From mboxrd@z Thu Jan 1 00:00:00 1970 From: Andrew Lutomirski Subject: Re: AAARGH bisection is hard (Re: [2.6.39 regression] X locks up hard right after logging in) Date: Fri, 13 May 2011 09:38:18 -0400 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: Christian Couder X-From: linux-kernel-owner@vger.kernel.org Fri May 13 15:38:49 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 1QKsZr-0005GJ-8i for glk-linux-kernel-3@lo.gmane.org; Fri, 13 May 2011 15:38:47 +0200 Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933109Ab1EMNik convert rfc822-to-quoted-printable (ORCPT ); Fri, 13 May 2011 09:38:40 -0400 Received: from mail-px0-f173.google.com ([209.85.212.173]:42386 "EHLO mail-px0-f173.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S933082Ab1EMNii convert rfc822-to-8bit (ORCPT ); Fri, 13 May 2011 09:38:38 -0400 Received: by pxi16 with SMTP id 16so1678658pxi.4 for ; Fri, 13 May 2011 06:38:38 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:sender:in-reply-to:references:from :date:x-google-sender-auth:message-id:subject:to:cc:content-type :content-transfer-encoding; bh=Jgo60QWD81QXjHbRagVtlTnsnXZpPihopC8b3X+6Y/Y=; b=tX+4QRWt9CRCFh6iL7rnNfbXM9I3+TdLkURNdoNh9g59L6B7D0o26Ql84WxM1oMcbf JTNJ7bi5+FmrZnJCZf073cRpSQpvO4IDMsPw/+Q/yw5ELd4CspsJFes8Ru8pkZ4MaCIe Wf7gYRnApkz94h5mmU9V9W/F3O/FAIZgBeyvE= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:sender:in-reply-to:references:from:date :x-google-sender-auth:message-id:subject:to:cc:content-type :content-transfer-encoding; b=au0tGK3suA6GbaLza2V2Ku/nb4zR9V7AGG6X+H7P2Ds8J1I6oTJXCqrVhfAN8puUax kzax88xS1odGR1MgZBUQdzRLNxNk1ItoBGiGq0XA7t4QRv6KrRUfT5gKpsh4fKijrDQi DS+JViR8PnKK2gBsPAJy9B6amGoIk0txD0yAg= Received: by 10.68.48.168 with SMTP id m8mr2245201pbn.113.1305293918073; Fri, 13 May 2011 06:38:38 -0700 (PDT) Received: by 10.68.41.197 with HTTP; Fri, 13 May 2011 06:38:18 -0700 (PDT) In-Reply-To: X-Google-Sender-Auth: -tgTD_W66QvVrbTuV8la9oj1zAs Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Archived-At: On Fri, May 13, 2011 at 4:20 AM, Christian Couder wrote: > On Thu, May 12, 2011 at 7:15 PM, Andrew Lutomirski wro= te: >> >> OK, this sucks. =A0In the course of bisecting this, I've hit two oth= er >> 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 se= en >> 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 an= y >> way to get the bisection to follow Linus' tree? =A0I think that if >> bisect could be persuaded to consider only changes that are reached = by >> following only the *first* merge parent all the way from the bad >> revision to the good revision, then the bisection would build versio= ns >> that were at least good enough for Linus to pull and might have fewe= r >> 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 on= e > you were thinking about: > > http://thread.gmane.org/gmane.comp.version-control.git/165433/ No, it was this: http://stackoverflow.com/questions/5638211/how-do-you-get-git-bisect-to= -ignore-merged-branches --Andy > > ? > > Thanks, > Christian. >