Re: [Xen-devel] Xen-unstable: xen panic RIP: dpci_softirq

[Andrew Cooper <andrew.cooper3@xxxxxxxxxx>]

On 14/11/14 13:32, Andrew Cooper wrote:
> On 14/11/14 13:11, Sander Eikelenboom wrote:
>> Hi Konrad / Jan,
>>
>> One of these commits:
>> - aeeea485bcfe2a517ed9bcb3ba1c3be0f6824e07 dpci: move from an hvm_irq_dpci 
>> (and struct domain) to an hvm_dirq_dpci model
>> - f6dd295381f4b6a66acddacf46bca8940586c8d8 pci: replace tasklet with softirq
>>
>> gives (running under 5 minutes of host boot, on AMD hardware and with guest 
>> with 
>> pci passthrough) the splat below.
>>
>> --
>> Sander
> I was hoping to get a chance to test this as well, but am currently
> blocked on other issues.
>
> Would you mind giving it a go at c/s aeeea485?  It is highly likely that
> the bug is in f6dd295, but it would be nice to confirm that it want a
> bug in the (hopefully noop) shuffling of the position of the tasklet.

Sorry - sent too soon.  I meant "..that it wasn't a bug in the.."

~Andrew

>> (XEN) [2014-11-14 13:00:06.810] ----[ Xen-4.5.0-rc  x86_64  debug=y  Not 
>> tainted ]----
>> (XEN) [2014-11-14 13:00:06.810] CPU:    3
>> (XEN) [2014-11-14 13:00:06.810] RIP:    e008:[<ffff82d080148f14>] 
>> dpci_softirq+0x9c/0x231
>> (XEN) [2014-11-14 13:00:06.810] RFLAGS: 0000000000010283   CONTEXT: 
>> hypervisor
>> (XEN) [2014-11-14 13:00:06.811] rax: 0000000000100100   rbx: 
>> ffff830515c86d90   rcx: 0000000000000001
>> (XEN) [2014-11-14 13:00:06.811] rdx: ffff83054ef30000   rsi: 
>> 0000000000000002   rdi: ffff830518b3b0b8
>> (XEN) [2014-11-14 13:00:06.811] rbp: ffff83054ef37eb0   rsp: 
>> ffff83054ef37e50   r8:  ffff830515c86d60
>> (XEN) [2014-11-14 13:00:06.811] r9:  0000016b62294400   r10: 
>> 0000016b63143e58   r11: 0000000000000246
>> (XEN) [2014-11-14 13:00:06.811] r12: ffff830515c86d38   r13: 
>> ffff830518b3b000   r14: ffff830515c86d28
>> (XEN) [2014-11-14 13:00:06.811] r15: ffff830515c86d28   cr0: 
>> 000000008005003b   cr4: 00000000000006f0
>> (XEN) [2014-11-14 13:00:06.811] cr3: 000000009fc92000   cr2: 0000000000100108
>> (XEN) [2014-11-14 13:00:06.811] ds: 0000   es: 0000   fs: 0000   gs: 0000   
>> ss: e010   cs: e008
>> (XEN) [2014-11-14 13:00:06.811] Xen stack trace from rsp=ffff83054ef37e50:
>> (XEN) [2014-11-14 13:00:06.811]    ffff83054ef37e60 ffff830518b3b0b8 
>> ffff830515c86d38 ffff83054ef37e70
>> (XEN) [2014-11-14 13:00:06.811]    ffff830515c86d90 ffff830515c86d90 
>> ffff83054ef37ef0 ffff82d080300100
>> (XEN) [2014-11-14 13:00:06.811]    ffff82d0802fff80 ffffffffffffffff 
>> ffff83054ef30000 0000000000000002
>> (XEN) [2014-11-14 13:00:06.811]    ffff83054ef37ee0 ffff82d08012bd91 
>> ffff83054ef30000 ffff83009faea000
>> (XEN) [2014-11-14 13:00:06.811]    00000000ffffffff ffff83054ef3e068 
>> ffff83054ef37ef0 ffff82d08012bde9
>> (XEN) [2014-11-14 13:00:06.811]    ffff83054ef37f10 ffff82d0801623d5 
>> ffff82d08012bde9 ffff83009fafd000
>> (XEN) [2014-11-14 13:00:06.811]    ffff83054ef37de8 ffffffff82200000 
>> ffffffff82200000 0000000000000000
>> (XEN) [2014-11-14 13:00:06.811]    0000000000000000 ffffffff82203e28 
>> ffffffff822f3ec0 0000000000000246
>> (XEN) [2014-11-14 13:00:06.811]    0000000000000001 0000000000000000 
>> 0000000000000000 0000000000000000
>> (XEN) [2014-11-14 13:00:06.811]    ffffffff810013aa ffffffff8221c520 
>> 00000000deadbeef 00000000deadbeef
>> (XEN) [2014-11-14 13:00:06.811]    0000010000000000 ffffffff810013aa 
>> 000000000000e033 0000000000000246
>> (XEN) [2014-11-14 13:00:06.811]    ffffffff82203e10 000000000000e02b 
>> 008000000000beef 000000000000beef
>> (XEN) [2014-11-14 13:00:06.811]    000000000000beef 00000000ffffbeef 
>> ffffea0000000003 ffff83009fafd000
>> (XEN) [2014-11-14 13:00:06.811]    00000034cec15280 0000000000000000
>> (XEN) [2014-11-14 13:00:06.811] Xen call trace:
>> (XEN) [2014-11-14 13:00:06.811]    [<ffff82d080148f14>] 
>> dpci_softirq+0x9c/0x231
>> (XEN) [2014-11-14 13:00:06.811]    [<ffff82d08012bd91>] 
>> __do_softirq+0x81/0x8c
>> (XEN) [2014-11-14 13:00:06.811]    [<ffff82d08012bde9>] do_softirq+0x13/0x15
>> (XEN) [2014-11-14 13:00:06.811]    [<ffff82d0801623d5>] idle_loop+0x5e/0x6e
>> (XEN) [2014-11-14 13:00:06.811] 
>> (XEN) [2014-11-14 13:00:06.811] Pagetable walk from 0000000000100108:
>> (XEN) [2014-11-14 13:00:06.811]  L4[0x000] = 000000055d09a063 
>> ffffffffffffffff
>> (XEN) [2014-11-14 13:00:06.811]  L3[0x000] = 000000055d099063 
>> ffffffffffffffff
>> (XEN) [2014-11-14 13:00:06.811]  L2[0x000] = 000000055d098063 
>> ffffffffffffffff 
>> (XEN) [2014-11-14 13:00:06.811]  L1[0x100] = 0000000000000000 
>> ffffffffffffffff
>> (XEN) [2014-11-14 13:00:07.692] 
>> (XEN) [2014-11-14 13:00:07.700] ****************************************
>> (XEN) [2014-11-14 13:00:07.720] Panic on CPU 3:
>> (XEN) [2014-11-14 13:00:07.732] FATAL PAGE FAULT
>> (XEN) [2014-11-14 13:00:07.745] [error_code=0000]
>> (XEN) [2014-11-14 13:00:07.759] Faulting linear address: 0000000000100108
>> (XEN) [2014-11-14 13:00:07.778] ****************************************
>> (XEN) [2014-11-14 13:00:07.797] 
>> (XEN) [2014-11-14 13:00:07.806] Reboot in five seconds...
>>
>>
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>
>
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