me that 
> /tmp/net.ifaces should have already been created prior to pre-pivot?

This is not entirely unexpected due to the asynchronousness of 
udev-events and the new initqueue/mount-loop.

The correct solution would be to move the whole call of netroot to the 
initqueue, which we'll have to do anyway when we start handling 
interface timeouts with arp.

> 
> Warren Togami
> wtogami-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org
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