From owner-freebsd-bugs@freebsd.org Fri Jul 17 03:46:24 2015 Return-Path: Delivered-To: freebsd-bugs@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 E72819A239A for ; Fri, 17 Jul 2015 03:46:24 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from kenobi.freebsd.org (kenobi.freebsd.org [IPv6:2001:1900:2254:206a::16:76]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id AF97E1968 for ; Fri, 17 Jul 2015 03:46:24 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from bugs.freebsd.org ([127.0.1.118]) by kenobi.freebsd.org (8.15.2/8.15.2) with ESMTP id t6H3kOHd069269 for ; Fri, 17 Jul 2015 03:46:24 GMT (envelope-from bugzilla-noreply@freebsd.org) From: bugzilla-noreply@freebsd.org To: freebsd-bugs@FreeBSD.org Subject: [Bug 201642] panic: recent lockstat work resulting in boot time double fault on STABLE/HEAD Date: Fri, 17 Jul 2015 03:46:24 +0000 X-Bugzilla-Reason: AssignedTo X-Bugzilla-Type: new X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: Base System X-Bugzilla-Component: kern X-Bugzilla-Version: 10.2-BETA1 X-Bugzilla-Keywords: X-Bugzilla-Severity: Affects Only Me X-Bugzilla-Who: jason.unovitch@gmail.com X-Bugzilla-Status: New X-Bugzilla-Priority: --- X-Bugzilla-Assigned-To: freebsd-bugs@FreeBSD.org X-Bugzilla-Target-Milestone: --- X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: bug_id short_desc product version rep_platform op_sys bug_status bug_severity priority component assigned_to reporter Message-ID: Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 7bit X-Bugzilla-URL: https://bugs.freebsd.org/bugzilla/ Auto-Submitted: auto-generated MIME-Version: 1.0 X-BeenThere: freebsd-bugs@freebsd.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: Bug reports List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 17 Jul 2015 03:46:25 -0000 https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=201642 Bug ID: 201642 Summary: panic: recent lockstat work resulting in boot time double fault on STABLE/HEAD Product: Base System Version: 10.2-BETA1 Hardware: i386 OS: Any Status: New Severity: Affects Only Me Priority: --- Component: kern Assignee: freebsd-bugs@FreeBSD.org Reporter: jason.unovitch@gmail.com Ever since the recent lockstat improvements, my Soekris 6501 running i386 has been having a repeatable kernel panic at boot up. I normally running CURRENT, however after tracking the issue down I verified this is happening on 10.2-BETA1 as well as CURRENT. The panic I am seeing looks along the lines of this below and is repeatable on a revision with the lockstat work. The only way I have been able to boot on an impacted revision is by using safe boot via the boot loader menu. SMP: AP CPU #1 Launched! Timecounter "TSC" frequency 1600033960 Hz quality 1000 Fatal double fault: eip = 0xc1099873 esp = 0xe1fb8000 ebp = 0xe1fb8000 cpuid = 1; apic id = 01 panic: double fault cpuid = 1 KDB: stack backtrace: #0 0xc0b7a602 at kdb_backtrace+0x52 #1 0xc0b3b79b at vpanic+0x11b #2 0xc0b3b67b at panic+0x1b #3 0xc108736b at dblfault_handler+0xab Uptime: 11s Automatic reboot in 15 seconds - press a key on the console to abort Summary of tested revisions: stable/10 -- good -- r284994 stable/10 -- bad -- r284998, r285365 head -- good -- r284296, r284256, r284233, r284194 head -- bad -- r284297, r284309, r285143-r285155 (approx, this was when I initially ran into issue) The common ground has been the several lockstat improvement commit in r284297. https://svnweb.freebsd.org/base?view=revision&revision=284297 -- You are receiving this mail because: You are the assignee for the bug.