Re: [linux-audio-dev] Re: [announce] [patch] Voluntary Kernel Preemption Patch

On Tue, Jul 13, 2004 at 03:44:48PM -0700, Andrew Morton wrote: What I'm doing is basically to replace all might_sleep with cond_resched and then I add might_sleep in cond_resched. I also merged all new might_sleep in Ingo's patch (converted to cond_resched). We'll see what happens then when I try to boot such a thing (the sti and sched_yield already given me some troubles). I was considering adding a cond_resched_costly but I didn't see anything really that costly to need a CONFIG_LOW_RESCHED_OVERHEAD. btw, cond_resched should only be defined as might_sleep with PREEMPT enabled, otherwise it's pointless to check need_resched at almost every spin_unlock and to do it during cond_resched too. if might_sleep doesn't BUG it means we didn't need to check need_resched in the first place if preempt is enabled. cond_resched_lock is another story of course.