RE: [Xen-ia64-devel][Patch]Add two PAL calls which fixSMPwindowsinstallation crashing bug

[Kouya SHIMURA <kouya@xxxxxxxxxxxxxx>]

Hi Wing,

According to SAL specification 3.2.5 OS_OOT_RENDEZ, 
"If OS_BOOT_RENDEZ returns a processor to the SAL using BR0, SAL will
re-enter the spin loop awaiting a wake-up by the BSP."

I guess that the windows installer uses only two cpus. The other cpus
kill themselves and never be revived (until reboot). 
I have no idea why the other cpus are waken up once...
Generally speaking, too many cpus might be useless for installing OS.

Thanks,
Kouya

Zhang, Xing Z writes:
 > Hi Kouya and Tristan:
 >      I still have a question. After "11.XEN stops the vcpu", APs wait in 
 > Xen, how does BSP wake up them again? I don't think BSP will send an IPI to 
 > them again.
 > In windows, seems BSP will wait a very short time for AP waking up. Whiles 
 > APs waked up, they will fall into a loop to wait another times waking up by 
 > BSP.
 > But this time, BSP use memory semaphore to do that but not an IPI. 
 > En, maybe something I lost, hope your comments.
 > 
 > Good good study,day day up ! ^_^
 > -Wing(zhang xin)
 >  
 > OTC,Intel Corporation
 > 
 > >-----Original Message-----
 > >From: xen-ia64-devel-bounces@xxxxxxxxxxxxxxxxxxx
 > >[mailto:xen-ia64-devel-bounces@xxxxxxxxxxxxxxxxxxx] On Behalf Of Kouya
 > >SHIMURA
 > >Sent: 2007