From: Ingo Molnar Date: Wed, 22 Apr 2015 07:57:24 +0000 (+0200) Subject: x86/fpu: Improve the comment for the fpu::counter field X-Git-Url: http://drtracing.org/?a=commitdiff_plain;h=126009993faa7a750835e67f3ccb90cee124ffa7;p=deliverable%2Flinux.git x86/fpu: Improve the comment for the fpu::counter field This was pretty hard to read, improve it. Reviewed-by: Borislav Petkov Cc: Andy Lutomirski Cc: Dave Hansen Cc: Fenghua Yu Cc: H. Peter Anvin Cc: Linus Torvalds Cc: Oleg Nesterov Cc: Peter Zijlstra Cc: Thomas Gleixner Signed-off-by: Ingo Molnar --- diff --git a/arch/x86/include/asm/processor.h b/arch/x86/include/asm/processor.h index 64d6b5d97ce9..28df85561730 100644 --- a/arch/x86/include/asm/processor.h +++ b/arch/x86/include/asm/processor.h @@ -435,11 +435,11 @@ struct 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 + * during which the FPU stays used. If this is over a threshold, the + * lazy fpu saving logic becomes unlazy, to save the trap overhead. + * This is an unsigned char so that after 256 iterations the counter + * wraps and the context switch behavior turns lazy again; this is to + * deal with bursty apps that only use the FPU for a short time: */ unsigned char counter; };