On Fri, 2009-09-25 at 12:22 +0900, Tejun Heo wrote: > Benjamin Herrenschmidt wrote: > >> --- Exception: 301 at .memset+0x60/0xfc > >> LR = .pcpu_alloc+0x718/0x8fc > > > > So it's memsetting something that causes it to hash_page(), ie, faulting > > in pages (vmalloc space ?) so far nothing obviously wrong.... > > It's probably memset() call near the end of pcpu_populate_chunk() > where percpu allocator clears the allocated areas before returning to > user. I don't think the first chunk is causing the problem as they're > all in the linear mapped area. From the second chunk on, they're on > vmalloc area and very near to the top of it, so that might be exposing > a hidden problem in paging code? BTW, for some reason, the problem is > not reproducible on my powerstation.
That's indeed a possibility, though it would be strange... Definitely worth looking at your logs, and I'll check with Sachin about getting on the machine after that if I need to dig more. Cheers, Ben. _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@lists.ozlabs.org https://lists.ozlabs.org/listinfo/linuxppc-dev
