linux-kernel - Re: kernel git bisect question

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Message-ID: <20110310215438.GE12521@home.goodmis.org>
Date:	Thu, 10 Mar 2011 16:54:38 -0500
From:	Steven Rostedt <rostedt@...dmis.org>
To:	Mark Hounschell <markh@...pro.net>
Cc:	Linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: kernel git bisect question

On Thu, Mar 10, 2011 at 03:27:00PM -0500, Mark Hounschell wrote:
> Between git bisect [good | bad ]s should I always "make clean" or can I
> count on the build system to take care of everything properly?

I don't usually do a make clean. Although my ktest.pl (see tools/testing/ktest)
does do a make mrproper between builds (unless you specify not to).

There are some cases in the kernel that can cause bugs if you do not do
a make clean, so if your bisect hits one of those rare cases, you may
introduce a bug in the build. But that is extremely rare. Like I said, when I use to
do manual git bisects, I never did a make clean. But now that I do
automate bisects, and do not need to babysit the box, I let ktest do
those cleans.

-- Steve

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