On Tue, 2008-04-15 at 10:35 +0200, Alan Pevec wrote: > Jeremy Katz wrote: > > On Tue, 2008-04-15 at 00:51 +0200, Alan Pevec wrote: > >> mkliveinitrd: wait for udev queue to clear before killing udevd > >> > >> udevd doesn't seem to cleanup on kill, so let it clear events from > >> /dev/.udev/queue/ > >> > >> Or should this be filed as udevd bug (cleanup .udev/queue/ on startup > >> and/or kill) ? > > > > We've already done one udevsettle for 30 seconds -- how does this any > > more guarantee that things are cleared? I suspect this should probably > > We do dmsetup etc. in the meantime so more udev events appear. And if all is > good, it won't hang 30 sec, it continues immediately.
There's no guarantee that 30 seconds is enough, though. > btw, we have unconditional 5s sleep here: > http://git.fedorahosted.org/git/?p=mkinitrd;a=blob;f=mkliveinitrd;h=84fcc8036d47613e33c6f3c79003900ae7b6fcae;hb=HEAD#l653 > Can we remove that? I'd rather not -- it's the only time and way that anyone can tell whether they're using a persistent or a temporary overlay right now. Longer term, I'd like to integrate something better into the desktop session, but that's less easy to do than might be hoped. > > be handled in udev. But what exactly are you seeing as the symptom? > > start_udev after switching root times out (after default 180s) on its > udevsettle and after boot is finished, I still see an event > /devices/virtual/block/dm-1 in exported queue /dev/.udev/queue/ - I assume > this is b/c we killed previous instance of udevd before event could be > cleared. > It's a race condition - for me it shows up when PXE booting oVirt liveCD > (created with livecd-iso-to-pxeboot), never when booting the same ISO > directly (both F9 KVM guests on F8 host). If I add eshell, which pauses just > before killing udevd, event is cleared. > > I agree this might be seen as a workaround but killing udevd just like that > doesn't seem polite. > Then again udevd should prolly clear its exported queue on startup, so I'm > CCing Harald to weigh in. This really feels like the better answer. It's not going to leave the possibility that 30 seconds isn't long enough Jeremy -- Fedora-livecd-list mailing list [email protected] https://www.redhat.com/mailman/listinfo/fedora-livecd-list
