Brokenness in HEAD

[Nathan Whitehorn]

Garrett Cooper wrote:
> On Feb 25, 2009, at 8:21 AM, Nathan Whitehorn wrote:
>
>> Something seems to currently be quite broken in HEAD for PowerPC, at 
>> least on the AIM platform. I'm getting almost immediate panics all 
>> over the place in the kernel, usually indicating memory corruption 
>> somehow (faults on bogus addresses, illegal instructions, etc...). 
>> This is a heads-up to those thinking of updating systems or who might 
>> know what happened.
>>
>> The change is on order a week old, and I believe newer than the 20th. 
>> I have not done a full binary search yet, but it is not related to 
>> the following (checked by selective reversion of bits of the tree, or 
>> disabling bits):
>> - USB code
>> - ATA code
>> - Anything in sys/powerpc (the Altivec import in particular)
>> - Any changes to kernel compile flags or the contents of 
>> /usr/src/share/mk
>>
>> The panics seem to correlated with file system use (either UFS or 
>> NFS), but that may just be testing more code paths than a pure 
>> computational load.
>> -Nathan
>
> Could this be related to the USB4BSD changes?
> -Garrett
I don't think so. Running a kernel with no USB in it still crashed, 
along with one with no ATA, which has also seen a lot of changes lately.
-Nathan