Messages in this thread | | | Date | Sun, 25 May 2008 11:53:05 -0700 | From | Arjan van de Ven <> | Subject | Re: [PATCH] x86: enable preemption in delay |
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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?
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