lkml.org 
[lkml]   [2008]   [Jun]   [22]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
Date
From
Subject[PATCH -tip-rcu] Make rcutorture more vicious: make quiescent rcutorture less power-hungry
This patch makes the non-module rcutorture a bit more friendly to
the power-conservation code. This is a rather simple-minded approach.
More sophisticated approaches would get rid of the rcutorture tasks
while rcutorture execution was suppressed, but attempts thus far to
do this have not gone well -- calling rcu_torture_init() from a /proc
callout results in oopses.

Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
---

rcutorture.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)

diff -urpNa -X dontdiff linux-2.6.26-rc4-rcut2-proc/kernel/rcutorture.c linux-2.6.26-rc4-rcut3-procq/kernel/rcutorture.c
--- linux-2.6.26-rc4-rcut2-proc/kernel/rcutorture.c 2008-06-22 10:29:04.000000000 -0700
+++ linux-2.6.26-rc4-rcut3-procq/kernel/rcutorture.c 2008-06-22 12:20:10.000000000 -0700
@@ -196,7 +196,10 @@ static void
rcu_stutter_wait(void)
{
while (stutter_pause_test || !rcutorture_runnable)
- schedule_timeout_interruptible(1);
+ if (rcutorture_runnable)
+ schedule_timeout_interruptible(1);
+ else
+ schedule_timeout_interruptible(HZ);
}

/*

\
 
 \ /
  Last update: 2008-06-22 22:09    [W:0.188 / U:0.220 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site