Jarek Poplawski wrote:
On 12-10-2007 00:23, Peter Williams wrote:
...
The reason I was going that route was for modularity (which helps when
adding plugsched patches). I'll submit a revised patch for consideration.
...
IMHO, it looks like modularity could suck here:
+static unsigned int default_timeslice_fair(struct task_struct *p)
+{
+ return NS_TO_JIFFIES(sysctl_sched_min_granularity);
+}
If it's needed for outside and sched_fair will use something else
(to avoid double conversion) this could be misleading. Shouldn't
this be kind of private and return something usable for the class
mainly?
This is supplying data for a system call not something for internal use
by the class. As far as the sched_fair class is concerned this is just
a (necessary - because it's need by a system call) diversion.
Why anything else than sched_fair should care about this?
sched_fair doesn't care so if nothing else does why do we even have
sys_sched_rr_get_interval()? Is this whole function an anachronism that
can be expunged? I'm assuming that the reason it exists is that there
are user space programs that use this system call. Am I correct in this
assumption? Personally, I can't think of anything it would be useful
for other than satisfying curiosity.
Peter
--
Peter Williams [email protected]
"Learning, n. The kind of ignorance distinguishing the studious."
-- Ambrose Bierce
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