Date: Mon, 30 Jul 2001 09:04:44 -0700 (PDT) From: John Baldwin <jhb@FreeBSD.org> To: Ian Dowse <iedowse@maths.tcd.ie> Cc: smp@FreeBSD.org, mjacob@feral.com Subject: Re: kaboom... Message-ID: <XFMail.010730090444.jhb@FreeBSD.org> In-Reply-To: <200107292350.aa62249@salmon.maths.tcd.ie>
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On 29-Jul-01 Ian Dowse wrote:
> In message <20010729153617.C44279-100000@wonky.feral.com>, Matthew Jacob
> writes
>:
>>Happened again once. It may be if I do 2 make -j 8 kernel builds I get this.
>>The panic is somewhere in exit1 where marked:
>
>> if ((p->p_pptr->p_procsig->ps_flag & PS_NOCLDWAIT)
>> || p->p_pptr->p_sigacts->ps_sigact[_SIG_IDX(SIGCHLD)] == SIG_IGN)
>
> Yeah, see my post to -current on friday ("SIGCHLD changes causing..").
> Matt Dillon is apparently looking into this, but I was able to find
> out that this is caused when the parent process is swapped out. It
> is ok to check p_procsig->ps_flag, but p_sigacts is in the struct
> user area that is inaccessible when the process is swapped out.
>
> Backing out kern_sig.c r1.125 and kern_exit.c r1.131 should fix it.
Ah.
> Ian
--
John Baldwin <jhb@FreeBSD.org> -- http://www.FreeBSD.org/~jhb/
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