8.0-RC1 panic attaching ppc
alc at cs.rice.edu
Mon Sep 28 17:25:17 UTC 2009
Daniel O'Connor wrote:
> On Sun, 27 Sep 2009, Alan Cox wrote:
>> Ok, now I can explain what is happening. The kernel is using 1GB
>> pages to implement the direct map. Unfortunately, pmap_extract()
>> doesn't know how to handle a 1GB page mapping. pmap_kextract() only
>> works by an "accident" of its different implementation. In other
>> words, it should not be relied upon to work either.
>> Please revert whatever patch John gave you and try the attached
>> patch. It simply disables the use of 1GB page mapping by the direct
> Your patch fixes (works around?) the problem.
Thanks. I've committed the patch.
Yes, it's a work around. Fortunately(?), on my test machine, I don't
see any measurable effect from disabling the use of 1GB pages by the
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