BUG: 2.6.11-rc2 and -rc1 hang during boot on PowerMacs
mikpe at csd.uu.se
Tue Jan 25 19:56:25 EST 2005
Benjamin Herrenschmidt writes:
> On Mon, 2005-01-24 at 18:42 +0100, Mikael Pettersson wrote:
> > Benjamin Herrenschmidt writes:
> > > On Sun, 2005-01-23 at 11:43 +1100, Benjamin Herrenschmidt wrote:
> > >
> > > > I know about this problem, I'm working on a proper fix. Thanks for your
> > > > report.
> > >
> > > Can you send me the PVR value for both of these CPUs
> > > (cat /proc/cpuinfo) ? I can't find right now why they would lock up
> > > unless the default idle loop is _not_ run properly, that is for some
> > > reason, NAP or DOZE mode end up not beeing enabled. Can you send me
> > > your .config as well ?
> > === cpuinfo.emac ===
> > processor : 0
> > cpu : 7447/7457, altivec supported
> > clock : 1249MHz
> > revision : 1.1 (pvr 8002 0101)
> > bogomips : 830.66
> > machine : PowerMac6,4
> > motherboard : PowerMac6,4 MacRISC3 Power Macintosh
> > detected as : 287 (Unknown Intrepid-based)
> > pmac flags : 00000000
> > L2 cache : 512K unified
> > memory : 256MB
> > pmac-generation : NewWorld
> Ok, it's normal that the Beige G3 doesn't do NAP, and the 7455 cannot do
> DOZE, so I suspect it's all normal and my patch fixes it.
> However, the eMac should have been doing NAP. Can you check what's up in
> arch/ppc/plaform/pmac_feature.c with powersave_nap ? is it set at all ?
> It should be visible from userland at /proc/sys/kernel/powersave-nap
> and should be set to 1 by default on your machine... unless your cpu
> node in the device-tree has the "flush-on-lock" property...
On the eMac:
/proc/sys/kernel/powersave-nap exists and contains "0".
/proc/device-tree/cpus/PowerPC,G4/flush-on-lock exists as an empty file.
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