2 Sep
2004
2 Sep
'04
8:39 p.m.
Andrea Arcangeli <andrea(a)suse.de> wrote:
if you're scared that there are too many cond_resched (I'm not scared
and people should enable them anyways if they make a difference, they
still should be less than the number of spin_unlocks with preempt
enabled), then you should add a cond_resched_costly and add a config
option that turns it off.
None of these approaches improves worst-case latency at all on SMP. If
we're not going to address the SMP problem we could just make it UP-only,
in which case increased locking costs are a non-issue.
I'd prefer that we find a solution for SMP too though.