linux-kernel - [PATCH 3.10 121/129] arm64: Change kernel stack size to 16K

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Message-Id: <20140106223903.055447281@linuxfoundation.org>
Date:	Mon,  6 Jan 2014 14:39:10 -0800
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	linux-kernel@...r.kernel.org
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	stable@...r.kernel.org, Feng Kan <fkan@....com>,
	Kumar Sankaran <ksankaran@....com>,
	Catalin Marinas <catalin.marinas@....com>,
	Mark Brown <broonie@...nel.org>
Subject: [PATCH 3.10 121/129] arm64: Change kernel stack size to 16K

3.10-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Feng Kan <fkan@....com>

commit 845ad05ec31e0f3872a321e10dbeaf872022632c upstream.

Written by Catalin Marinas, tested by APM on storm platform. This is needed
because of the failures encountered when running SpecWeb benchmark test.

Signed-off-by: Feng Kan <fkan@....com>
Acked-by: Kumar Sankaran <ksankaran@....com>
Signed-off-by: Catalin Marinas <catalin.marinas@....com>
Cc: Mark Brown <broonie@...nel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 arch/arm64/include/asm/thread_info.h |    4 ++--
 arch/arm64/kernel/entry.S            |    2 +-
 2 files changed, 3 insertions(+), 3 deletions(-)

--- a/arch/arm64/include/asm/thread_info.h
+++ b/arch/arm64/include/asm/thread_info.h
@@ -24,10 +24,10 @@
 #include <linux/compiler.h>
 
 #ifndef CONFIG_ARM64_64K_PAGES
-#define THREAD_SIZE_ORDER	1
+#define THREAD_SIZE_ORDER	2
 #endif
 
-#define THREAD_SIZE		8192
+#define THREAD_SIZE		16384
 #define THREAD_START_SP		(THREAD_SIZE - 16)
 
 #ifndef __ASSEMBLY__
--- a/arch/arm64/kernel/entry.S
+++ b/arch/arm64/kernel/entry.S
@@ -121,7 +121,7 @@
 
 	.macro	get_thread_info, rd
 	mov	\rd, sp
-	and	\rd, \rd, #~((1 << 13) - 1)	// top of 8K stack
+	and	\rd, \rd, #~(THREAD_SIZE - 1)	// top of stack
 	.endm
 
 /*


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