Date: Tue, 02 Mar 2010 08:11:36 -0800 From: Sean Bruno <seanbru@yahoo-inc.com> To: Kazumaro Aoki <ka@flu.if0.org> Cc: "freebsd-firewire@freebsd.org" <freebsd-firewire@freebsd.org> Subject: Re: reset with fwcontrol -R Message-ID: <1267546296.2264.0.camel@localhost.localdomain> In-Reply-To: <20100303.001031.193727057.ka@flu.if0.org> References: <20100112.001502.164372502.ka@flu.if0.org> <20100117.031442.112571713.ka@flu.if0.org> <20100207.220956.59557668.ka@flu.if0.org> <20100303.001031.193727057.ka@flu.if0.org>
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On Tue, 2010-03-02 at 07:10 -0800, Kazumaro Aoki wrote: > Hello, members of freebsd-firewire! > > From: Kazumaro Aoki <ka@flu.if0.org> > Subject: Re: reset with fwcontrol -R > Date: Sun, 07 Feb 2010 22:09:56 +0900 (JST) > > > In recent month, the system is in good condition, but today morning, > > system crashed and made a crash dump. > (snip) > > # kgdb /boot/kernel/kernel vmcore.1 > (snip) > > Fatal trap 12: page fault while in kernel mode > > current process = 42 (fw0_taskq) > > panic: page fault > (snip) > > (kgdb) bt > (snip) > > #7 0xc05f6d87 in fwohci_task_dma (arg=0xc5662000, pending=1) > > at /home/usr/src/sys/dev/firewire/fwohci.c:2206 > (snip) > > I met the similar panic twice, after I saw the above message. > First, the crash dump was unfortunately not made. > Second, the crash dump was made and kgdb said the same line > (FreeBSD7.2R) causes the panic. > > Now, I configured the kernel and I used the loadable module of > firewire. So, I can easy to modify the module and it enables to add > to show debug information other than "sysctl debug.firewire_debug=3". > > I noticed lines 2197-2199 are > #if 0 > dump_db(sc, dmach); > #endif > Are the information generated by the commented out the lines useful to > analyze the problem? > I've never used that code, but I think it is more debugging. If it is useful for debugging this issue, I can make it a sysctl for debugging. Sean
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