linux-omap git: update to 2.6.29rc2

1 files changed, 0 insertions, 81 deletions

diff --git a/packages/linux/linux-omap/tick-schedc-suppress-needless-timer-reprogramming.patch b/packages/linux/linux-omap/tick-schedc-suppress-needless-timer-reprogramming.patch
deleted file mode 100644
index c5cf4ef6ef..0000000000
--- a/packages/linux/linux-omap/tick-schedc-suppress-needless-timer-reprogramming.patch
+++ /dev/null
@@ -1,81 +0,0 @@
-From: "Woodruff, Richard" <r-woodruff2@ti.com>
-
-In my device I get many interrupts from a high speed USB device in a very
-short period of time.  The system spends a lot of time reprogramming the
-hardware timer which is in a slower timing domain as compared to the CPU. 
-This results in the CPU spending a huge amount of time waiting for the
-timer posting to be done.  All of this reprogramming is useless as the
-wake up time has not changed.
-
-As measured using ETM trace this drops my reprogramming penalty from
-almost 60% CPU load down to 15% during high interrupt rate.  I can send
-traces to show this.
-
-
-Suppress setting of duplicate timer event when timer already stopped. 
-Timer programming can be very costly and can result in long cpu stall/wait
-times.
-
-[akpm@linux-foundation.org: coding-style fixes]
-Signed-off-by: Richard Woodruff <r-woodruff2@ti.com>
-Cc: Thomas Gleixner <tglx@linutronix.de>
-
-On Wed, 24 Sep 2008 18:31:29 +0200 (CEST) Thomas Gleixner <tglx@linutronix.de> wrote:
-
-> No, we only fall trrough into raise_softirq() when the reprogram code
-> detects that the event already expired. So you change the flow :)
->
-> It does also not deal with delta_jiffies >= NEXT_TIMER_MAX_DELTA :(
->
-> I have a closer look on that.
-
-Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
----
-
- kernel/time/tick-sched.c |   19 +++++++++++++------
- 1 file changed, 13 insertions(+), 6 deletions(-)
-
-diff -puN kernel/time/tick-sched.c~tick-schedc-suppress-needless-timer-reprogramming kernel/time/tick-sched.c
---- a/kernel/time/tick-sched.c~tick-schedc-suppress-needless-timer-reprogramming
-+++ a/kernel/time/tick-sched.c
-@@ -282,6 +282,17 @@ void tick_nohz_stop_sched_tick(int inidl
- 	/* Schedule the tick, if we are at least one jiffie off */
- 	if ((long)delta_jiffies >= 1) {
- 
-+		/*
-+		* calculate the expiry time for the next timer wheel
-+		* timer
-+		*/
-+		expires = ktime_add_ns(last_update, tick_period.tv64 *
-+				   delta_jiffies);
-+
-+		/* Skip reprogram of event if its not changed */
-+		if (ts->tick_stopped && ktime_equal(expires, dev->next_event))
-+			goto out2;
-+
- 		if (delta_jiffies > 1)
- 			cpu_set(cpu, nohz_cpu_mask);
- 		/*
-@@ -332,12 +343,7 @@ void tick_nohz_stop_sched_tick(int inidl
- 			goto out;
- 		}
- 
--		/*
--		 * calculate the expiry time for the next timer wheel
--		 * timer
--		 */
--		expires = ktime_add_ns(last_update, tick_period.tv64 *
--				       delta_jiffies);
-+		/* Mark expiries */
- 		ts->idle_expires = expires;
- 
- 		if (ts->nohz_mode == NOHZ_MODE_HIGHRES) {
-@@ -356,6 +362,7 @@ void tick_nohz_stop_sched_tick(int inidl
- 		tick_do_update_jiffies64(ktime_get());
- 		cpu_clear(cpu, nohz_cpu_mask);
- 	}
-+out2:
- 	raise_softirq_irqoff(TIMER_SOFTIRQ);
- out:
- 	ts->next_jiffies = next_jiffies;
-_