From: Tony Lindgren <tony@atomide.com>
Date: Thu, 7 Dec 2006 22:01:23 +0000 (-0800)
Subject: ARM: OMAP: Avoid updating system time for sub-jiffy interrupts
X-Git-Tag: v2.6.21-omap1~32^2~78
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=e27ceb9a40b125445435b5f8c7d20ba688a677b5;p=pandora-kernel.git

ARM: OMAP: Avoid updating system time for sub-jiffy interrupts

Updating system time and reprogramming timer can cause latency
issues on busy systems with lots of interrupts with constant
updating of time and reprogramming the system timer.

If a non-timer dyntick interrupt happens within a jiffy from
the last interrupt, updating time and reprogramming the timer
is unnecessary as we will get a timer interrupt soon anyways.

Signed-off-by: Tony Lindgren <tony@atomide.com>
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