threads/103127: Kernel panic while using thread features in Squid 2.6

[Anders Nordby]

The following reply was made to PR kern/103127; it has been noted by GNATS.

From: Anders Nordby <anders at fupp.net>
To: FreeBSD-gnats-submit at FreeBSD.org, freebsd-threads at FreeBSD.org,
	Thomas-Martin Seck <tmseck at netcologne.de>,
	Suleiman Souhlal <ssouhlal at FreeBSD.org>,
	John-Mark Gurney <gurney_j at resnet.uoregon.edu>
Cc: jhb at FreeBSD.org
Subject: Re: threads/103127: Kernel panic while using thread features in Squid 2.6
Date: Mon, 18 Sep 2006 10:33:43 +0200

 Hi,
 
 On Sat, Sep 16, 2006 at 01:50:44PM -0700, John-Mark Gurney wrote:
 >> After talking with Pawel, I tried the attached patch to get some kqueue
 >> debug info. I just got it:
 >> 
 >> Sep 13 20:18:56 cache3 kernel: NULL f_event in new kn
 >> Sep 13 20:18:56 cache3 kernel: f_event == NULL
 > 
 > This means that the f_attach method for that event isn't setting f_event
 > properly...  We need to figure out which event this is happening w/...
 > 
 > Try the following modifications:
 >> (..)
 > > +			if (kn->kn_fop->f_event == NULL)
 >  {
 > > +				printf("NULL f_event in new kn\n");
 
 This modification was already done with the patch from Pawel, check the
 audit-trail of this PR. By using that patch, I got the messages "NULL
 f_event in new kn" and "f_event == NULL".
 
 Cheers,
 
 -- 
 Anders.