From owner-freebsd-arm@FreeBSD.ORG Sun Mar 22 18:18:24 2015 Return-Path: Delivered-To: arm@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTPS id 497615F3 for ; Sun, 22 Mar 2015 18:18:24 +0000 (UTC) Received: from mail-n.franken.de (drew.ipv6.franken.de [IPv6:2001:638:a02:a001:20e:cff:fe4a:feaa]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (Client CN "mail-n.franken.de", Issuer "Thawte DV SSL CA" (not verified)) by mx1.freebsd.org (Postfix) with ESMTPS id 0A197FB1 for ; Sun, 22 Mar 2015 18:18:24 +0000 (UTC) Received: from dhcp-9c2f.meeting.ietf.org (dhcp-9c2f.meeting.ietf.org [31.133.156.47]) (Authenticated sender: macmic) by mail-n.franken.de (Postfix) with ESMTP id 6A5321C104D85; Sun, 22 Mar 2015 19:18:21 +0100 (CET) Content-Type: text/plain; charset=us-ascii Mime-Version: 1.0 (Mac OS X Mail 8.2 \(2070.6\)) Subject: Re: panic: pmap_demote_section: No l2_bucket for wired mapping From: Michael Tuexen In-Reply-To: <20150322181501.GA40209@ci0.org> Date: Sun, 22 Mar 2015 13:18:19 -0500 Content-Transfer-Encoding: quoted-printable Message-Id: References: <20150322151934.GA31108@ci0.org> <667A250D-91AC-4B81-97E3-4C351BB35577@freebsd.org> <20150322181501.GA40209@ci0.org> To: Olivier Houchard X-Mailer: Apple Mail (2.2070.6) Cc: "freebsd-arm@freebsd.org" X-BeenThere: freebsd-arm@freebsd.org X-Mailman-Version: 2.1.18-1 Precedence: list List-Id: "Porting FreeBSD to ARM processors." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 22 Mar 2015 18:18:24 -0000 > On 22 Mar 2015, at 13:15, Olivier Houchard wrote: >=20 > On Sun, Mar 22, 2015 at 01:05:43PM -0500, Michael Tuexen wrote: >>> On 22 Mar 2015, at 10:19, Olivier Houchard wrote: >>>=20 >>> On Sun, Mar 22, 2015 at 06:54:06AM -0500, Michael Tuexen wrote: >>>> Dear all, >>>>=20 >>>=20 >>> Hi Michael,=20 >>>=20 >>>> running head on a Raspberry Pi became unstable. When running >>>> r280329 for a while (the machine is exposed to the Internet, so >>>> ssh logins are continuously tried), the machine panics: >>>>=20 >>>> panic: pmap_demote_section: No l2_bucket for wired mapping >>>>=20 >>>> It might be related to >>>> https://svnweb.freebsd.org/changeset/base/280324 >>>>=20 >>>> Any idea what is going on? >>>>=20 >>>=20 >>> Doest backing rev 280324 out fixes it ? I'm at a loss as to why my = commit=20 >> OK, testing done. Backing out 280324 does NOT help. So the issue is = not related >> to this patch. >> Disabling superpages helps to work around the issue. >>=20 >=20 > Is there any specific workload on your RPi, beside getting ssh-scanned = ? No. I saw the problem by just letting it sitting around. Sometime it panics pretty fast (order of a minute after reboot). I can force it by doing a git pull on a large project (like wireshark). > Who has PID 15, and suffer such an unfortunate doom while trying to = demote > pages ? I think it is the pagedaemon. Best regards Michael >=20 > Regards, >=20 > Olivier >=20