From owner-freebsd-stable@freebsd.org Sat Jan 14 11:40:21 2017 Return-Path: Delivered-To: freebsd-stable@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id DE772CAF1FC for ; Sat, 14 Jan 2017 11:40:21 +0000 (UTC) (envelope-from eugen@grosbein.net) Received: from hz.grosbein.net (hz.grosbein.net [78.47.246.247]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client CN "hz.grosbein.net", Issuer "hz.grosbein.net" (not verified)) by mx1.freebsd.org (Postfix) with ESMTPS id 7C4401F3B; Sat, 14 Jan 2017 11:40:21 +0000 (UTC) (envelope-from eugen@grosbein.net) Received: from eg.sd.rdtc.ru (root@eg.sd.rdtc.ru [62.231.161.221]) by hz.grosbein.net (8.15.2/8.15.2) with ESMTPS id v0EBeBYX038194 (version=TLSv1.2 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Sat, 14 Jan 2017 12:40:11 +0100 (CET) (envelope-from eugen@grosbein.net) X-Envelope-From: eugen@grosbein.net X-Envelope-To: markj@FreeBSD.org Received: from eg.sd.rdtc.ru (eugen@localhost [127.0.0.1]) by eg.sd.rdtc.ru (8.15.2/8.15.2) with ESMTP id v0EBe2a0039176; Sat, 14 Jan 2017 18:40:02 +0700 (KRAT) (envelope-from eugen@grosbein.net) Subject: Re: stable/11 debugging kernel unable to produce crashdump To: Mark Johnston References: <587928B3.2050607@grosbein.net> <20170113193726.GC77535@wkstn-mjohnston.west.isilon.com> Cc: FreeBSD Stable From: Eugene Grosbein Message-ID: <587A0E12.7070205@grosbein.net> Date: Sat, 14 Jan 2017 18:40:02 +0700 User-Agent: Mozilla/5.0 (X11; FreeBSD amd64; rv:38.0) Gecko/20100101 Thunderbird/38.4.0 MIME-Version: 1.0 In-Reply-To: <20170113193726.GC77535@wkstn-mjohnston.west.isilon.com> Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit X-Spam-Status: No, score=0.3 required=5.0 tests=BAYES_00, DATE_IN_FUTURE_96_Q, LOCAL_FROM autolearn=no autolearn_force=no version=3.4.1 X-Spam-Report: * 0.0 DATE_IN_FUTURE_96_Q Date: is 4 days to 4 months after Received: date * -2.3 BAYES_00 BODY: Bayes spam probability is 0 to 1% * [score: 0.0000] * 2.6 LOCAL_FROM From my domains X-Spam-Checker-Version: SpamAssassin 3.4.1 (2015-04-28) on hz.grosbein.net X-BeenThere: freebsd-stable@freebsd.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Production branch of FreeBSD source code List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 14 Jan 2017 11:40:22 -0000 > I suspect that this is because we only stop the scheduler upon a panic > if SMP is configured. Can you retest with the patch below applied? > > Index: sys/kern/kern_shutdown.c > =================================================================== > --- sys/kern/kern_shutdown.c (revision 312082) > +++ sys/kern/kern_shutdown.c (working copy) > @@ -713,6 +713,7 @@ > CPU_CLR(PCPU_GET(cpuid), &other_cpus); > stop_cpus_hard(other_cpus); > } > +#endif > > /* > * Ensure that the scheduler is stopped while panicking, even if panic > @@ -719,7 +720,6 @@ > * has been entered from kdb. > */ > td->td_stopsched = 1; > -#endif > > bootopt = RB_AUTOBOOT; > newpanic = 0; > > Indeed, my router is uniprocessor system and your patch really solves the problem. Now kernel generates crashdump just fine in case of panic. Please commit the fix, thanks! Eugene Grosbein