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Groups > linux.kernel > #1219093
| From | Jungseok Lee <jungseoklee85@gmail.com> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | [RFC PATCH 3/3] arm64: Reduce kernel stack size when using IRQ stack |
| Date | 2015-09-04 16:30 +0200 |
| Message-ID | <q50a7-4GT-23@gated-at.bofh.it> (permalink) |
| References | <q50a6-4GT-5@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
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@gmail.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@vger.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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[RFC PATCH 0/3] Implement IRQ stack on ARM64 Jungseok Lee <jungseoklee85@gmail.com> - 2015-09-04 16:30 +0200 [RFC PATCH 3/3] arm64: Reduce kernel stack size when using IRQ stack Jungseok Lee <jungseoklee85@gmail.com> - 2015-09-04 16:30 +0200
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