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SubjectTest for CFS Bandwidth Control V6
Hi Paul,

I'm so sorry for sending this mail in the new thread, since i didn't
receive your V6 patchset from LKML.

It seams the patchset can not be applied, since it's conflict between
patch 3 and patch 5:

========Quote========
[patch 03/15] sched: introduce primitives to account for CFS bandwidth tracking

+#ifdef CONFIG_CFS_BANDWIDTH
+ int runtime_enabled;
+ s64 runtime_remaining;
+#endif
#endif
};

+#ifdef CONFIG_CFS_BANDWIDTH
+static inline struct cfs_bandwidth *tg_cfs_bandwidth(struct task_group *tg)
+{
+ return &tg->cfs_bandwidth;
+}
+
+static inline u64 default_cfs_period(void);
+

[patch 05/15] sched: add a timer to handle CFS bandwidth refresh

@@ -394,12 +400,38 @@ static inline struct cfs_bandwidth *tg_c

#ifdef CONFIG_CFS_BANDWIDTH
static inline u64 default_cfs_period(void);
+static int do_sched_cfs_period_timer(struct cfs_bandwidth *cfs_b, int overrun);
+
+static enum hrtimer_restart sched_cfs_period_timer(struct hrtimer *timer)
+{
+ struct cfs_bandwidth *cfs_b =
+ container_of(timer, struct cfs_bandwidth, period_timer);
+ ktime_t now;
+ int overrun;

========End quote========

I downloaded the patchset from Internet, i missed the newer version?

I have done some test after fixed the conflict by handle, below test can cause
box crash:

========Quote cpu_hotlpug.sh ========
#!/bin/sh

ROOT_PATH="/mnt"

def_quota=30000
def_period=100000

pid=
creat_process()
{

nice -n $1 cat /dev/zero > /dev/null &
pid=$!

if [ $2 -ne -1 ]; then
taskset -pc $2 $pid &> /dev/null
fi
}
HOTPLUG_PATH=$ROOT_PATH/cpu-hotplug

mount -t cgroup -o cpu none $ROOT_PATH

mkdir $HOTPLUG_PATH

echo $def_quota > $HOTPLUG_PATH/cpu.cfs_quota_us
echo $def_period > $HOTPLUG_PATH/cpu.cfs_period_us
# create 3 tasks for every cpu

for((i=0;i<3;i++))
{
creat_process -6 1
echo $pid > $HOTPLUG_PATH/tasks
}
for((i=0;i<3;i++))
{
creat_process -6 2
echo $pid > $HOTPLUG_PATH/tasks
}
for((i=0;i<3;i++))
{
creat_process -6 3
echo $pid > $HOTPLUG_PATH/tasks
}
echo 0 > /sys/devices/system/cpu/cpu1/online
echo 1 > /sys/devices/system/cpu/cpu1/online
echo 0 > /sys/devices/system/cpu/cpu2/online
echo 1 > /sys/devices/system/cpu/cpu2/online
echo 0 > /sys/devices/system/cpu/cpu3/online
echo 1 > /sys/devices/system/cpu/cpu3/online
killall -9 cat

rmdir $HOTPLUG_PATH
umount $ROOT_PATH
======== End quote cpu_hotlpug.sh ========
Sorry to disturb you if the bug is know.

Thanks!



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