Messages in this thread | | | Subject | Re: [patch] sched: fix set_task_cpu() and provide an unlocked runqueue variant | From | Mike Galbraith <> | Date | Thu, 26 Nov 2009 02:31:08 +0100 |
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On Thu, 2009-11-26 at 02:01 +0100, Mike Galbraith wrote: > On Wed, 2009-11-25 at 19:27 +0100, Peter Zijlstra wrote:
> > I've got to ask, what's that barrier for? > > It's a leftover from frustrated bug hunting.
To be more specific, I put it there to ensure that min_vruntimes are stable. I figured that if try_to_wake_up() needs a barrier to look at task->state, I had better do the same for the runqueues.
-Mike
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