linux-kernel - [tip:x86/mm2] x86, kdump: Remove crashkernel range find limit for 64bit

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Message-ID: <tip-7d41a8a4a2b2438621a9159477bff36a11d79a42@git.kernel.org>
Date:	Tue, 29 Jan 2013 19:51:40 -0800
From:	tip-bot for Yinghai Lu <yinghai@...nel.org>
To:	linux-tip-commits@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org, hpa@...or.com, mingo@...nel.org,
	yinghai@...nel.org, tglx@...utronix.de, hpa@...ux.intel.com
Subject: [tip:x86/mm2] x86, kdump:
  Remove crashkernel range find limit for 64bit

Commit-ID:  7d41a8a4a2b2438621a9159477bff36a11d79a42
Gitweb:     http://git.kernel.org/tip/7d41a8a4a2b2438621a9159477bff36a11d79a42
Author:     Yinghai Lu <yinghai@...nel.org>
AuthorDate: Thu, 24 Jan 2013 12:20:10 -0800
Committer:  H. Peter Anvin <hpa@...ux.intel.com>
CommitDate: Tue, 29 Jan 2013 19:32:58 -0800

x86, kdump: Remove crashkernel range find limit for 64bit

Now kexeced kernel/ramdisk could be above 4g, so remove 896 limit for
64bit.

Signed-off-by: Yinghai Lu <yinghai@...nel.org>
Link: http://lkml.kernel.org/r/1359058816-7615-30-git-send-email-yinghai@kernel.org
Signed-off-by: H. Peter Anvin <hpa@...ux.intel.com>
---
 arch/x86/kernel/setup.c | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/arch/x86/kernel/setup.c b/arch/x86/kernel/setup.c
index bbe8cdf..4778dde 100644
--- a/arch/x86/kernel/setup.c
+++ b/arch/x86/kernel/setup.c
@@ -501,13 +501,11 @@ static void __init memblock_x86_reserve_range_setup_data(void)
 /*
  * Keep the crash kernel below this limit.  On 32 bits earlier kernels
  * would limit the kernel to the low 512 MiB due to mapping restrictions.
- * On 64 bits, kexec-tools currently limits us to 896 MiB; increase this
- * limit once kexec-tools are fixed.
  */
 #ifdef CONFIG_X86_32
 # define CRASH_KERNEL_ADDR_MAX	(512 << 20)
 #else
-# define CRASH_KERNEL_ADDR_MAX	(896 << 20)
+# define CRASH_KERNEL_ADDR_MAX	MAXMEM
 #endif
 
 static void __init reserve_crashkernel(void)
--
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