Re: [Xen-devel] Re: [xen-unstable test] 6289: regressions - FAIL

[George Dunlap <George.Dunlap@xxxxxxxxxxxxx>]

Hmm, what's our policy on adding debugging patches this late in the cycle?

The addition of a one-line BUG_ON() in another place in the code might
help next time this happens; printing out more information when this
happens would be nice as well.

 -George

On Wed, Mar 2, 2011 at 5:13 PM, Ian Jackson <Ian.Jackson@xxxxxxxxxxxxx> wrote:
> Ian Jackson writes ("[xen-unstable test] 6289: regressions - FAIL"):
>> test-amd64-xcpkern-i386-xl-credit2 10 guest-saverestore  fail REGR. vs. 6288
>
> Xen crash in credit2 code.
>
> Ian.
>
> Mar  2 15:35:31.195760 (XEN) csched_vcpu_insert: Inserting d2v3
> Mar  2 15:35:31.195786 (XEN) Xen BUG at sched_credit2.c:1606
> Mar  2 15:35:38.766789 (XEN) ----[ Xen-4.1.0-rc7-pre  x86_64  debug=y  Not 
> tainted ]----
> Mar  2 15:35:38.766829 (XEN) CPU:    8
> Mar  2 15:35:38.778761 (XEN) RIP:    e008:[<ffff82c48011b86a>] 
> csched_schedule+0x151/0xac9
> Mar  2 15:35:38.778794 (XEN) RFLAGS: 0000000000010007   CONTEXT: hypervisor
> Mar  2 15:35:38.790766 (XEN) rax: ffff830226f12000   rbx: ffff830226e03e30   
> rcx: 0000000000000000
> Mar  2 15:35:38.790801 (XEN) rdx: ffff8301a7fe0010   rsi: ffff82c480249780   
> rdi: ffff8300d7ad2000
> Mar  2 15:35:38.802790 (XEN) rbp: ffff8301a7e9fe38   rsp: ffff8301a7e9fd28   
> r8:  0000000000000001
> Mar  2 15:35:38.814768 (XEN) r9:  0000000000000005   r10: ffff8300d7ad2030   
> r11: 00000055197f6700
> Mar  2 15:35:38.814809 (XEN) r12: ffff8301a7fe02d0   r13: 0000000000000000   
> r14: ffff8301a7ea4060
> Mar  2 15:35:38.822777 (XEN) r15: 0000000000000008   cr0: 000000008005003b   
> cr4: 00000000000006f4
> Mar  2 15:35:38.831784 (XEN) cr3: 00000001a7e12000   cr2: 00000000b78891cd
> Mar  2 15:35:38.831815 (XEN) ds: 007b   es: 007b   fs: 00d8   gs: 0000   ss: 
> 0000   cs: e008
> Mar  2 15:35:38.846770 (XEN) Xen stack trace from rsp=ffff8301a7e9fd28:
> Mar  2 15:35:38.846799 (XEN)    ffffffff00000206 ffff8301a7fe0010 
> ffff8301a7fe0238 ffff8301a7fe02d4
> Mar  2 15:35:38.855776 (XEN)    0000005518e697c4 ffff82c480249780 
> ffff8301a7e9fe68 0000000000000001
> Mar  2 15:35:38.863764 (XEN)    ffff8301a7e9fdc8 ffff82c480122b07 
> ffff8301a7e9fdc8 ffff82c4802d3ec0
> Mar  2 15:35:38.863800 (XEN)    ffff82c4802d3ec0 ffff8300d7ad2000 
> 0000000000000246 ffff8301a7fe02d4
> Mar  2 15:35:38.875776 (XEN)    ffff82c4802d3ec0 ffff8301a7fe0010 
> ffff82c4802c27c0 ffff8300d7ad2000
> Mar  2 15:35:38.887766 (XEN)    ffff8301a7e9fdf8 ffff82c480122f89 
> ffff8301a7ea4060 ffff8301a7e9fdf8
> Mar  2 15:35:38.887801 (XEN)    ffff82c480125eed 0000000000000008 
> ffff8301a7e9fe38 0000000000000082
> Mar  2 15:35:38.902777 (XEN)    0000000000000082 0000000000000000 
> ffff8300d7ad2000 ffff82c480249780
> Mar  2 15:35:38.907768 (XEN)    ffff8301a7ea4060 ffff8301a7ea4040 
> ffff8301a7e9feb8 ffff82c480121fd2
> Mar  2 15:35:38.907809 (XEN)    ffff8301a7e9fec0 0000005518e697c4 
> 0000000000000000 00000000c04520a0
> Mar  2 15:35:38.922781 (XEN)    ffff830226f12000 0000000000000006 
> ffff8301a7e9fef8 ffff82c4801380a8
> Mar  2 15:35:38.934774 (XEN)    0000000000000000 0000000000000008 
> 0000000000000008 ffff82c4802b0880
> Mar  2 15:35:38.934809 (XEN)    ffff8301a7e9ff18 ffffffffffffffff 
> ffff8301a7e9fef8 ffff82c480123627
> Mar  2 15:35:38.943781 (XEN)    0000000000000000 ffff8300d7ad2000 
> 0000000000000000 0000000000000000
> Mar  2 15:35:38.954769 (XEN)    0000000000000000 0000000000000000 
> ffff8301a7e9ff08 ffff82c4801236a2
> Mar  2 15:35:38.954808 (XEN)    00007cfe581600c7 ffff82c480211e86 
> 0000000000000000 0000000000000000
> Mar  2 15:35:38.963789 (XEN)    0000000000000000 0000000000000000 
> 00000000c8061f40 00000000deadbeef
> Mar  2 15:35:38.975779 (XEN)    0000000000000000 0000000000000000 
> 0000000000000000 0000000000000000
> Mar  2 15:35:38.990772 (XEN)    0000000000000000 00000000deadbeef 
> 00000000deadbeef 0000000000000000
> Mar  2 15:35:38.990814 (XEN)    00000000c04f3020 0000010000000000 
> 00000000c0101307 0000000000000061
> Mar  2 15:35:38.995826 (XEN) Xen call trace:
> Mar  2 15:35:38.995841 (XEN)    [<ffff82c48011b86a>] 
> csched_schedule+0x151/0xac9
> Mar  2 15:35:39.007767 (XEN)    [<ffff82c480121fd2>] schedule+0x12a/0x624
> Mar  2 15:35:39.007797 (XEN)    [<ffff82c480123627>] __do_softirq+0x88/0x99
> Mar  2 15:35:39.022765 (XEN)    [<ffff82c4801236a2>] do_softirq+0x6a/0x7a
> Mar  2 15:35:39.022795 (XEN)
> Mar  2 15:35:39.022813 (XEN)
> Mar  2 15:35:39.022824 (XEN) ****************************************
> Mar  2 15:35:39.031765 (XEN) Panic on CPU 8:
> Mar  2 15:35:39.031787 (XEN) Xen BUG at sched_credit2.c:1606
> Mar  2 15:35:39.031811 (XEN) ****************************************
> Mar  2 15:35:39.038756 (XEN)
> Mar  2 15:35:39.038770 (XEN) Reboot in five seconds...
>
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