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- From bf137324a7f873dc90b9965398de259f5d992f9b Mon Sep 17 00:00:00 2001
- From: Phil Elwell <phil@raspberrypi.org>
- Date: Wed, 30 Mar 2016 17:23:15 +0100
- Subject: [PATCH 218/381] cpufreq: Temporarily ignore io_is_busy=1
- To speed testing of the new sdhost driver that adapts to changes in
- core_freq, hack the on-demand governor to treat io_is_busy=1 as
- io_is_busy=0. The io_is_busy feature can still be forced using
- io_is_busy=2.
- Signed-off-by: Phil Elwell <phil@raspberrypi.org>
- ---
- drivers/cpufreq/cpufreq_ondemand.c | 7 ++++++-
- 1 file changed, 6 insertions(+), 1 deletion(-)
- --- a/drivers/cpufreq/cpufreq_ondemand.c
- +++ b/drivers/cpufreq/cpufreq_ondemand.c
- @@ -307,7 +307,12 @@ static ssize_t store_io_is_busy(struct d
- ret = sscanf(buf, "%u", &input);
- if (ret != 1)
- return -EINVAL;
- - od_tuners->io_is_busy = !!input;
- + // XXX temporary hack
- + if (input > 1)
- + input = 1;
- + else
- + input = 0;
- + od_tuners->io_is_busy = input;
-
- /* we need to re-evaluate prev_cpu_idle */
- for_each_online_cpu(j) {
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