linux-kernel - [RFC PATCH 5/5] crash dump bitmap: workaround for kernel 3.9-rc1 kdump issue

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Message-ID: <20130307140643.28557.26849.stgit@k.asiapacific.hpqcorp.net>
Date:	Thu, 07 Mar 2013 22:06:45 +0800
From:	Jingbai Ma <jingbai.ma@...com>
To:	linux-kernel@...r.kernel.org
Subject: [RFC PATCH 5/5] crash dump bitmap: workaround for kernel 3.9-rc1
 kdump issue

Linux kernel 3.9-rc1 allows crashkernel above 4GB, but current
kexec-tools doesn't support it yet.
This patch is only a workaround to make kdump work again.
This patch should be removed after kexec-tools 2.0.4 release.

Signed-off-by: Jingbai Ma <jingbai.ma@...com>
---
 arch/x86/kernel/setup.c |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)

diff --git a/arch/x86/kernel/setup.c b/arch/x86/kernel/setup.c
index 165c831..15321d6 100644
--- a/arch/x86/kernel/setup.c
+++ b/arch/x86/kernel/setup.c
@@ -506,7 +506,8 @@ static void __init memblock_x86_reserve_range_setup_data(void)
 #ifdef CONFIG_X86_32
 # define CRASH_KERNEL_ADDR_MAX	(512 << 20)
 #else
-# define CRASH_KERNEL_ADDR_MAX	MAXMEM
+/* # define CRASH_KERNEL_ADDR_MAX	MAXMEM */
+# define CRASH_KERNEL_ADDR_MAX	(896 << 20)
 #endif
 
 static void __init reserve_crashkernel_low(void)

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