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

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Message-ID: <1291892412.30565.3.camel@vase>
Date:	Thu, 09 Dec 2010 14:00:12 +0300
From:	Vasiliy G Tolstov <v.tolstov@...fip.ru>
To:	Stefano Stabellini <stefano.stabellini@...citrix.com>
Cc:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"xen-devel@...ts.xensource.com" <xen-devel@...ts.xensource.com>,
	Jeremy Fitzhardinge <Jeremy.Fitzhardinge@...rix.com>
Subject: Re: [Xen-devel] [PATCH 0/2] Xen PV on HVM multiple PV consoles

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:

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@...fip.ru>
Selfip.Ru

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