Memory corruption starting in i915 code, in 3.2-rc5

[Alex Villací­s Lasso]

El 11/12/11 16:29, Alex Villacís Lasso escribió:
> El 11/12/11 15:46, Keith Packard escribió:
>> On Sun, 11 Dec 2011 13:36:30 -0500, Alex Villacís Lasso<a_villacis at palosanto.com>  wrote:
>>> My system is a Fedora 16 x86_64 running self-compiled vanilla kernel
>>> (.config attached for -rc5). I am getting an apparent memory corruption
>>> that starts since linux 3.2-rc5. No such corruption was noticed in
>>> 3.2-rc4. On the first instance, I eventually got a NULL pointer
>>> dereference and the screen went black, the keyboard was unresponsive,
>>> and I had to hard-reboot the machine. On the second instance, I managed
>>> to reboot the machine normally. The full message log is attached. An
>>> extract of the first WARNING:
>> The only patch in the i915 code between rc4 and rc5 is a tiny VT-d
>> workaround fix for ILK machines, which does fiddle with how the request
>> linked lists are managed.
>>
>> Can you try reverting eb1711bb94991e93669c5a1b5f84f11be2d51ea1 and see
>> if your problem goes away?
>>
> Recompiled kernel with patch reverted, testing right now.
Ran kernel with reverted patch for 6 hours without issues so far. Will keep testing after work (issue happens with my home machine).