Re: 2.6.14 X spinning in the kernel

[Max Krasnyansky <maxk@qualcomm.com>]

Badari Pulavarty wrote:
>> Badari Pulavarty <pbadari@us.ibm.com> wrote:
>>
>>> On Mon, 2005-11-14 at 16:17 -0800, Andrew Morton wrote:
>>>
>>>> Badari Pulavarty <pbadari@us.ibm.com> wrote:
>>>>
>>>>> My 2-cpu EM64T machine started showing this problem again on 2.6.14.
>>>>> On some reboots, X seems to spin in the kernel forever.
>>>>>
>>>>> sysrq-t output shows nothing.
>>>>>
>>>>> X             R  running task       0  3607   3589          3903
>>>>> (L-TLB)
>>>>>
>>>>> top shows:
>>>>> 3607 root      25   0     0    0    0 R 99.1  0.0 262:04.69 X
>>>>>
>>>>>
>>>>> So, I wrote a module to do smp_call_function() on all CPUs
>>>>> to show stacks on them. CPU0 seems to be spinning in exit_mmap().
>>>>> I did this multiple times to collect stacks few times.
>>>>>
>>>>> Is this a known issue ?

I've seen similar problems on dual Opteron HP xw9300/Radeon 7000 PCI box with 2.6.11.12
and latest X from Fedora x86-64 YUM repos.
I haven't done any traces but it sounds like the same problem (ie X server is spinning).
Disabling DRI in xorg.conf fixed it for me.

Max