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Re: [PATCH RFC] x86: check for and defend against BIOS memory corruption

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From: Alan Cox
Subject: Re: [PATCH RFC] x86: check for and defend against BIOS memory corruption
Date: Friday, August 29, 2008 - 2:25 am

> >>  - Clears the reserved memory so we can observe changes to it.

You ought to pick different values on different runs 0x00, 0xFF, 0xAA,
0x55 etc...


So a zillion people should lose a chunk of RAM because of what is
probably an obscure bug in a single version of a piece of SMM code on two
systems total ?

That appears to be totally out of proportion - plus the defaults are
*irrelevant* for mass user coverage. If you want large scale coverage ask
the Fedora, OpenSuSE and Ubuntu people to turn it on for a testing kernel
release and report back.

Alan
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Messages in current thread:
[PATCH RFC] x86: check for and defend against BIOS memory ..., Jeremy Fitzhardinge, (Thu Aug 28, 12:52 pm)
Re: [PATCH RFC] x86: check for and defend against BIOS mem ..., Yinghai Lu, (Thu Aug 28, 6:49 pm)
Re: [PATCH RFC] x86: check for and defend against BIOS mem ..., Jeremy Fitzhardinge, (Thu Aug 28, 8:28 pm)
Re: [PATCH RFC] x86: check for and defend against BIOS mem ..., Rafał Miłecki, (Thu Aug 28, 11:20 pm)
Re: [PATCH RFC] x86: check for and defend against BIOS mem ..., Ingo Molnar, (Thu Aug 28, 11:45 pm)
Re: [PATCH RFC] x86: check for and defend against BIOS mem ..., Jeremy Fitzhardinge, (Fri Aug 29, 12:21 am)
Re: [PATCH RFC] x86: check for and defend against BIOS mem ..., Jeremy Fitzhardinge, (Fri Aug 29, 12:22 am)
Re: [PATCH RFC] x86: check for and defend against BIOS mem ..., Ingo Molnar, (Fri Aug 29, 12:30 am)
Re: [PATCH RFC] x86: check for and defend against BIOS mem ..., Jeremy Fitzhardinge, (Fri Aug 29, 1:02 am)
Re: [PATCH RFC] x86: check for and defend against BIOS mem ..., Hugh Dickins, (Fri Aug 29, 1:14 am)
Re: [PATCH RFC] x86: check for and defend against BIOS mem ..., Alan Cox, (Fri Aug 29, 2:25 am)
Re: [PATCH RFC] x86: check for and defend against BIOS mem ..., Alan Cox, (Fri Aug 29, 3:06 am)
Re: [PATCH RFC] x86: check for and defend against BIOS mem ..., Rafał Miłecki, (Fri Aug 29, 3:13 am)
Re: [PATCH RFC] x86: check for and defend against BIOS mem ..., Hugh Dickins, (Fri Aug 29, 3:24 am)
Re: [PATCH RFC] x86: check for and defend against BIOS mem ..., Rafał Miłecki, (Fri Aug 29, 4:54 am)
Re: [PATCH RFC] x86: check for and defend against BIOS mem ..., Alan Jenkins, (Fri Aug 29, 5:09 am)
Re: [PATCH RFC] x86: check for and defend against BIOS mem ..., Hugh Dickins, (Fri Aug 29, 6:21 am)
Re: [PATCH RFC] x86: check for and defend against BIOS mem ..., Jeremy Fitzhardinge, (Fri Aug 29, 7:08 am)
Re: [PATCH RFC] x86: check for and defend against BIOS mem ..., Jeremy Fitzhardinge, (Fri Aug 29, 7:18 am)
Re: [PATCH RFC] x86: check for and defend against BIOS mem ..., Jeremy Fitzhardinge, (Fri Aug 29, 7:48 am)
Re: [PATCH RFC] x86: check for and defend against BIOS mem ..., Rafał Miłecki, (Fri Aug 29, 9:30 am)
Re: [PATCH RFC] x86: check for and defend against BIOS mem ..., H. Peter Anvin, (Fri Aug 29, 10:02 am)
Re: [PATCH RFC] x86: check for and defend against BIOS mem ..., H. Peter Anvin, (Fri Aug 29, 10:03 am)
Re: [PATCH RFC] x86: check for and defend against BIOS mem ..., H. Peter Anvin, (Fri Aug 29, 10:20 am)
Re: [PATCH RFC] x86: check for and defend against BIOS mem ..., Rafał Miłecki, (Fri Aug 29, 10:39 am)
Re: [PATCH RFC] x86: check for and defend against BIOS mem ..., Kasper Sandberg, (Fri Aug 29, 1:31 pm)
Re: [PATCH RFC] x86: check for and defend against BIOS mem ..., Jeremy Fitzhardinge, (Fri Aug 29, 6:15 pm)
Re: [PATCH RFC] x86: check for and defend against BIOS mem ..., Rafał Miłecki, (Thu Sep 4, 12:42 pm)
Re: [PATCH RFC] x86: check for and defend against BIOS mem ..., Hugh Dickins, (Thu Sep 4, 1:23 pm)
Re: [PATCH RFC] x86: check for and defend against BIOS mem ..., Jeremy Fitzhardinge, (Thu Sep 4, 4:04 pm)
Re: [PATCH RFC] x86: check for and defend against BIOS mem ..., Ingo Molnar, (Sat Sep 6, 11:09 am)
Re: [PATCH RFC] x86: check for and defend against BIOS mem ..., Hugh Dickins, (Mon Sep 8, 4:35 am)
Re: [PATCH RFC] x86: check for and defend against BIOS mem ..., Jeremy Fitzhardinge, (Mon Sep 8, 10:16 am)
Re: [PATCH RFC] x86: check for and defend against BIOS mem ..., Hugh Dickins, (Mon Sep 8, 12:14 pm)
Re: [PATCH RFC] x86: check for and defend against BIOS mem ..., Jeremy Fitzhardinge, (Mon Sep 8, 12:45 pm)