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Message-Id: <1441376587-12979-4-git-send-email-jungseoklee85@gmail.com> Date: Fri, 4 Sep 2015 14:23:07 +0000 From: Jungseok Lee <jungseoklee85@...il.com> To: catalin.marinas@....com, will.deacon@....com, linux-arm-kernel@...ts.infradead.org Cc: linux-kernel@...r.kernel.org Subject: [RFC PATCH 3/3] arm64: Reduce kernel stack size when using IRQ stack It is a principal objective of IRQ stack feature to reduce kernel stack size. Therefore, the size is set to 8KB when a separate IRQ stack is active. Signed-off-by: Jungseok Lee <jungseoklee85@...il.com> --- arch/arm64/include/asm/thread_info.h | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/arch/arm64/include/asm/thread_info.h b/arch/arm64/include/asm/thread_info.h index 5345a67..e79210d 100644 --- a/arch/arm64/include/asm/thread_info.h +++ b/arch/arm64/include/asm/thread_info.h @@ -24,10 +24,18 @@ #include <linux/compiler.h> #ifndef CONFIG_ARM64_64K_PAGES +#ifdef CONFIG_IRQ_STACK +#define THREAD_SIZE_ORDER 1 +#else #define THREAD_SIZE_ORDER 2 #endif +#endif +#ifdef CONFIG_IRQ_STACK +#define THREAD_SIZE 8192 +#else #define THREAD_SIZE 16384 +#endif #define THREAD_START_SP (THREAD_SIZE - 16) #ifndef __ASSEMBLY__ -- 1.9.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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