Greetings,
For many of us, the kernel thread scheduling resolution is
10ms (see getitimer(2)). By adding 1 jiffy to the time to
sleep in sys_nanosleep(), threads are sleeping 10ms too long.
timespec_to_jiffies() does a good job at returning the
appropriate number of jiffies to sleep. There is no need to
add one for good measure.
Patch is good for 2.4.16 and 2.5.0.
Mike Arras
mkarras110@yahoo.com
diff -urN linux-2.4.16/kernel/timer.c better/kernel/timer.c
--- linux-2.4.16/kernel/timer.c Mon Oct 8 13:41:41 2001
+++ better/kernel/timer.c Wed Nov 28 00:23:15 2001
@@ -825,7 +825,7 @@
return 0;
}
- expire = timespec_to_jiffies(&t) + (t.tv_sec || t.tv_nsec);
+ expire = timespec_to_jiffies(&t);
current->state = TASK_INTERRUPTIBLE;
expire = schedule_timeout(expire);
--
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