Re: Dom0 ballooning: crash on guest start

[Christoph Egger <Christoph_Egger%gmx.de@localhost>]

On 04/29/11 11:49, Jean-Yves Migeon wrote:
> On Fri, 29 Apr 2011 11:14:54 +0200, Christoph Egger wrote:
> > Then when I start a HVM guest the balloon driver crashes:
> >
> > balloon0: current reservation: 2039476 pages => target: 2039476 pages
> > balloon0: current reservation: 2039476 pages => target: 981172 pages
> > uvm_fault(0xffffffff80c6b220, 0xffffffff81400000, 1) -> e
> > fatal page fault in supervisor mode
> > trap type 6 code 0 rip ffffffff8054584d cs e030 rflags 10216 cr2
> > ffffffff81400000 cpl 0 rsp ffffa00057ca8a50
> > kernel: page fault trap, code=0
> > Stopped in pid 0.58 (system) at netbsd:pmap_zero_page+0x41: movq 0(%rax,%
> > rbx,8),%rbx
> > pmap_zero_page() at netbsd:pmap_zero_page+0x41
> > uvm_pagealloc_strat() at netbsd:uvm_pagealloc_strat+0x22d
> > bpge_ctor() at netbsd:bpge_ctor+0x22
>
> Hmm, a fault while zeroing the page. Race, TLB out of sync, or maybe
> developer's (my) mistake :o
>
> Is this kernel compiled with DIAGNOSTIC?

It is compiled with DEBUG + DIAGNOSTIC + LOCKDEBUG

Christoph