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Hi guys,<br>
<br>
I ran into a problem with my SL 6.0 system kernel panic'ing, and
wondered if I could ask this community a couple of questions.<br>
<br>
My server had been crashing when I would switch away from it on my
KVM. This is pretty new, it just started a couple of months ago.
It would happen about 30% time -- switch to one of the other
servers, and the machine would freeze, then reboot.<br>
<br>
I ended up using the crash tools and after some google searches I
found what seems to be the problem, as described here:<br>
<br>
<a class="moz-txt-link-freetext" href="http://kernel.opensuse.org/cgit/kernel-source/commit/?id=74b37816afd7680c208cbc247ccfa5f3168e6b25">http://kernel.opensuse.org/cgit/kernel-source/commit/?id=74b37816afd7680c208cbc247ccfa5f3168e6b25</a><br>
<a class="moz-txt-link-freetext" href="https://bugzilla.novell.com/show_bug.cgi?id=679484">https://bugzilla.novell.com/show_bug.cgi?id=679484</a><br>
<br>
It turns out that its a crash that can happen when a usb sound
device is unplugged. (My kvm is a usb one, and there is a usb
headset plugged into it)<br>
<br>
The files that were fixed in future kernels were:<br>
<meta charset="utf-8">
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outline: 0px; font-size: 10px; background-color: rgb(254, 254,
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font-variant: normal; font-weight: normal; letter-spacing: normal;
line-height: normal; orphans: 2; text-align: -webkit-auto;
text-indent: 0px; text-transform: none; white-space: pre; widows:
2; word-spacing: 0px; -webkit-text-size-adjust: auto;
-webkit-text-stroke-width: 0px; background-position: initial
initial; background-repeat: initial initial; ">sound/usb/card.c</div>
<div class="add" style="margin: 0px; padding: 0px; border: 0px;
outline: 0px; font-size: 10px; background-color: rgb(254, 254,
254); color: green; font-family: monospace; font-style: normal;
font-variant: normal; font-weight: normal; letter-spacing: normal;
line-height: normal; orphans: 2; text-align: -webkit-auto;
text-indent: 0px; text-transform: none; white-space: pre; widows:
2; word-spacing: 0px; -webkit-text-size-adjust: auto;
-webkit-text-stroke-width: 0px; background-position: initial
initial; background-repeat: initial initial; ">sound/usb/pcm.c</div>
<div class="add" style="margin: 0px; padding: 0px; border: 0px;
outline: 0px; font-size: 10px; background-color: rgb(254, 254,
254); color: green; font-family: monospace; font-style: normal;
font-variant: normal; font-weight: normal; letter-spacing: normal;
line-height: normal; orphans: 2; text-align: -webkit-auto;
text-indent: 0px; text-transform: none; white-space: pre; widows:
2; word-spacing: 0px; -webkit-text-size-adjust: auto;
-webkit-text-stroke-width: 0px; background-position: initial
initial; background-repeat: initial initial; ">sound/usb/usbaudio.h<br>
<br>
My questions:<br>
Should these files be part of the alsa driver's package? I
installed it, but it didn't make any difference.<br>
<br>
If these are not part of the "alsa drivers", then is this a driver
that could be added to the elrepo repository? I'm not sure if this
(sound?) is considered a "driver" or some core kernel function.<br>
<br>
Thanks,<br>
Greg<br>
<br>
(PS - the backtrace of the kernel panic, in case anyone is
interested)<br>
<br>
PID: 3405 TASK: ffff880193dbb540 CPU: 3 COMMAND: "udev-acl"<br>
#0 [ffff8800282c38c0] machine_kexec at ffffffff8103214b<br>
#1 [ffff8800282c3920] crash_kexec at ffffffff810b91c2<br>
#2 [ffff8800282c39f0] oops_end at ffffffff814f0b00<br>
#3 [ffff8800282c3a20] no_context at ffffffff810423fb<br>
#4 [ffff8800282c3a70] __bad_area_nosemaphore at ffffffff81042685<br>
#5 [ffff8800282c3ac0] bad_area_nosemaphore at ffffffff81042753<br>
#6 [ffff8800282c3ad0] __do_page_fault at ffffffff81042e0d<br>
#7 [ffff8800282c3bf0] do_page_fault at ffffffff814f2ade<br>
#8 [ffff8800282c3c20] page_fault at ffffffff814efe95<br>
[exception RIP: snd_complete_urb+107]<br>
RIP: ffffffffa1146c1b RSP: ffff8800282c3cd8 RFLAGS: 00010002<br>
RAX: 0000000000000000 RBX: ffff8801090f1aa8 RCX: ffff88002400a610<br>
RDX: ffff880169d00a80 RSI: 0000000000000006 RDI: ffff880169d00a80<br>
RBP: ffff8800282c3cf8 R8: ffff880024000000 R9: 0000000000000000<br>
R10: 0000000000000000 R11: 0000000000000000 R12: ffff8801090f1b88<br>
R13: ffff880169d00a80 R14: 0000000000000000 R15: ffff8801b71f9c00<br>
ORIG_RAX: ffffffffffffffff CS: 0010 SS: 0000<br>
#9 [ffff8800282c3d00] usb_hcd_giveback_urb at ffffffff8139cc84<br>
#10 [ffff8800282c3d30] ehci_urb_done at ffffffff813b5950<br>
#11 [ffff8800282c3d60] ehci_work at ffffffff813b8b3a<br>
#12 [ffff8800282c3e00] ehci_irq at ffffffff813b98fa<br>
#13 [ffff8800282c3ec0] usb_hcd_irq at ffffffff8139bb0f<br>
#14 [ffff8800282c3ee0] handle_IRQ_event at ffffffff810d9740<br>
#15 [ffff8800282c3f30] handle_fasteoi_irq at ffffffff810dbfa8<br>
#16 [ffff8800282c3f60] handle_irq at ffffffff8100df09<br>
#17 [ffff8800282c3f80] do_IRQ at ffffffff814f535c<br>
--- <IRQ stack> ---<br>
#18 [ffff8801ba215f58] ret_from_intr at ffffffff8100ba53<br>
RIP: 00007fa413b06d2e RSP: 00007fffd2f5ccb0 RFLAGS: 00000202<br>
RAX: 000000000000006e RBX: 00007fffd2f5cdf0 RCX: 00007fa41361a628<br>
RDX: 0377c8f32d4bb962 RSI: 00007fa413d1bb20 RDI: 00007fa41361a61e<br>
RBP: ffffffff8100ba4e R8: 0000000000000000 R9: 0000000000000001<br>
R10: 0000000000000010 R11: 0000000000000000 R12: 00007fa4136a58b7<br>
R13: 0000000000000001 R14: 000000007fffffff R15: 0000000000000000<br>
ORIG_RAX: ffffffffffffffa6 CS: 0033 SS: 002b<br>
<br>
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