linux-kernel - [RFC 0/3] Mirrored memory support for boot time allocations

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Date:	Fri, 6 Feb 2015 13:54:24 -0800
From:	Tony Luck <tony.luck@...el.com>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	linux-kernel@...r.kernel.org, linux-mm@...r.kernel.org
Subject: [RFC 0/3] Mirrored memory support for boot time allocations

Platforms that support a mix of mirrored and regular memory are coming.

We'd like to use the mirrored memory for kernel code, data and dynamically
allocated data because our machine check recovery code cannot fix problems
there.  This series modifies the memblock allocator to comprehend mirrored
memory and use it for all boot time allocations.  Later I'll dig into page_alloc.c
to put the leftover mirrored memory into a zone to be used for kernel allocation
by slab/slob/slub and others.

You'll see why this is just RFC when you get to part 3.

Tony Luck (3):
  mm/memblock: Add extra "flag" to memblock to allow selection of memory
    based on attribute
  mm/memblock: Allocate boot time data structures from mirrored memory
  x86, mirror: x86 enabling - find mirrored memory ranges and tell
    memblock

 arch/s390/kernel/crash_dump.c |   4 +-
 arch/sparc/mm/init_64.c       |   4 +-
 arch/x86/kernel/check.c       |   2 +-
 arch/x86/kernel/e820.c        |   2 +-
 arch/x86/mm/init_32.c         |   2 +-
 arch/x86/mm/memtest.c         |   2 +-
 include/linux/memblock.h      |  43 ++++++++++------
 mm/cma.c                      |   4 +-
 mm/memblock.c                 | 113 ++++++++++++++++++++++++++++++++----------
 mm/nobootmem.c                |  12 ++++-
 10 files changed, 135 insertions(+), 53 deletions(-)

-- 
2.1.0

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