Re: [sparc64] [panic] cheetah_ipi_selected: CPU can't IPI itself

On Mon, Jun 28, 2010 at 10:25:15AM -0400, Nathaniel W Filardo wrote:
> Well, I'm back in the same town as my sparc64 and so csup'd, built, and
> rebooted, trying to get more information about the "vm object not owned"
> panic I reported a while ago.  To my dismay, I now get this panic, also late
> enough in the boot process to be starting up jails:
> 
> panic: cheetah_ipi_selected: CPU can't IPI itself
> cpuid = 0
> KDB: stack backtrace:
> panic() at panic+0x1c8
> cheetah_ipi_selected() at cheetah_ipi_selected+0x48
> tlb_page_demap() at tlb_page_demap+0xdc
> pmap_copy_page() at pmap_copy_page+0x4c4
> vm_fault() at vm_fault+0x13ec
> trap_pfault() at trap_pfault+0x190
> trap() at trap+0xd0
> -- data access protection tar=0x224b93 sfar=0x224550 sfsr=0x800005
> %o7=0x4063398c --
> userland() at 0x40633830
> user trace: trap %o7=0x4063398c
> ...
> 
> And the system hangs; I had to use the ALOM to reboot it.
> Sorry to not have more useful news.

Could please give the following patch a try?
http://people.freebsd.org/~marius/sparc64_pin_ipis.diff
If that doesn't fix the above panic I have no clue how this can
happen apart from the per-CPU pages getting corrupted.

Marius