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| author | Ingo Molnar <mingo@kernel.org> | 2015-07-17 12:28:12 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2015-07-18 03:42:51 +0200 |
| commit | 5aaeb5c01c5b6c0be7b7aadbf3ace9f3a4458c3d (patch) | |
| tree | 8cf45cdd6647d1067d94aaad64598a7728f15d6b /arch/Kconfig | |
| parent | 0c8c0f03e3a292e031596484275c14cf39c0ab7a (diff) | |
| download | lwn-5aaeb5c01c5b6c0be7b7aadbf3ace9f3a4458c3d.tar.gz lwn-5aaeb5c01c5b6c0be7b7aadbf3ace9f3a4458c3d.zip | |
x86/fpu, sched: Introduce CONFIG_ARCH_WANTS_DYNAMIC_TASK_STRUCT and use it on x86
Don't burden architectures without dynamic task_struct sizing
with the overhead of dynamic sizing.
Also optimize the x86 code a bit by caching task_struct_size.
Acked-and-Tested-by: Dave Hansen <dave.hansen@linux.intel.com>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Dave Hansen <dave@sr71.net>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/1437128892-9831-3-git-send-email-mingo@kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'arch/Kconfig')
| -rw-r--r-- | arch/Kconfig | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/arch/Kconfig b/arch/Kconfig index bec6666a3cc4..8a8ea7110de8 100644 --- a/arch/Kconfig +++ b/arch/Kconfig @@ -221,6 +221,10 @@ config ARCH_TASK_STRUCT_ALLOCATOR config ARCH_THREAD_INFO_ALLOCATOR bool +# Select if arch wants to size task_struct dynamically via arch_task_struct_size: +config ARCH_WANTS_DYNAMIC_TASK_STRUCT + bool + config HAVE_REGS_AND_STACK_ACCESS_API bool help |