Re: xenmp testing

[Manuel Bouyer <bouyer%antioche.eu.org@localhost>]

On Thu, Jan 19, 2012 at 11:49:18AM +0530, Cherry G. Mathew wrote:
> On 19 January 2012 01:35, Manuel Bouyer <bouyer%antioche.eu.org@localhost> 
> wrote:
> > On Mon, Jan 09, 2012 at 01:18:35PM +0530, Cherry G. Mathew wrote:
> >> Hi,
> >>
> >> I'd like to call for participation and user feedback of xen MP on -current
> >>
> >> There are a few known bugs (clock drift, diagnostic message spam on
> >> console, etc.), but please feel free to file bugs and/or report here.
> >
> > On a amd64 domU with 4 CPUs I see under high load:
> > xpq_flush_queue: 1 entries (0 successful)
> > 0x0000000220a58010: 0x000000014d121067
> > panic: HYPERVISOR_mmu_update failed, ret: -22
> >
> > fatal breakpoint trap in supervisor mode
> > trap type 1 code 0 rip ffffffff80134585 cs e030 rflags 246 cr2  603000 cpl 
> > 6 rsp
> >  ffffa0004fc4af60
> > Stopped in pid 22483.1 (env) at netbsd:breakpoint+0x5:  leave
> > breakpoint() at netbsd:breakpoint+0x5
> > vpanic() at netbsd:vpanic+0x1f2
> > printf_nolog() at netbsd:printf_nolog
> > xpq_queue_machphys_update() at netbsd:xpq_queue_machphys_update
> > pmap_zero_page() at netbsd:pmap_zero_page+0xd6
> > uvm_pagealloc_strat() at netbsd:uvm_pagealloc_strat+0x3d8
> > uvmfault_promote() at netbsd:uvmfault_promote+0x138
> > uvm_fault_internal() at netbsd:uvm_fault_internal+0xaff
> > trap() at netbsd:trap+0x5f5
> >
> > And on xen console:
> > (XEN) mm.c:2424:d1 Bad type (saw 3400000000000001 != exp 7000000000000000) 
> > for mfn 20e43d (pfn 13727)
> 
> I've been having trouble deciphering what PGT_xxx flags are set via mm.h
> 
> > (XEN) mm.c:907:d1 Error getting mfn 20e43d (pfn 13727) from L1 entry 
> > 000000020e43d067 for l1e_owner=1, pg_owner=1
> >
> 
> 
> > I don't know yet if it's related to kern/45830
> >
> 
> There's a race where a pmap pm_pdir[] can have a lingering entry in
> per-cpu L4 pdirs if they have alternate mappings to that pmap. I've
> tried to solve it with this:
> 
> http://85.88.27.205/tmp/apte.diff
> 
> But yet to hear if that fixes the problem.
> 
> I'm not sure if these are related. Can it be tested ?

I tested, it doesn't help with my problem. 

-- 
Manuel Bouyer <bouyer%antioche.eu.org@localhost>
     NetBSD: 26 ans d'experience feront toujours la difference
--