From owner-freebsd-current@FreeBSD.ORG Mon Sep 29 01:35:57 2014 Return-Path: Delivered-To: freebsd-current@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [8.8.178.115]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTPS id 98A7CC62 for ; Mon, 29 Sep 2014 01:35:57 +0000 (UTC) Received: from mail-pa0-x22d.google.com (mail-pa0-x22d.google.com [IPv6:2607:f8b0:400e:c03::22d]) (using TLSv1 with cipher ECDHE-RSA-RC4-SHA (128/128 bits)) (Client CN "smtp.gmail.com", Issuer "Google Internet Authority G2" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 6C46227C for ; Mon, 29 Sep 2014 01:35:57 +0000 (UTC) Received: by mail-pa0-f45.google.com with SMTP id rd3so6972794pab.4 for ; Sun, 28 Sep 2014 18:35:57 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=references:mime-version:in-reply-to:content-type :content-transfer-encoding:message-id:cc:from:subject:date:to; bh=gj3qL5/qiPz3wZpojvzDwH2S7HSji9pZ8bdOsObF8pg=; b=cPdfyCte1o1CByB5gjd8imBzy7j7XzjV7UeESYW7KRPGX7bUbpKM12D0mNYrbApYm+ okFtHVuvRYF6tC8hbA49xwlJzYvjACU2jVflA9FLlpInBC5CUmvH0JH9dtmEXP08ZrKW +pADV+ktPQcoAP+3dNcIRpLXmwDUFFjpYStsx5NNn2FxNMkbamy79eYfheodTSZtzqYv ZRn+JQV0Ju93oNKm06TGldTKli9EZlxNftT+InlZ1Q2kys00vvFWayRP46Db6PB1BxlL D/4LVaH8qTOgyyyOHepqWGEZGmnYF8NAXQIBOHpyl/aGe7R3bGS7cB6axaroUhQI3Ii/ fQYQ== X-Received: by 10.67.5.40 with SMTP id cj8mr54691210pad.137.1411954557063; Sun, 28 Sep 2014 18:35:57 -0700 (PDT) Received: from [10.69.49.218] (mobile-166-137-213-165.mycingular.net. [166.137.213.165]) by mx.google.com with ESMTPSA id uf6sm10818861pac.16.2014.09.28.18.35.55 for (version=TLSv1 cipher=ECDHE-RSA-RC4-SHA bits=128/128); Sun, 28 Sep 2014 18:35:56 -0700 (PDT) References: <20140928071641.M7664@beckpeccoz.com> <20140929003358.M78145@aoek.com> Mime-Version: 1.0 (1.0) In-Reply-To: <20140929003358.M78145@aoek.com> Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Message-Id: X-Mailer: iPhone Mail (11D257) From: Garrett Cooper Subject: Re: What do you use for kernel debugging? Date: Sun, 28 Sep 2014 18:35:51 -0700 To: =?utf-8?Q?Jos=C3=A9_P=C3=A9rez_Arauzo?= Cc: FreeBSD Current , Benjamin Kaduk X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.18-1 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: Mon, 29 Sep 2014 01:35:57 -0000 > On Sep 28, 2014, at 17:51, "Jos=C3=A9 P=C3=A9rez Arauzo" 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!=