Re: [Xen-devel] [PATCH 0/2] Xen PV on HVM multiple PV consoles

[Pasi Kärkkäinen <pasik@xxxxxx>]

On Thu, Dec 09, 2010 at 02:00:12PM +0300, Vasiliy G Tolstov wrote:
> On Tue, 2010-12-07 at 10:30 +0000, Stefano Stabellini wrote:
> > On Mon, 6 Dec 2010, Vasiliy G Tolstov wrote:
> > > On Mon, 2010-12-06 at 10:36 +0000, Stefano Stabellini wrote:
> > > 
> > > > 
> > > > Could you please add CONFIG_DEBUG_INFO=y to your kernel config, so that
> > > > we can see the name of the functions in the stack trace?
> > > > 
> > > 
> > > After add debug kernel not crushed. I'm test more expensive it now. Can
> > > You provide ps auxwww | grep qemu-dm after creating domain with two
> > > serial consoles? (sles does not have libxl, i want to write now wrapper
> > > to qemu-dm, after that try to compile rpm from spec to support libxl).
> > > 
> > 
> > There is no need for any special command line arguments to qemu-dm, it
> > is going to create as many PV serials as configured on xenstored by
> > libxl, give a look at tools/libxl/libxl.c:libxl_device_console_add.
> > The output of the serial is the one specified on the node "output" on
> > xenstore.
> 
> I reproduce kernel crush:
> 

You need to enable debugging options in your kernel so we can see function
names in the trace.

-- Pasi

> With attached config file kernel from jeremy stable-2.6.32.x boot ok and
> noisy debug info
> If i compile with this config from You branch stable-2.6.32-pvconsole
> kernel crushed. Nothing displays. Only xm dmesg says:
> 
> (XEN) d47:v0: unhandled page fault (ec=0000)
> (XEN) Pagetable walk from 0000000000000010:
> (XEN)  L4[0x000] = 000000083870a027 00000000000013f9
> (XEN)  L3[0x000] = 0000000000000000 ffffffffffffffff
> (XEN) domain_crash_sync called from entry.S
> (XEN) Domain 47 (vcpu#0) crashed on cpu#15:
> (XEN) ----[ Xen-4.0.0_21091_06-0.2.1  x86_64  debug=n  Not tainted ]----
> (XEN) CPU:    15
> (XEN) RIP:    e019:[<00000000c10aaa3f>]
> (XEN) RFLAGS: 0000000000000246   EM: 1   CONTEXT: pv guest
> (XEN) rax: 0000000000000000   rbx: 00000000c146f5a0   rcx:
> 00000000c1445298
> (XEN) rdx: 0000000000000000   rsi: 0000000000008000   rdi:
> 0000000000000000
> (XEN) rbp: 00000000c13f7e60   rsp: 00000000c13f7e34   r8:
> 0000000000000000
> (XEN) r9:  0000000000000000   r10: 0000000000000000   r11:
> 0000000000000000
> (XEN) r12: 0000000000000000   r13: 0000000000000000   r14:
> 0000000000000000
> (XEN) r15: 0000000000000000   cr0: 000000008005003b   cr4:
> 00000000000026f0
> (XEN) cr3: 000000083fe24000   cr2: 0000000000000010
> (XEN) ds: e021   es: e021   fs: 00d8   gs: 0000   ss: e021   cs: e019
> (XEN) Guest stack trace from esp=c13f7e34:
> (XEN)   00000000 c10aaa3f 0001e019 00010046 c10392d6 c1445298 c11d0e17
> 00000004
> (XEN)   c146f5a0 00000000 c14b0cd9 c13f7e70 c11d0e17 c146f5a0 00000000
> c13f7e78
> (XEN)   c11d0ed4 c13f7e98 c103936f c14b0cc8 004b0cc0 00000000 c14b0cd9
> 00000000
> (XEN)   c14b0cd9 c13f7ea8 c1495868 c14d215c c14b0ccd c13f7ebc c148541b
> c14b0ccd
> (XEN)   fffffffe 00000000 c13f7ef8 c1048703 c13f7ef8 00000000 c137df19
> 00000000
> (XEN)   0000000f 00000000 00000000 00000000 c14b0cd9 c14b0cdd 00000000
> c1480f40
> (XEN)   c1481900 c13f7f08 c14851fd 00000000 c14853d2 c13f7f10 c14853c6
> c13f7f94
> (XEN)   c148a282 c13f7f20 c13f7fa4 00000000 c104e01e 00000005 00000000
> 00000000
> (XEN)   00000000 00000000 00000098 205b7f4c 30202020 3030302e 5d303030
> c1050020
> (XEN)   c13f7f78 c1bb60d0 c13f7f68 00000024 00000000 c1bb60c0 c1bb5884
> c1394221
> (XEN)   00000000 c13f7fdc 00000000 c13f7f94 c10392f6 00000000 c13f7fdc
> 00000000
> (XEN)   c13f7fac c148562f c137e0bc c12b2020 c14b2c60 00000000 c13f7fb8
> c14850a2
> (XEN)   c21f8000 c13f7ffc c1487d4a 00000000 00000000 00000000 00000000
> 00000000
> (XEN)   00000000 00000000 1f898975 80980201 10100800 000106a5 00000000
> 00000000
> (XEN)   c21f8000 00000000 00000000
> (XEN) cpupool_rm_domain(dom=47,pool=0) n_dom 1
> (XEN) mm.c:2562:d0 Unknown domain '47'
> (XEN) mm.c:2562:d0 Unknown domain '47'
> (XEN) mm.c:2562:d0 Unknown domain '47'
> (XEN) mm.c:2562:d0 Unknown domain '47'
> 
> 
> 
> -- 
> Vasiliy G Tolstov <v.tolstov@xxxxxxxxx>
> Selfip.Ru
> 
> 
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