Re: [Xen-devel] [PATCH v1 for-xen-4.5] Fix list corruption in dpci_softirq.

[Sander Eikelenboom <linux@xxxxxxxxxxxxxx>]

Wednesday, November 19, 2014, 6:31:39 PM, you wrote:

> Hey,

> This patch should fix the issue that Sander had seen. The full details
> are in the patch itself. Sander, if you could - please test origin/staging
> with this patch to make sure it does fix the issue.


>  xen/drivers/passthrough/io.c | 27 +++++++++++++++++----------

> Konrad Rzeszutek Wilk (1):
>       dpci: Fix list corruption if INTx device is used and an IRQ timeout is 
> invoked.

>  1 file changed, 17 insertions(+), 10 deletions(-)


Hi Konrad,

Hmm just tested with a freshly cloned tree .. unfortunately it blew up again.
(i must admit i also re-enabled stuff i had disabled in debugging like, 
cpuidle, cpufreq). 

(XEN) [2014-11-19 18:41:25.999] ----[ Xen-4.5.0-rc  x86_64  debug=y  Not 
tainted ]----
(XEN) [2014-11-19 18:41:25.999] CPU:    5
(XEN) [2014-11-19 18:41:25.999] RIP:    e008:[<ffff82d0801490ac>] 
dpci_softirq+0x9c/0x23d
(XEN) [2014-11-19 18:41:25.999] RFLAGS: 0000000000010283   CONTEXT: hypervisor
(XEN) [2014-11-19 18:41:25.999] rax: 0100100100100100   rbx: ffff8303bb688d90   
rcx: 0000000000000001
(XEN) [2014-11-19 18:41:25.999] rdx: ffff83054ef18000   rsi: 0000000000000002   
rdi: ffff83050b29e0b8
(XEN) [2014-11-19 18:41:25.999] rbp: ffff83054ef1feb0   rsp: ffff83054ef1fe50   
r8:  ffff8303bb688d60
(XEN) [2014-11-19 18:41:25.999] r9:  000001d5f62fff63   r10: 00000000deadbeef   
r11: 0000000000000246
(XEN) [2014-11-19 18:41:25.999] r12: ffff8303bb688d38   r13: ffff83050b29e000   
r14: ffff8303bb688d28
(XEN) [2014-11-19 18:41:25.999] r15: ffff8303bb688d28   cr0: 000000008005003b   
cr4: 00000000000006f0
(XEN) [2014-11-19 18:41:25.999] cr3: 000000050b2c7000   cr2: ffffffffff600400
(XEN) [2014-11-19 18:41:25.999] ds: 002b   es: 002b   fs: 0000   gs: 0000   ss: 
e010   cs: e008
(XEN) [2014-11-19 18:41:25.999] Xen stack trace from rsp=ffff83054ef1fe50:
(XEN) [2014-11-19 18:41:25.999]    0000000000000c23 ffff83050b29e0b8 
ffff8303bb688d38 ffff83054ef1fe70
(XEN) [2014-11-19 18:41:25.999]    ffff8303bb688d90 ffff8303bb688d90 
000000fb00000000 ffff82d080300200
(XEN) [2014-11-19 18:41:25.999]    ffff82d0802fff80 ffffffffffffffff 
ffff83054ef18000 0000000000000002
(XEN) [2014-11-19 18:41:25.999]    ffff83054ef1fee0 ffff82d08012be31 
ffff83054ef18000 ffff83009fd2d000
(XEN) [2014-11-19 18:41:25.999]    00000000ffffffff ffff83054ef28068 
ffff83054ef1fef0 ffff82d08012be89
(XEN) [2014-11-19 18:41:25.999]    ffff83054ef1ff10 ffff82d0801633e5 
ffff82d08012be89 ffff83009ff8b000
(XEN) [2014-11-19 18:41:25.999]    ffff83054ef1fde8 ffff880059bf8000 
ffff880059bf8000 0000000000000000
(XEN) [2014-11-19 18:41:25.999]    0000000000000000 ffff880059bfbeb0 
ffffffff822f3ec0 0000000000000246
(XEN) [2014-11-19 18:41:25.999]    0000000000000001 0000000000000000 
0000000000000000 0000000000000000
(XEN) [2014-11-19 18:41:25.999]    ffffffff810013aa ffff880059bde480 
00000000deadbeef 00000000deadbeef
(XEN) [2014-11-19 18:41:25.999]    0000010000000000 ffffffff810013aa 
000000000000e033 0000000000000246
(XEN) [2014-11-19 18:41:25.999]    ffff880059bfbe98 000000000000e02b 
1862060042c8beef 224d41480704beef
(XEN) [2014-11-19 18:41:25.999]    99171042639bbeef 74c88180108cbeef 
c0dc604c00000005 ffff83009ff8b000
(XEN) [2014-11-19 18:41:26.000]    00000034cebff280 ca836183a4020303
(XEN) [2014-11-19 18:41:26.000] Xen call trace:
(XEN) [2014-11-19 18:41:26.000]    [<ffff82d0801490ac>] dpci_softirq+0x9c/0x23d
(XEN) [2014-11-19 18:41:26.000]    [<ffff82d08012be31>] __do_softirq+0x81/0x8c
(XEN) [2014-11-19 18:41:26.000]    [<ffff82d08012be89>] do_softirq+0x13/0x15
(XEN) [2014-11-19 18:41:26.000]    [<ffff82d0801633e5>] idle_loop+0x5e/0x6e
(XEN) [2014-11-19 18:41:26.000] 
(XEN) [2014-11-19 18:41:26.778] 
(XEN) [2014-11-19 18:41:26.787] ****************************************
(XEN) [2014-11-19 18:41:26.806] Panic on CPU 5:
(XEN) [2014-11-19 18:41:26.819] GENERAL PROTECTION FAULT
(XEN) [2014-11-19 18:41:26.834] [error_code=0000]
(XEN) [2014-11-19 18:41:26.847] ****************************************
(XEN) [2014-11-19 18:41:26.867] 
(XEN) [2014-11-19 18:41:26.876] Reboot in five seconds...
(XEN) [2014-11-19 18:41:26.891] APIC error on CPU0: 00(08)
(XEN) [2014-11-19 18:41:26.906] APIC error on CPU0: 08(08)


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