[RFC PATCH] hrtimers: system-wide and per-task hrtimer slacks
dmitry.antipov at linaro.org
Fri Apr 6 09:14:46 UTC 2012
On 04/05/2012 04:10 AM, Andrew Morton wrote:
> Well.. there are some back-incompatibilities here.
> prctl(PR_SET_TIMERSLACK, -1) used to restore current's slack setting to
> whatever-we-inherited-at-fork, but that has been removed. What are the
> implications of this, and did we need to do it?
It seems you're looking at the previous version of this patch
(http://lkml.org/lkml/2012/2/20/55). Latest proposal is
http://lwn.net/Articles/484162/, which defines PR_SET_TIMERSLACK
if (arg2 <= 0)
else if (arg2 <= HRTIMER_MAX_SLACK)
current->timer_slack_ns = arg2;
error = -EINVAL;
> If we do make changes in this area then the prctl manpage should be
> updated, please. And if
> http://www.spinics.net/lists/linux-man/msg01149.html represents the
> current state of that manpage then it should be updated anyway - that
> entry doesn't say anything about the (arg2<= 0) case.
I sent a patch for man pages too, it should be one of the recent posts
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