Subject: + sched-remove-arch-specific-fpu_counter-from-task_struct.patch added to -mm tree
To: Vineet.Gupta1@xxxxxxxxxxxx,mingo@xxxxxxxxxx,paul.mundt@xxxxxxxxx,vgupta@xxxxxxxxxxxx
From: akpm@xxxxxxxxxxxxxxxxxxxx
Date: Thu, 10 Oct 2013 14:40:14 -0700
The patch titled
Subject: sched: remove ARCH specific fpu_counter from task_struct
has been added to the -mm tree. Its filename is
sched-remove-arch-specific-fpu_counter-from-task_struct.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/sched-remove-arch-specific-fpu_counter-from-task_struct.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/sched-remove-arch-specific-fpu_counter-from-task_struct.patch
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------------------------------------------------------
From: Vineet Gupta <Vineet.Gupta1@xxxxxxxxxxxx>
Subject: sched: remove ARCH specific fpu_counter from task_struct
fpu_counter in task_struct was used only by sh/x86. Both of these now
carry it in ARCH specific thread_struct, hence this can now be removed
from generic task_struct, shrinking it slightly for other arches.
Signed-off-by: Vineet Gupta <vgupta@xxxxxxxxxxxx>
Cc: Ingo Molnar <mingo@xxxxxxxxxx>
Cc: Paul Mundt <paul.mundt@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
include/linux/sched.h | 9 ---------
1 file changed, 9 deletions(-)
diff -puN include/linux/sched.h~sched-remove-arch-specific-fpu_counter-from-task_struct include/linux/sched.h
--- a/include/linux/sched.h~sched-remove-arch-specific-fpu_counter-from-task_struct
+++ a/include/linux/sched.h
@@ -1046,15 +1046,6 @@ struct task_struct {
struct hlist_head preempt_notifiers;
#endif
- /*
- * 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;
#ifdef CONFIG_BLK_DEV_IO_TRACE
unsigned int btrace_seq;
#endif
_
Patches currently in -mm which might be from Vineet.Gupta1@xxxxxxxxxxxx are
sh-move-fpu_counter-into-arch-specific-thread_struct.patch
x86-move-fpu_counter-into-arch-specific-thread_struct.patch
sched-remove-arch-specific-fpu_counter-from-task_struct.patch
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