linux-kernel - [RFC PATCH v2] xen/x86: Increase xen_e820_map to E820_X

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Date:   Tue, 29 Nov 2016 21:24:45 -0600
From:   Alex Thorlton <athorlton@....com>
To:     linux-kernel@...r.kernel.org
Cc:     Alex Thorlton <athorlton@....com>, Russ Anderson <rja@....com>,
        David Vrabel <david.vrabel@...rix.com>,
        Juergen Gross <jgross@...e.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>,
        "H. Peter Anvin" <hpa@...or.com>,
        Denys Vlasenko <dvlasenk@...hat.com>,
        Boris Ostrovsky <boris.ostrovsky@...cle.com>, x86@...nel.org,
        xen-devel@...ts.xenproject.org
Subject: [RFC PATCH v2] xen/x86: Increase xen_e820_map to E820_X_MAX possible entries

Here's the second round of my patches to fix up the problems that we're
seeing with the XENMEM_machine_memory_map hypercall.  These few simple
changes, to give xen_e820_map some extra space, get things working fine
on our large machine.

This version of the patchset adds a patch to remove the #ifdef
CONFIG_EFI conditional around the definition of E820_X_MAX, so that it's
always slightly larger than E820MAX.  I've also tweaked the code that
works on xen_e820_map to use ARRAY_SIZE(xen_e820_map) instead of using
E820_X_MAX directly, as suggested by Boris.

As always, I appreciate any input that others can give!

- Alex

Alex Thorlton (2):
  x86: Make E820_X_MAX unconditionally larger than E820MAX
  xen/x86: Increase xen_e820_map to E820_X_MAX possible entries

 arch/x86/include/asm/e820.h | 8 +++-----
 arch/x86/xen/setup.c        | 6 +++---
 2 files changed, 6 insertions(+), 8 deletions(-)

-- 
1.8.5.6