Hi Hoan, On Wed, Sep 19, 2018 at 06:44:30PM +0000, Hoan Tran wrote: > This patch adds CPU hotplug support where the PMU migrates the context to > another online CPU when its CPU is offline. > > It fixes the below issue where the user does offline the CPU which is assigned > to this PMU. > > Assuming, CPU0 is assigned for this PMU. When the user does offline CPU0 > [root@(none) ~]# echo 0 > /sys/devices/system/cpu/cpu0/online > This PMU does not work anymore and shows the below error. > [root@(none) ~]# perf stat -a -e l3c0/cycle-count/,l3c0/write/ sleep 1 > Error: > The sys_perf_event_open() syscall returned with 19 (No such device) for event > (l3c0/cycle-count/). > /bin/dmesg may provide additional information. > No CONFIG_PERF_EVENTS=y kernel support configured? > > With this patch, when CPU0 is offline, PMU migrates to another online CPU and > works on that CPU. > > Signed-off-by: Hoan Tran <[email protected]> > --- > v2: > * Remove the cpuhp instance when unregistering the PMU
Unfortunately, this has come through whitespae-damaged, with a disclaimer in the footer. Could you please resend with those two details fixed? Thanks, Mark.
