I suggest looking at my reply earlier to get gdb-xenserver going and
then try to do a bit of kernel debugging.

Sorry I can't be any further help at the moment. I hope someone else
can assist you!


Adrian

On 25 October 2010 23:48, Yuriy Kohut <yko...@onapp.com> wrote:
> The issue is 100% reproducible. Just got it ones more:
>
> Fatal trap 12: page fault while in kernel mode
> cpuid = 0; apic id = 00
> fault virtual address   = 0x8d78d0c
> fault code              = supervisor read, page not present
> instruction pointer     = 0x21:0xc00cbe2f
> stack pointer           = 0x29:0xe553f9e0
> frame pointer           = 0x29:0xe553f9f8
> code segment            = base 0x0, limit 0xf9800, type 0x1b
>                        = DPL 1, pres 1, def32 1, gran 1
> processor eflags        = interrupt enabled, resume, IOPL = 0
> current process         = 7297 (sendmail)
> [thread pid 7297 tid 100067 ]
> Stopped at      _mtx_lock_sleep+0x3f:   movl    0x1a4(%ecx),%eax
> ---
> Yura
>
> On Oct 25, 2010, at 5:59 PM, Yuriy Kohut wrote:
>
>> Hi,
>>
>> Just got fault in kernel while running 'make' in the port  
>> /usr/ports/lang/ghc:
>> ----
>> Fatal trap 12: page fault while in kernel mode
>> cpuid = 0; apic id = 00
>> fault virtual address = 0x1a4
>> fault code            = supervisor read, page not present
>> instruction pointer   = 0x21:0xc00cbe2f
>> stack pointer         = 0x29:0xc3db09e0
>> frame pointer         = 0x29:0xc3db09f8
>> code segment          = base 0x0, limit 0xf9800, type 0x1b
>>                       = DPL 1, pres 1, def32 1, gran 1
>> processor eflags      = interrupt enabled, resume, IOPL = 0
>> current process               = 19207 (sendmail)
>> [thread pid 19207 tid 100049 ]
>> Stopped at      _mtx_lock_sleep+0x3f:   movl    0x1a4(%ecx),%eax
>>
>>
>> db> where
>> Tracing pid 19207 tid 100049 td 0xc41e8c80
>> _mtx_lock_sleep(c079d808,c41e8c80,0,0,0,...) at _mtx_lock_sleep+0x3f
>> netisr_clearqdrops(c3db0a34,0,c4368700,c3db0a50,c018f210,...) at 
>> netisr_clearqdrops+0x34e
>> netisr_queue_src(1,0,c4368700,c3db0a78,c018a5a6,...) at netisr_queue_src+0x38
>> netisr_queue(1,c4368700,c3db0b04,c3db0b0c,c3db0a8c,...) at netisr_queue+0x20
>> if_simloop(c3f6b400,c4368700,2,0,c01a77df,...) at if_simloop+0xe6
>> looutput(c3f6b400,c4368700,c3db0b0c,c3db0b04,c3db0ac8,...) at looutput+0x121
>> ip_output(c4368700,0,0,0,0,...) at ip_output+0x98e
>> tcp_output(c42a39e0,c3f6ac70,c3db0c30,c00c8853,c42a39e0,...) at 
>> tcp_output+0x14bf
>> tcp_ctloutput(c41b6338,c3f6ac70,c41e8c80,c41b6338,c3db0c70,...) at 
>> tcp_ctloutput+0x2233
>> soconnect(c41b6338,c3f6ac70,c41e8c80,bf7fae70,c3f6ac70,...) at soconnect+0x52
>> kern_connect(c41e8c80,6,c3f6ac70,c3f6ac70,0,...) at kern_connect+0xa6
>> connect(c41e8c80,c3db0d08,c0324244,c3db0020,16,...) at connect+0x46
>> syscall(c3db0d48) at syscall+0x2d3
>> Xint0x80_syscall() at Xint0x80_syscall+0x22
>> --- syscall (98, FreeBSD ELF32, connect), eip = 0x283bd0cb, esp = 
>> 0xbf7fad0c, ebp = 0xbf7faf38 ---
>> ----
>>
>>
>> DomU details
>> FreeBSD 8.1-RELEASE-p1 #11
>> kernel config: /usr/src/sys/XEN i386
>> xen config:
>> ----
>> kernel = "/var/lib/xen/images/kernel.FDvzVcWQzfgX"
>> memory = "1504"
>> name = "FDvzVcWQzfgX"
>> vcpus = "1"
>> vid = "7"
>>
>> vif = [ 'mac=00:16:3e:bf:2e:2e, bridge=xenbr0, ip=0.0.0.0, 
>> vifname=FDvzVcWQzfgX, rate=0Mb/s' ]
>> disk = [ 'phy:/dev/iscsi_0_7,sda,w', 'phy:/dev/iscsi_0_127,sdb,w' ]
>>
>> extra = "boot_verbose=1"
>> extra += ",vfs.root.mountfrom=ufs:/dev/da0"
>> extra += ",kern.hz=100"----
>>
>>
>> Dom0 details
>> CentOS release 5.4 (Final)
>> Linux hv9-a-chi.vps.net 2.6.18-164.15.1.el5xen #1 SMP Wed Mar 17 12:04:23 
>> EDT 2010 x86_64 x86_64 x86_64 GNU/Linux
>> xen-3.0.3-94.el5_4.3
>>
>>
>> Appreciate any assistance.
>> Thanks
>> ---
>> Yura
>>
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