Date: Sun, 28 Sep 2014 18:35:51 -0700 From: Garrett Cooper <yaneurabeya@gmail.com> To: =?utf-8?Q?Jos=C3=A9_P=C3=A9rez_Arauzo?= <fbl@aoek.com> Cc: FreeBSD Current <freebsd-current@freebsd.org>, Benjamin Kaduk <kaduk@MIT.EDU> Subject: Re: What do you use for kernel debugging? Message-ID: <B3589A0F-AF06-4F7D-80C9-F614CFA21370@gmail.com> In-Reply-To: <20140929003358.M78145@aoek.com> References: <20140928071641.M7664@beckpeccoz.com> <alpine.GSO.1.10.1409281553060.21571@multics.mit.edu> <20140929003358.M78145@aoek.com>
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> On Sep 28, 2014, at 17:51, "Jos=C3=A9 P=C3=A9rez Arauzo" <fbl@aoek.com> wr= ote: >=20 > Hi Benjamin, >=20 > On Sun, 28 Sep 2014 15:54:36 -0400 (EDT), Benjamin Kaduk wrote >> On Sun, 28 Sep 2014, Jos=C3=A9 P=C3=A9rez Arauzo wrote: >>=20 >>> Hello, >>> I am trying to track down a (deadlock?) issue in CURRENT via DDB. The > kernel does >>> not complete hw probes on my Acer V5. >>>=20 >>> I get stuck on apic_isr looping which leads nowhere. >>>=20 >>> So I thought maybe things improve if I debug from another machine. >>>=20 >>>=20 >>> What do you use for kernel debugging? According to the handbook kgdb ove= r > serial >>> is a good option, do you agree? I'm on a netbook with no ethernet and no= > option >>> for firewire: can I have a USB / nullmodem setup to work? >>=20 >> You cannot. >=20 > Oh, what a shame. Why not? Is it because you need hardware probe to > be over to use it? >=20 > Today I bought a shining USB to USB thingy made by Hama, and guess what? > It's not supported on FBDS, altought uplcom(4) reports support for > Hama USB to RS232 brother. The bootloader doesn't support USB debugging and I'm pretty sure the devices= don't support local/remote debugging :(.. I'll do some poking around. I'll t= alk to some SMEs and see if I can write up a TODO list for a wiki page. Cheers!=
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