From owner-freebsd-current@FreeBSD.ORG Sat Jul 19 15:57:26 2008 Return-Path: Delivered-To: freebsd-current@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id D814C106564A for ; Sat, 19 Jul 2008 15:57:26 +0000 (UTC) (envelope-from smallhand@crawblog.com) Received: from rv-out-0506.google.com (rv-out-0506.google.com [209.85.198.230]) by mx1.freebsd.org (Postfix) with ESMTP id A5CA78FC0C for ; Sat, 19 Jul 2008 15:57:26 +0000 (UTC) (envelope-from smallhand@crawblog.com) Received: by rv-out-0506.google.com with SMTP id b25so871440rvf.43 for ; Sat, 19 Jul 2008 08:57:26 -0700 (PDT) Received: by 10.141.141.3 with SMTP id t3mr790493rvn.124.1216483046489; Sat, 19 Jul 2008 08:57:26 -0700 (PDT) Received: by 10.141.97.9 with HTTP; Sat, 19 Jul 2008 08:57:26 -0700 (PDT) Message-ID: <919383240807190857x6352a004x37943642399242fa@mail.gmail.com> Date: Sat, 19 Jul 2008 10:57:26 -0500 From: "Edward Ruggeri" To: "Garrett Cooper" In-Reply-To: <919383240807181729n210402a5r5095f8b1554e9891@mail.gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Content-Disposition: inline References: <919383240807172100j35e1c796q513fa34d83f8e8e0@mail.gmail.com> <7d6fde3d0807180336h61f13a73pcc433be16a732c7e@mail.gmail.com> <919383240807181729n210402a5r5095f8b1554e9891@mail.gmail.com> Cc: freebsd-current@freebsd.org Subject: Re: 7.0 CURRENT kernel's ath driver causes page fault, kernel panic (debugging kernel) X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Discussions about the use of FreeBSD-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 19 Jul 2008 15:57:26 -0000 On Fri, Jul 18, 2008 at 7:29 PM, Edward Ruggeri wrote: >> As for the actual debug process, there's a spot in the dev handbook >> about it (http://www.freebsd.org/doc/en/books/developers-handbook/kerneldebug.html), >> but when I tried debugging my issue with NTFS and SMB I didn't really >> find it helpful to be honest... AND >> You may also have to compile without SMP and with the 4BSD scheduler >> just to see whether or not it's an issue reproducible with the ULE >> scheduler, the driver, or something else... I have a couple dumps now, with different kernel configurations. In addition to the debugging options Garrett has recommended, I've switched from the ULE to the 4BSD scheduler and removed SMP support. The error persists. The backtrace in kgdb says that panic is called from the function ath_start at line 1748 in ath_start.c. Here is a snippet: bf = STAILQ_FIRST(&frags); KASSERT(bf != NULL, ("no buf for txfrag")); Does that sound like enough to file a problem report with? What other information would be desired? -- Ned Ruggeri