Memory corruption starting in i915 code, in 3.2-rc5

[Alex Villacís Lasso]

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.