diff options
| author | Ingo Molnar <mingo@kernel.org> | 2015-04-22 09:52:56 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2015-05-19 15:47:14 +0200 |
| commit | c0c2803dee21bef08ef5aacdf96fe2f1759ccc62 (patch) | |
| tree | d3f75137f0589eb3214e23bcaab9d2919b31465b /arch/x86/include/asm/processor.h | |
| parent | 3f6a0bce90289e0980b4250ccb03b765860247ee (diff) | |
x86/fpu: Move thread_info::fpu_counter into thread_info::fpu.counter
This field is kept separate from the main FPU state structure for
no good reason.
Reviewed-by: Borislav Petkov <bp@alien8.de>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: Fenghua Yu <fenghua.yu@intel.com>
Cc: H. Peter Anvin <hpa@zytor.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>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'arch/x86/include/asm/processor.h')
| -rw-r--r-- | arch/x86/include/asm/processor.h | 18 |
1 files changed, 9 insertions, 9 deletions
diff --git a/arch/x86/include/asm/processor.h b/arch/x86/include/asm/processor.h index 2dc08c231a9a..64d6b5d97ce9 100644 --- a/arch/x86/include/asm/processor.h +++ b/arch/x86/include/asm/processor.h @@ -433,6 +433,15 @@ struct fpu { unsigned int last_cpu; unsigned int has_fpu; union thread_xstate *state; + /* + * This counter contains the number of consecutive context switches + * that the FPU is used. If this is over a threshold, the lazy fpu + * saving becomes unlazy to save the trap. This is an unsigned char + * so that after 256 times the counter wraps and the behavior turns + * lazy again; this to deal with bursty apps that only use FPU for + * a short time + */ + unsigned char counter; }; #ifdef CONFIG_X86_64 @@ -535,15 +544,6 @@ struct thread_struct { unsigned long iopl; /* Max allowed port in the bitmap, in bytes: */ unsigned io_bitmap_max; - /* - * fpu_counter contains the number of consecutive context switches - * that the FPU is used. If this is over a threshold, the lazy fpu - * saving becomes unlazy to save the trap. This is an unsigned char - * so that after 256 times the counter wraps and the behavior turns - * lazy again; this to deal with bursty apps that only use FPU for - * a short time - */ - unsigned char fpu_counter; }; /* |