Re: [PATCH v2 1/3] process cputimer is moving faster than its corresponding clock

Frederic Weisbecker
2013-04-29T00:45:58Z

2013/4/27 Olivier Langlois <olivier@trillion01.com>:
>
>
> Forbids the cputimer to drift ahead of its process clock by
> blocking its update when a tick occurs while a autoreaping task
> is currently in do_exit() between the call to release_task() and
> its final call to schedule().
>
> Any task stats update after having called release_task() will
> be lost because they are added to the global process stats located
> in the signal struct from release_task().
>
> Ideally, you should postpone the release_task() call after the
> final context switch to get all the stats added but this is
> more complex to achieve.
>
> In other words, this is slowing down the cputimer so it keep the same
> pace than the process clock but in fact, what should be done is to
> speed up the process clock by adding the missing stats to it.
>
> Signed-off-by: Olivier Langlois <olivier@trillion01.com>

Thanks.

Could you please resend these three patches in a new mail thread to
make reviews easier? Also it would be nice to propose a different
subject for each individual patch. Each of which describing what the
patch does in a few words.

Thanks.