From: Frederic Weisbecker
The idle and io sleeptime stats can be updated concurrently from callers
of get_cpu_idle_time_us(), get_cpu_iowait_time_us() and
tick_nohz_stop_idle().
Updaters can easily race and mess up with internal datas coherency,
for example when a governor calls a
From: Frederic Weisbecker fweis...@gmail.com
The idle and io sleeptime stats can be updated concurrently from callers
of get_cpu_idle_time_us(), get_cpu_iowait_time_us() and
tick_nohz_stop_idle().
Updaters can easily race and mess up with internal datas coherency,
for example when a governor
From: Frederic Weisbecker
The idle and io sleeptime stats can be updated concurrently from callers
of get_cpu_idle_time_us(), get_cpu_iowait_time_us() and
tick_nohz_stop_idle().
Updaters can easily race and mess up with internal datas coherency,
for example when a governor calls a
From: Frederic Weisbecker fweis...@gmail.com
The idle and io sleeptime stats can be updated concurrently from callers
of get_cpu_idle_time_us(), get_cpu_iowait_time_us() and
tick_nohz_stop_idle().
Updaters can easily race and mess up with internal datas coherency,
for example when a governor
On 08/18/2013 08:04 PM, Oleg Nesterov wrote:
> Sorry for double post. forgot to cc cpufreq maintainers.
>
> On 08/16, Frederic Weisbecker wrote:
>>
>> To fix this, lets only update the sleeptime stats locally when the CPU
>> exits from idle.
>
> I am in no position to ack the changes in this
On 08/18/2013 08:04 PM, Oleg Nesterov wrote:
Sorry for double post. forgot to cc cpufreq maintainers.
On 08/16, Frederic Weisbecker wrote:
To fix this, lets only update the sleeptime stats locally when the CPU
exits from idle.
I am in no position to ack the changes in this area, but I
On Sun, Aug 18, 2013 at 06:49:37PM +0200, Oleg Nesterov wrote:
> On 08/16, Frederic Weisbecker wrote:
> >
> > To fix this, lets only update the sleeptime stats locally when the CPU
> > exits from idle.
>
> I am in no position to ack the changes in this area, but I like this
> change very much.
Sorry for double post. forgot to cc cpufreq maintainers.
On 08/16, Frederic Weisbecker wrote:
>
> To fix this, lets only update the sleeptime stats locally when the CPU
> exits from idle.
I am in no position to ack the changes in this area, but I like this
change very much. Because, as a code
On 08/16, Frederic Weisbecker wrote:
>
> To fix this, lets only update the sleeptime stats locally when the CPU
> exits from idle.
I am in no position to ack the changes in this area, but I like this
change very much. Because, as a code reader, I was totally confused by
if
On 08/16, Frederic Weisbecker wrote:
To fix this, lets only update the sleeptime stats locally when the CPU
exits from idle.
I am in no position to ack the changes in this area, but I like this
change very much. Because, as a code reader, I was totally confused by
if
Sorry for double post. forgot to cc cpufreq maintainers.
On 08/16, Frederic Weisbecker wrote:
To fix this, lets only update the sleeptime stats locally when the CPU
exits from idle.
I am in no position to ack the changes in this area, but I like this
change very much. Because, as a code
On Sun, Aug 18, 2013 at 06:49:37PM +0200, Oleg Nesterov wrote:
On 08/16, Frederic Weisbecker wrote:
To fix this, lets only update the sleeptime stats locally when the CPU
exits from idle.
I am in no position to ack the changes in this area, but I like this
change very much. Because, as
The idle and io sleeptime stats can be updated concurrently from callers
of get_cpu_idle_time_us(), get_cpu_iowait_time_us() and tick_nohz_stop_idle().
Updaters can easily race and mess up with internal datas coherency , for example
when a governor calls a get_cpu_*_time_us() API and the target
The idle and io sleeptime stats can be updated concurrently from callers
of get_cpu_idle_time_us(), get_cpu_iowait_time_us() and tick_nohz_stop_idle().
Updaters can easily race and mess up with internal datas coherency , for example
when a governor calls a get_cpu_*_time_us() API and the target
The idle and io sleeptime stats can be updated concurrently from callers
of get_cpu_idle_time_us(), get_cpu_iowait_time_us() and tick_nohz_stop_idle().
Updaters can easily race and mess up with internal datas coherency , for example
when a governor calls a get_cpu_*_time_us() API and the target
The idle and io sleeptime stats can be updated concurrently from callers
of get_cpu_idle_time_us(), get_cpu_iowait_time_us() and tick_nohz_stop_idle().
Updaters can easily race and mess up with internal datas coherency , for example
when a governor calls a get_cpu_*_time_us() API and the target
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