On Sun, 25 May 2008, Arjan van de Ven wrote:

quoted text
> On Sat, 24 May 2008 23:11:20 -0400 (EDT)
> Steven Rostedt <rostedt@goodmis.org> wrote:
> > 
> > In git commit 35d5d08a085c56f153458c3f5d8ce24123617faf, Andrew Morton
> > placed preempt_disable around the entire delay due to TSC's not
> > working nicely on SMP.  Unfortunately for those that care about
> > latencies this is devastating! Especially when we have callers to
> > mdelay(8).
> 
> we used to have a WARN_ON if mdelay was called while preemptable..
> maybe we should put that back in?

We'd better have one which warns, when mdelay is called with
preemption disabled.

Thanks,
	tglx

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