Re: [Xen-devel] 2.6.32.27 dom0 - BUG: unable to handle kernel paging request

[Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>]

On Sun, Jan 09, 2011 at 01:07:26PM -0500, Christopher S. Aker wrote:
> On Jan 4, 2011, at 4:59 PM, Christopher S. Aker wrote:
> > 
> > I rebuilt with CONFIG_DEBUG_INFO, and surprisingly it appears valid at the 
> > same address:
> > 
> > # gdb vmlinux
> > (gdb) list *0xc1022781
> > 0xc1022781 is in vmalloc_sync_all 
> > (/build/xen/dom0/pv_ops/2.6.32.27-1-debug/arch/x86/include/asm/pgtable.h:434).
> > 429     #define pud_page(pud)           pfn_to_page(pud_val(pud) >> 
> > PAGE_SHIFT)
> > 430
> > 431     /* Find an entry in the second-level page table.. */
> > 432     static inline pmd_t *pmd_offset(pud_t *pud, unsigned long address)
> > 433     {
> > 434             return (pmd_t *)pud_page_vaddr(*pud) + pmd_index(address);
> > 435     }
> > 436
> > 437     static inline int pud_large(pud_t pud)
> > 438     {
> 
> We hit the BUG again on a third test box -- at least it's fairly easy to 
> reproduce.  Has anyone had a chance to poke at this, or have a suggestion for 
> something for me to try/test?

Which test makes it easy to reproduce? Oh wait, you have a whole bunch of guests
pounding. Is it possible to narrow down which type of test is causing this? Or 
can
you put up the domU guests along with the xm config files to try to reproduce 
this?

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