[regression] 2.6.39-rc[1-3] fail to boot on G5 PowerMac

[Mikael Pettersson]

Benjamin Herrenschmidt writes:
 > 
 > > > Finally I tried using g5_defconfig with 2.6.39-rc3.  First boot
 > > > it did get to /sbin/init, but udev init took much longer than
 > > > normal and threw errors.  After a warm reboot the same kernel
 > > > hung as usual, this time before framebuffer init.
 > > > 
 > > > 2.6.38 works just fine.
 > > 
 > > Hrm, that must be new, I remember testing something around -rc1 on a
 > > similar machine and it worked fine. I'll see if I can find something
 > > out.
 > 
 > Ok so on a PowerMac7,3 here (dual 2.5Ghz and mostly same HW or at least
 > very similar) I can't reproduce your problem with a g5_defconfig.
 > 
 > Your config doesn't work well for me (I don't do modules, I netboot),
 > but after adding a few things to it, it seems to work fine as well. I
 > added radeonfb and the radeon DRM (not KMS) and I added eventfd, timerfd
 > and input events.
 > 
 > So I'm afraid I'm going to need you to bisect that one to find out what
 > exact change caused the breakage for you.

Thanks for checking.  I'll try a bisect later today.

/Mikael