Re: [PATCH 06/10] posix-cpu-timers: fix wrong timer initialization
From: Olivier Langlois
Date: Tue Apr 30 2013 - 09:35:01 EST
On Mon, 2013-04-29 at 23:17 -0400, kosaki.motohiro@xxxxxxxxx wrote:
> From: KOSAKI Motohiro <kosaki.motohiro@xxxxxxxxxxxxxx>
> Currently glibc's rt/tst-cputimer1 testcase is spradically fail because
> a timer created by timer_create() may fire earlier than it's specified.
> posix_cpu_timer_set() uses "val" as current time for three purpose. 1)
> initialize sig->cputimer. 2) calculation "old" val. 3) calculations an
> expires time.
> (1) and (2) should be used only committed time (i.e. without delta_exec)
> because run_posix_cpu_timers() don't care of delta_exec and we need
> consistency. But (3) need exact current time (aka cpu clock time) beucase
> an expires should be "now + timeout" by definition.
> This patch makes separete two kind of "now".
I must admit that this solution is simpler to what I originally
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