Liu, Hong wrote:
POSIX says: POSIX timers should not expire before their scheduled time.
Due to the timer started between jiffies, there are cases that the timer
will expire before its scheduled time.
This patch ensures timers will not expire early.
--- a/kernel/posix-timers.c 2005-03-10 15:46:27.329333664 +0800
+++ b/kernel/posix-timers.c 2005-03-10 15:50:11.884196136 +0800
@@ -957,7 +957,8 @@
&expire_64, &(timr->wall_to_prev))) {
return -EINVAL;
}
- timr->it_timer.expires = (unsigned long)expire_64;
+ timr->it_timer.expires = (unsigned long)expire_64 + 1;
tstojiffie(&new_setting->it_interval, clock->res, &expire_64);
timr->it_incr = (unsigned long)expire_64;
Has this happened?? The following code (in adjust_abs_time()) is supposed to
prevent this sort of thing:
if (oc.tv_sec | oc.tv_nsec) {
oc.tv_nsec += clock->res;
timespec_norm(&oc);
}
Also, we run rather extensive tests for this sort of thing.
--
George Anzinger george@mvista.com
High-res-timers: http://sourceforge.net/projects/high-res-timers/
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