Date: Tue, 15 Oct 2013 10:00:03 -0600 From: Ian Lepore <ian@FreeBSD.org> To: Jia-Shiun Li <jiashiun@gmail.com> Cc: "arm@freebsd.org" <arm@FreeBSD.org> Subject: Re: Instability on Raspberry Pi Message-ID: <1381852803.42859.131.camel@revolution.hippie.lan> In-Reply-To: <CAHNYxxOAPAcytpfOQF=EJXFNbqxBpY2crS_YmLT4PGc=6EZFvw@mail.gmail.com> References: <525AF318.3000900@gmail.com> <20131013194040.GA21904@night.db.net> <CAHNYxxOBvmota4BYoH0Tr8au_LX3_QEx8nDdX8Eh4%2BEeuDq2Lw@mail.gmail.com> <CA%2BU3Mf5=Ejt94SzNDQJTM85%2BVb3dRw%2BcJ=CseLa9L-tTS7pTuw@mail.gmail.com> <1381843499.42859.103.camel@revolution.hippie.lan> <FF2CE7AB-A1E9-45D4-83B5-702E7EA68198@gmail.com> <1381844785.42859.120.camel@revolution.hippie.lan> <CAHNYxxOAPAcytpfOQF=EJXFNbqxBpY2crS_YmLT4PGc=6EZFvw@mail.gmail.com>
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On Tue, 2013-10-15 at 23:33 +0800, Jia-Shiun Li wrote: > On Tue, Oct 15, 2013 at 9:46 PM, Ian Lepore <ian@freebsd.org> wrote: > > > > It requires that you are using a serial console, and that you have > > > > options ALT_BREAK_TO_DEBUGGER > > > > in your kernel config. It looks like that's not in the stock RPI-B > > config. There's a different break sequence for using a keyboard and > > video console (and I don't even know what that is, it's not something I > > ever use). > > I suppose "sysctl debug.kdb.alt_break_to_debugger=1" should be enough > to enable it at runtime? Yes, I think it would. I didn't even know that existed, all the alt-break code used to be wrapped in #ifdef blocks, now the #ifdef just controls the default value of that sysctl. -- Ian
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