Messages in this thread | | | Date | Tue, 29 Jul 2008 14:46:38 -0700 | From | Nishanth Aravamudan <> | Subject | Re: s390 hugetlb oops with libhugetlbfs test-suite |
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On 29.07.2008 [19:22:43 +0200], Gerald Schaefer wrote: > On Fri, 2008-07-25 at 20:41 -0700, Nishanth Aravamudan wrote: > > Odd, this is the same kernel as last time, which wasn't tainted. The reason for > > the taint is the following: > > > > ------------[ cut here ]------------ > > Badness at drivers/s390/cio/qdio_main.c:1361 > > Hi, > > This was fixed by our qdio developer recently, but the fix is not yet > upstream. However, I doubt that this is related to the hugetlbfs problem.
Yeah, it didn't seem related, and the first dump I posted didn't trigger that badness.
> I was able to reproduce the "Bad page state", with the current libhugetlbfs > development snapshot and your patch for s390. It only happened on machines > with software large page emulation, but we certainly have a problem there. > Thanks for reporting this bug and adding s390 support to libhugetlbfs, I > will look into this problem.
Just FYI, I've merged up the patch that adds support and it is in the latest development snapshot of libhugetlbfs: http://libhugetlbfs.ozlabs.org/snapshots/libhugetlbfs-dev-20080729.tar.gz. Beyond the counters case, I saw one other issue on s390 (haven't confirmed if it happens anywhere else), the icache-hygiene test, when run manually a few times, will fail every so often claiming that one of the mmap()s returned ENOMEM. I haven't had time to track that down yet, but it might be because of the address space layout and the size of the hugepage on s390.
Thanks, Nish
-- Nishanth Aravamudan <nacc@us.ibm.com> IBM Linux Technology Center
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