Date: Wed, 30 Jul 2014 11:55:59 -0600 From: Ian Lepore <ian@FreeBSD.org> To: Shawn Webb <lattera@gmail.com> Cc: freebsd-arm@freebsd.org Subject: Re: Kernel Panic on BeagleBone Black Message-ID: <1406742959.56408.220.camel@revolution.hippie.lan> In-Reply-To: <20140730174332.GJ1869@pwnie.vrt.sourcefire.com> References: <20140730121922.GI1869@pwnie.vrt.sourcefire.com> <1406741430.56408.218.camel@revolution.hippie.lan> <20140730174332.GJ1869@pwnie.vrt.sourcefire.com>
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On Wed, 2014-07-30 at 13:43 -0400, Shawn Webb wrote: > On Jul 30, 2014 11:30 AM -0600, Ian Lepore wrote: > > On Wed, 2014-07-30 at 08:19 -0400, Shawn Webb wrote: > > > Hey All, > > > > > > I've just updated to a recent HEAD (r269240). I get a kernel panic > > > almost immediately on boot. Below is the log. > > > > > > ==== Start of dump ==== > > > cpsw0: <3-port Switch Ethernet Subsystem> mem 0x4a100000-0x4a103fff irq 40,41,42,43 on simplebus0 > > > cpsw0: CPSW SS Version 1.12 (0) > > > cpsw0: Initial queue size TX=128 RX=384 > > > cpsw0: Ethernet address: 1c:ba:8c:e4:6d:6a > > > cpsw0: Failed to read from PHY. > > > cpsw0: attaching PHYs failed > > > > > > vm_fault(0xc070b9e0, 0, 1, 0) -> 1 > > > Fatal kernel mode data abort: 'Translation Fault (S)' > > > trapframe: 0xc080eb28 > > > FSR=00000005, FAR=00000018, spsr=80000193 > > > r0 =c266f280, r1 =00000000, r2 =00000019, r3 =60000193 > > > r4 =00000000, r5 =c266f280, r6 =00000006, r7 =c05c99b4 > > > r8 =c266f280, r9 =c26ca28c, r10=c26c80c8, r11=c080eb88 > > > r12=00000000, ssp=c080eb78, slr=c05ee1cc, pc =c03d2614 > > > > > > [ thread pid 0 tid 100000 ] > > > Stopped at device_delete_child+0x14: ldr r1, [r4, #0x018] > > > db> bt > > > Tracing pid 0 tid 100000 td 0xc070b6d0 > > [...] > > > Unable to unwind further > > > ==== End of dump ==== > > > > > > If there's anything I can do, let me know. > > > > > > Thanks, > > > > > > Shawn > > > > Hmm, I can't reproduce this on my BB White at r269302. The real error > > is "Failed to read from PHY". The kernel abort was just accidental > > fallout from trying to clean up and detach the ethernet driver since it > > failed to init properly (error paths never get tested enough). > > > > What was the prior release you were on that worked okay? > > > > Since I just made a series of changes to armv6 busdma I'm tempted to > > suspect them, even though there shouldn't be any DMA involved in talking > > to the PHY. Still, it would be interesting to know if backing off to > > r269134 makes the problem go away. > > > > -- Ian > > > > > > The release prior worked okay. I did get occasional kernel panics > (though, I didn't have time to do a backtrace and post here about it). > I'm unsure what svn rev the prior build was at. I can try reverting that > revision you mentioned tonight and report back if you'd like. > > Thanks, > > Shawn Don't revert that single revision I mentioned, revert the whole source tree to that rev (or to speed things up, really just the sys tree, and rebuild just the kernel). -- Ian
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