From owner-freebsd-arm@freebsd.org Sat Oct 7 02:46:31 2017 Return-Path: Delivered-To: freebsd-arm@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 CBC5EE2A51E for ; Sat, 7 Oct 2017 02:46:31 +0000 (UTC) (envelope-from fbsd@www.zefox.net) Received: from www.zefox.net (www.zefox.net [69.239.235.194]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client CN "www.zefox.org", Issuer "www.zefox.org" (not verified)) by mx1.freebsd.org (Postfix) with ESMTPS id 889E97E410 for ; Sat, 7 Oct 2017 02:46:31 +0000 (UTC) (envelope-from fbsd@www.zefox.net) Received: from www.zefox.net (localhost [127.0.0.1]) by www.zefox.net (8.15.2/8.15.2) with ESMTPS id v972kcUS041801 (version=TLSv1.2 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=NO); Fri, 6 Oct 2017 19:46:39 -0700 (PDT) (envelope-from fbsd@www.zefox.net) Received: (from fbsd@localhost) by www.zefox.net (8.15.2/8.15.2/Submit) id v972kchw041800; Fri, 6 Oct 2017 19:46:38 -0700 (PDT) (envelope-from fbsd) Date: Fri, 6 Oct 2017 19:46:38 -0700 From: bob prohaska To: Svatopluk Kraus Cc: "freebsd-arm@freebsd.org" , bob prohaska Subject: Re: pmap fault during buildworld on rpi2 Message-ID: <20171007024638.GA41063@www.zefox.net> References: <20171006155854.GA40189@www.zefox.net> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.24 (2015-08-30) X-BeenThere: freebsd-arm@freebsd.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: "Porting FreeBSD to ARM processors." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 07 Oct 2017 02:46:31 -0000 On Sat, Oct 07, 2017 at 01:13:19AM +0200, Svatopluk Kraus wrote: > I have already suggested the following: > https://lists.freebsd.org/pipermail/freebsd-arm/2017-September/016697.html > I read your message and didn't understand it well enough to follow the advice. > Nevertheless, I'm not sure that I understand the way how it happens. > Does it crash on rebooting or during buildworld? During buildworld. > Are you saying that > all kernels after r322520 crash during buildworld with pmap panic? > Correct, to a good approximation. The approximation is that on one occasion, very shortly after r322520, a kernel managed to complete a buildworld without a panic. That makes one success out of about five tries. Mark Millard reported what seemed like a similar panic about a year ago, but it went away by itself. When the successful build following r322520 happened I expected the same thing to happen. It didn't. bob prohaska > > On Fri, Oct 6, 2017 at 5:58 PM, bob prohaska wrote: > > For about one month now, buildworld has been crashing with > > a pmap error. Rebooting an older kernel always seems to solve > > the problem, but on rebooting the newly-compiled system the > > pmap fault happens again on the next buildworld. > > > > There seems to be no such problem during other compilations. > > > > A top window freezes with cc and ld as the dominant processes. > > > > The last kernel I have which works is r322520. > > > > Since nobody else seems to be reporting this behavior > > it's tempting to think the problem is local. Can anyone > > suggest where I might look? Console, top and log are at: > > http://www.zefox.net/~fbsd/rpi2/crashes/crash_10_6_17/ > > > > Thanks for reading, > > > > bob prohaska > > > > _______________________________________________ > > freebsd-arm@freebsd.org mailing list > > https://lists.freebsd.org/mailman/listinfo/freebsd-arm > > To unsubscribe, send any mail to "freebsd-arm-unsubscribe@freebsd.org"