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From: Marcel Moolenaar <marcel@xcllnt.net>
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To: Anton Shterenlikht <mexas@bristol.ac.uk>
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Subject: Re: make test under lang/perl5.14 causes panic: blockable sleep
	lock (sleep mutex) process lock @ /usr/src/sys/ia64/ia64/trap.c:562
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On Aug 16, 2011, at 1:12 AM, Anton Shterenlikht wrote:

> On Mon, Aug 15, 2011 at 06:34:51PM +0100, Anton Shterenlikht wrote:
>> On Fri, Aug 12, 2011 at 05:45:55PM -0700, Marcel Moolenaar wrote:
>>>=20
>>> On Aug 12, 2011, at 7:19 AM, Anton Shterenlikht wrote:
>>>=20
>>>> On ia64 r221488
>>>=20
>>> Please update to at least r223700, as that was a major stability =
fix.
>>=20
>> UZI> uname -a
>> FreeBSD mech-as221.men.bris.ac.uk 9.0-BETA1 FreeBSD 9.0-BETA1 #5 =
r224876: Mon Aug 15 12:06:05 BST 2011     =
root@mech-as221.men.bris.ac.uk:/usr/obj/usr/src/sys/UZI  ia64
>> UZI>=20
>>=20
>> make test run with no panic once (though lots of errors,
>> I should probably let the perl team know), and
>> panicked on the second run:

Anton,

Do you have "options PREEMPTON" in your kernel configuration by any
chance?

The panics you report are the ones I typically get when I enable
PREEMPTION. I haven't found the root cause for this yet. There's
alsp a PR to track this particular issue.

FYI,

--=20
Marcel Moolenaar
marcel@xcllnt.net