zfs kernel panic, known incompatibilities with clang & CPUTYPE/COPTFLAGS?
peter at wemm.org
Wed Jun 12 22:11:00 UTC 2013
On Wed, Jun 12, 2013 at 1:39 PM, Dimitry Andric <dim at freebsd.org> wrote:
> On Jun 12, 2013, at 22:30, Alexander Leidinger <Alexander at Leidinger.net> wrote:
>> I try to update from a pre-clang world (r242511M) to "now" (r251618M).
>> The resulting kernel boots, but while starting some jails (with ezjail
>> from ports, so fairly late in the boot process) I get a kernel panic
>> (IIRC zfs trying to access page 0).
> If you are running on i386, it might be a stack overflow? Try
> increasing the stack a little, it might help in that case.
For i386 I'd be more inclined to suspect KVA exhaustion.
For non-PAE, as a shot in the dark, increase
.. the default is 256 for PAE. that increases kernel KVA from 1GB to 1.5GB.
For a PAE system, this number is multipled by 2, so a corresponding
change is 512 -> 768.
This is just a shot in the dark. If this is amd64, then never mind,
KVA_PAGES is meaningless there.
Peter Wemm - peter at wemm.org; peter at FreeBSD.org; peter at yahoo-inc.com; KI6FJV
On IRC, talking about C++:
<BigKnife> I think that it is a good thing I will never meet Bjarne on a street
<BigKnife> cause really, I don't want to end up in prison or anything
More information about the freebsd-current