Move xen patchset to new version's subdir.

[ipfire-2.x.git] / src / patches / suse-2.6.27.31 / patches.drivers / cpufreq_get_cpu_idle_time_changes_3.patch

diff --git a/src/patches/suse-2.6.27.31/patches.drivers/cpufreq_get_cpu_idle_time_changes_3.patch b/src/patches/suse-2.6.27.31/patches.drivers/cpufreq_get_cpu_idle_time_changes_3.patch
new file mode 100644 (file)
index 0000000..5a47f9f
--- /dev/null
+++ b/src/patches/suse-2.6.27.31/patches.drivers/cpufreq_get_cpu_idle_time_changes_3.patch
@@ -0,0 +1,97 @@
+From: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
+Subject: cpufreq,ondemand: Prepare changes for doing micro-accounting
+
+Preparatory changes for doing idle micro-accounting in ondemand governor.
+get_cpu_idle_time() gets extra parameter and returns idle time and also the
+wall time that corresponds to the idle time measurement.
+
+Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
+Signed-off-by: Thomas Renninger <trenn@suse.de>
+
+---
+ drivers/cpufreq/cpufreq_ondemand.c |   29 +++++++++++++++--------------
+ 1 file changed, 15 insertions(+), 14 deletions(-)
+
+Index: cpufreq.git/drivers/cpufreq/cpufreq_ondemand.c
+===================================================================
+--- cpufreq.git.orig/drivers/cpufreq/cpufreq_ondemand.c        2008-07-31 14:52:01.000000000 -0700
++++ cpufreq.git/drivers/cpufreq/cpufreq_ondemand.c     2008-07-31 14:52:10.000000000 -0700
+@@ -94,13 +94,13 @@ static struct dbs_tuners {
+       .powersave_bias = 0,
+ };
+ 
+-static inline cputime64_t get_cpu_idle_time(unsigned int cpu)
++static inline cputime64_t get_cpu_idle_time(unsigned int cpu, cputime64_t *wall)
+ {
+       cputime64_t idle_time;
+-      cputime64_t cur_jiffies;
++      cputime64_t cur_wall_time;
+       cputime64_t busy_time;
+ 
+-      cur_jiffies = jiffies64_to_cputime64(get_jiffies_64());
++      cur_wall_time = jiffies64_to_cputime64(get_jiffies_64());
+       busy_time = cputime64_add(kstat_cpu(cpu).cpustat.user,
+                       kstat_cpu(cpu).cpustat.system);
+ 
+@@ -113,7 +113,10 @@ static inline cputime64_t get_cpu_idle_t
+                               kstat_cpu(cpu).cpustat.nice);
+       }
+ 
+-      idle_time = cputime64_sub(cur_jiffies, busy_time);
++      idle_time = cputime64_sub(cur_wall_time, busy_time);
++      if (wall)
++              *wall = cur_wall_time;
++
+       return idle_time;
+ }
+ 
+@@ -277,8 +280,8 @@ static ssize_t store_ignore_nice_load(st
+       for_each_online_cpu(j) {
+               struct cpu_dbs_info_s *dbs_info;
+               dbs_info = &per_cpu(cpu_dbs_info, j);
+-              dbs_info->prev_cpu_idle = get_cpu_idle_time(j);
+-              dbs_info->prev_cpu_wall = get_jiffies_64();
++              dbs_info->prev_cpu_idle = get_cpu_idle_time(j,
++                                              &dbs_info->prev_cpu_wall);
+       }
+       mutex_unlock(&dbs_mutex);
+ 
+@@ -368,21 +371,19 @@ static void dbs_check_cpu(struct cpu_dbs
+               int freq_avg;
+ 
+               j_dbs_info = &per_cpu(cpu_dbs_info, j);
+-              cur_wall_time = jiffies64_to_cputime64(get_jiffies_64());
++
++              cur_idle_time = get_cpu_idle_time(j, &cur_wall_time);
++
+               wall_time = (unsigned int) cputime64_sub(cur_wall_time,
+                               j_dbs_info->prev_cpu_wall);
+               j_dbs_info->prev_cpu_wall = cur_wall_time;
+ 
+-              cur_idle_time = get_cpu_idle_time(j);
+               idle_time = (unsigned int) cputime64_sub(cur_idle_time,
+                               j_dbs_info->prev_cpu_idle);
+               j_dbs_info->prev_cpu_idle = cur_idle_time;
+ 
+-              if (unlikely(wall_time <= idle_time ||
+-                           (cputime_to_msecs(wall_time) <
+-                            dbs_tuners_ins.sampling_rate / (2 * 1000)))) {
++              if (unlikely(!wall_time || wall_time < idle_time))
+                       continue;
+-              }
+ 
+               load = 100 * (wall_time - idle_time) / wall_time;
+ 
+@@ -531,8 +532,8 @@ static int cpufreq_governor_dbs(struct c
+                       j_dbs_info = &per_cpu(cpu_dbs_info, j);
+                       j_dbs_info->cur_policy = policy;
+ 
+-                      j_dbs_info->prev_cpu_idle = get_cpu_idle_time(j);
+-                      j_dbs_info->prev_cpu_wall = get_jiffies_64();
++                      j_dbs_info->prev_cpu_idle = get_cpu_idle_time(j,
++                                              &j_dbs_info->prev_cpu_wall);
+               }
+               this_dbs_info->cpu = cpu;
+               /*
+
+--