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...
 
Ben.