Panic on boot with April 16 src (lengthy info attached)
rwatson at FreeBSD.org
Tue Apr 17 21:05:25 UTC 2007
On Tue, 17 Apr 2007, Tillman Hodgson wrote:
> On Tue, Apr 17, 2007 at 05:32:32PM +0100, Robert Watson wrote:
>> There's quite a bit of stuff in here, but I can speak to this one: Andre's
>> recent TCP timer change causes TCP to run without Giant when
>> debug.mpsafenet=0. This leads to panics with INVARIANTS, and non-MPSAFE
>> code running without Giant otherwise.
> Thanks Robert, that did indeed let me boot. I appreciate your help :-)
> I originally put it in there to work around a LOR that I was experiencing
> (based on you mentioning it in an email to current@ Sun 18 Mar 2007 15:50).
> http://sources.zabbadoz.net/freebsd/lor/191.html doesn't show any changes to
> that particular LOR, do you happen to know if there's any ongoing work on
> this? I'm very willing to act as a test system.
I chatted with Andre about the panic earlier this afternoon, and it sounds
like the fix is straight forward. I would anticipate seeing it committed in
the near future.
I'll send out an e-mail explaining the above lock order reversal tomorrow
morning. I understand that several people have been looking at this, so
perhaps one of those people will reply talking about it before then. :-)
Robert N M Watson
University of Cambridge
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