linux-kernel - Re: [PATCH] x86/efi: Auto enable EFI memmap on SGI UV systems

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Date:	Fri, 17 Jun 2016 15:57:19 -0500
From:	Joseph Thelen <jthelen@....com>
To:	Matt Fleming <matt@...eblueprint.co.uk>
Cc:	linux-kernel@...r.kernel.org, Alex Thorlton <athorlton@....com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>,
	"H. Peter Anvin" <hpa@...or.com>, x86@...nel.org,
	linux-efi@...r.kernel.org, Linn Crosetto <linn@....com>,
	Peter Jones <pjones@...hat.com>,
	Matthew Garrett <mjg59@...f.ucam.org>,
	Joseph Thelen <jthelen@....com>
Subject: Re: [PATCH] x86/efi: Auto enable EFI memmap on SGI UV systems

On Tue, Jun 14, 2016 at 05:34:49PM -0500, Joseph Thelen wrote:
> We're still reasonably confident we'll need something like this. Although,
> after looking into the stuff you mention, it seems that it should perhaps
> be a bit more sophisticated than just checking if we're on a UV system.
> 
> We'll get back to you after digging into this a bit more and coming
> up with some more specific reasons for the change.
> 
> Thanks,
> 
> Joseph Thelen
>

After investigating a bit more, it seems that this is really only
an issue where people are using older bootloaders/managers and kernels, some
of which are still supported / used by big distros like redhat.

Given that this is, as you've pointed out, either a non-issue or easily
remedied without kernel changes now and in the future, we'll try
talking about it directly with any distro where it's still an issue.

Thanks,

Joseph Thelen