linux-kernel - Re: [PATCH] i386: always clear bss

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Date:	Fri, 04 May 2007 20:11:02 -0600
From:	ebiederm@...ssion.com (Eric W. Biederman)
To:	"H. Peter Anvin" <hpa@...or.com>
Cc:	Jeremy Fitzhardinge <jeremy@...p.org>,
	Rusty Russell <rusty@...tcorp.com.au>, Andi Kleen <ak@...e.de>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] i386: always clear bss

"H. Peter Anvin" <hpa@...or.com> writes:

> Eric W. Biederman wrote:
>> 
>> I have this vague memory of liking 0x3c because if we do happen to use
>> more room then we intended the consequences are pretty benign.
>> 
>> But that is a pretty minor consequence.
>> 

I meant to say it is a pretty minor consideration.

> That's a dangerous assumption (besides, it's likely wrong, since there
> are only two unused bytes below it.)

Worse case on a modern machine is that we get a messed up screen.
The odds of it happening are sufficiently remote that it isn't worth
worrying about.

Eric
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