linux-kernel - Re: [PATCH 1/2] x86/efi: Map EFI memmap entries in-order at runtime

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Message-ID: <560B32DC.2080704@zytor.com>
Date:	Tue, 29 Sep 2015 17:54:52 -0700
From:	"H. Peter Anvin" <hpa@...or.com>
To:	Ingo Molnar <mingo@...nel.org>,
	Matthew Garrett <mjg59@...f.ucam.org>
Cc:	Andy Lutomirski <luto@...capital.net>,
	Denys Vlasenko <dvlasenk@...hat.com>,
	Leif Lindholm <leif.lindholm@...aro.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Borislav Petkov <bp@...en8.de>,
	stable <stable@...r.kernel.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Brian Gerst <brgerst@...il.com>,
	Dave Young <dyoung@...hat.com>,
	"linux-efi@...r.kernel.org" <linux-efi@...r.kernel.org>,
	Ard Biesheuvel <ard.biesheuvel@...aro.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Peter Jones <pjones@...hat.com>,
	Matt Fleming <matt@...eblueprint.co.uk>,
	Matt Fleming <matt.fleming@...el.com>,
	Borislav Petkov <bp@...e.de>, "Lee, Chun-Yi" <jlee@...e.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	James Bottomley <JBottomley@...n.com>
Subject: Re: [PATCH 1/2] x86/efi: Map EFI memmap entries in-order at runtime

On 09/27/2015 11:16 PM, Ingo Molnar wrote:
> 
> So the question is, what does Windows do?
> 
> PC firmware is a hostile environment for Linux, to be compatible the best we can 
> do is to mimic the environment that the firmware is tested under - i.e. try to use 
> the firmware in the way Windows uses it.
> 

Windows apparently went through the same exercise of breakage followed
by a fix.  It is unknown if Windows will preserve gaps since those are
not manifest on existing firmware.

	-hpa


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