From mboxrd@z Thu Jan 1 00:00:00 1970 From: Christian Couder Subject: Re: AAARGH bisection is hard (Re: [2.6.39 regression] X locks up hard right after logging in) Date: Fri, 13 May 2011 10:20:54 +0200 Message-ID: References: Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: QUOTED-PRINTABLE Cc: linux-kernel@vger.kernel.org, netdev@vger.kernel.org, git@vger.kernel.org, Linus Torvalds , Shuang He To: Andrew Lutomirski X-From: linux-kernel-owner@vger.kernel.org Fri May 13 10:21:10 2011 Return-path: Envelope-to: glk-linux-kernel-3@lo.gmane.org Received: from vger.kernel.org ([209.132.180.67]) by lo.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1QKncU-0004th-5D for glk-linux-kernel-3@lo.gmane.org; Fri, 13 May 2011 10:21:10 +0200 Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758044Ab1EMIVA convert rfc822-to-quoted-printable (ORCPT ); Fri, 13 May 2011 04:21:00 -0400 Received: from mail-gy0-f174.google.com ([209.85.160.174]:42923 "EHLO mail-gy0-f174.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757894Ab1EMIU5 convert rfc822-to-8bit (ORCPT ); Fri, 13 May 2011 04:20:57 -0400 Received: by gyd10 with SMTP id 10so805220gyd.19 for ; Fri, 13 May 2011 01:20:56 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:in-reply-to:references:date :message-id:subject:from:to:cc:content-type :content-transfer-encoding; bh=2FP9Vtqn53rQjhWbJuE3EF86vB1xumZI6zBhZ3901OE=; b=QipYSr2hrVKsh3dmAMDo2K37ZoArsVon2V1P6wlq8EORYV5VA9OI2PdU4vpMjyQg2o 6Ty4KQJylw2AUHSKFhO4lgawne6jPkOUjLYXs3cd3MujAy5hZ9wzfRF+6fgZ6mN11fa0 1keOPwCzTxToAgnyO/rhz9acgLHGRYw8UiUcY= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type:content-transfer-encoding; b=PCCDxU2Y5uua4fa+efNnNuvrwN9zqPSI2gLsb69lH3H28wcDW2iql//raZgB/Uoy0H Uw8kftTmA2FBLdTp2VNUxKOeFd5YVy9FFJJF3FKC/TtTuAXW9dzc50JOzC2uJHUhwipQ GoAs0GjO8UEyh00mBGnq5s9MupXbnJueiuXSo= Received: by 10.146.26.23 with SMTP id 23mr982264yaz.33.1305274854780; Fri, 13 May 2011 01:20:54 -0700 (PDT) Received: by 10.147.167.5 with HTTP; Fri, 13 May 2011 01:20:54 -0700 (PDT) In-Reply-To: Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Archived-At: On Thu, May 12, 2011 at 7:15 PM, Andrew Lutomirski wrote= : > > OK, this sucks. =A0In the course of bisecting this, I've hit two othe= r > apparently unrelated bugs that prevent my from testing large numbers > of kernels. =A0Do I have two questions: > > 1. Anyone have any ideas from looking at the log? > > It looks like most of what's left is network code, so cc netdev. > > 2. =A0The !&$#@ bisection is skipping all over the place. =A0I've see= n > 2.6.37 versions and all manner of -rc's out of order. =A0Linus, and > other people who like pontificating about git bisection: is there any > way to get the bisection to follow Linus' tree? =A0I think that if > bisect could be persuaded to consider only changes that are reached b= y > following only the *first* merge parent all the way from the bad > revision to the good revision, then the bisection would build version= s > that were at least good enough for Linus to pull and might have fewer > bisection-killing bugs. > > (This isn't a new idea [1], and git rev-list --bisect --first-parent > isn't so bad except that it doesn't bisect.) Did you forget to put the reference [1] in your email? Was it this one you were thinking about: http://thread.gmane.org/gmane.comp.version-control.git/165433/ ? Thanks, Christian.