From 1292211058aaf872eeb2a0e2677d237916b4501f Mon Sep 17 00:00:00 2001 From: Frederic Weisbecker Date: Sat, 7 Feb 2009 22:16:12 +0100 Subject: tracing/power: move the power trace headers to a dedicated file Impact: cleanup Move the power tracer headers to trace/power.h to keep ftrace.h and power bits more easy to maintain as separated topics. Signed-off-by: Frederic Weisbecker Cc: Arjan van de Ven Signed-off-by: Ingo Molnar --- arch/x86/kernel/process.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'arch/x86/kernel/process.c') diff --git a/arch/x86/kernel/process.c b/arch/x86/kernel/process.c index e68bb9e30864..026819ffcb0c 100644 --- a/arch/x86/kernel/process.c +++ b/arch/x86/kernel/process.c @@ -8,7 +8,7 @@ #include #include #include -#include +#include #include #include -- cgit v1.2.3 From b5f9fd0f8a05c9bafb91a9a85b9110938d8e585b Mon Sep 17 00:00:00 2001 From: Jason Baron Date: Wed, 11 Feb 2009 13:57:25 -0500 Subject: tracing: convert c/p state power tracer to use tracepoints Convert the c/p state "power" tracer to use tracepoints. Avoids a function call when the tracer is disabled. Signed-off-by: Jason Baron Acked-by: Ingo Molnar Signed-off-by: Steven Rostedt --- arch/x86/kernel/process.c | 3 +++ 1 file changed, 3 insertions(+) (limited to 'arch/x86/kernel/process.c') diff --git a/arch/x86/kernel/process.c b/arch/x86/kernel/process.c index 026819ffcb0c..e0d0fd7ab514 100644 --- a/arch/x86/kernel/process.c +++ b/arch/x86/kernel/process.c @@ -19,6 +19,9 @@ EXPORT_SYMBOL(idle_nomwait); struct kmem_cache *task_xstate_cachep; +DEFINE_TRACE(power_start); +DEFINE_TRACE(power_end); + int arch_dup_task_struct(struct task_struct *dst, struct task_struct *src) { *dst = *src; -- cgit v1.2.3 From 250981e6e1ef04947eccaa55e8c25ddcaa47a02e Mon Sep 17 00:00:00 2001 From: Thomas Gleixner Date: Mon, 16 Mar 2009 13:07:21 +0100 Subject: x86: reduce preemption off section in exit thread Impact: latency improvement No need to keep preemption disabled over the kfree call. Signed-off-by: Thomas Gleixner --- arch/x86/kernel/process.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) (limited to 'arch/x86/kernel/process.c') diff --git a/arch/x86/kernel/process.c b/arch/x86/kernel/process.c index 6afa5232dbb7..156f87582c6c 100644 --- a/arch/x86/kernel/process.c +++ b/arch/x86/kernel/process.c @@ -65,11 +65,11 @@ void exit_thread(void) { struct task_struct *me = current; struct thread_struct *t = &me->thread; + unsigned long *bp = t->io_bitmap_ptr; - if (me->thread.io_bitmap_ptr) { + if (bp) { struct tss_struct *tss = &per_cpu(init_tss, get_cpu()); - kfree(t->io_bitmap_ptr); t->io_bitmap_ptr = NULL; clear_thread_flag(TIF_IO_BITMAP); /* @@ -78,6 +78,7 @@ void exit_thread(void) memset(tss->io_bitmap, 0xff, t->io_bitmap_max); t->io_bitmap_max = 0; put_cpu(); + kfree(bp); } ds_exit_thread(current); -- cgit v1.2.3