RE: [Xen-devel] [PATCH] Re: SMP dom0 with 8 cpus of i386

["Kamble, Nitin A" <nitin.a.kamble@xxxxxxxxx>]

> Is this PAE or non-PAE?
 It is non-PAE.

> Please can you try forceing emulation mode by toggling the "#if 0" in
> arch/x86/mm.c ptwr_do_page_fault
  Emulation makes the dom0 very stable, I didn't see the issue with
emulation again. Earlier it is very consistent on the system.

> The other thing to try is modifying set_pte_pfn_ma to call
xen_l1_update
> rather than set_pte. You could try set_pte_at too.

> This will help narrow down the issue. 

I tried changing set_pte_mfs_ma to set_pte_at, and it also let dom0 boot
few times. I didn't have not observed the issue with it.

As it is a racing case kind of issue, I am not totally sure that it is
totally curing the issue. It can be possible we are just reducing the
chances of the race condition. Especially with emulation, the slowness
changes timing. 


Thanks & Regards,
Nitin
------------------------------------------------------------------------
-----------
Sr Software Engineer
Open Source Technology Center, Intel Corp


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