Date: Sat, 16 Sep 2006 21:00:46 GMT From: John-Mark Gurney <gurney_j@resnet.uoregon.edu> To: freebsd-threads@FreeBSD.org Subject: Re: threads/103127: Kernel panic while using thread features in Squid 2.6 Message-ID: <200609162100.k8GL0kGi032099@freefall.freebsd.org>
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The following reply was made to PR kern/103127; it has been noted by GNATS.
From: John-Mark Gurney <gurney_j@resnet.uoregon.edu>
To: Anders Nordby <anders@fupp.net>
Cc: FreeBSD-gnats-submit@FreeBSD.org, freebsd-threads@FreeBSD.org,
Thomas-Martin Seck <tmseck@netcologne.de>,
Suleiman Souhlal <ssouhlal@FreeBSD.org>
Subject: Re: threads/103127: Kernel panic while using thread features in Squid 2.6
Date: Sat, 16 Sep 2006 13:50:44 -0700
Anders Nordby wrote this message on Wed, Sep 13, 2006 at 20:58 +0200:
> 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:
> --- sys/kern/kern_event.c.orig Wed Sep 13 08:44:57 2006
> +++ sys/kern/kern_event.c Wed Sep 13 08:51:03 2006
> @@ -900,6 +900,8 @@
> goto done;
> }
> KN_LIST_LOCK(kn);
> + if (kn->kn_fop->f_event == NULL)
{
> + printf("NULL f_event in new kn\n");
printf("kn: ident: %d, filter: %d\n", kn->kn_ident, kn->kn_filter);
}
> } else {
> /*
> * The user may change some filter values after the
I have a feeling that this is a similar panic that jhb is seeing...
Which means that filter will be EVFILT_VNODE (-4)...
--
John-Mark Gurney Voice: +1 415 225 5579
"All that I will do, has been done, All that I have, has not."
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