On Fri, Jan 31, 2014 at 09:08:25PM +0100, Peter Zijlstra wrote: > On Fri, Jan 31, 2014 at 12:01:37PM -0800, Jason Low wrote: > > On Fri, Jan 31, 2014 at 6:09 AM, Peter Zijlstra <pet...@infradead.org> > > wrote: > > > > > I've downloaded AIM7 from sf.net and I hope I'm running it with 100+ > > > loads but I'm not entirely sure I got this thing right, its not really > > > making progress with or without patch :/ > > > > Ingo's program http://lkml.org/lkml/2006/1/8/50 using the V option may > > be able to generate similar mutex contention. > > > > Currently still getting soft lockups with the updated version. > > Bugger.. ok clearly I need to think harder still. I'm fairly sure this > cancelation can work though, just seems tricky to get right :-)
We used to do something similar to avoid passing locks off to tasks that had been interrupted while spinning, and it was a bit tricky. But we had it a bit easier, because we didn't actually have to remove the element from the queue, just bypass it at lock-grant time. Thanx, Paul > I'll give that proglet from Ingo a go, although that might be Monday ere > I get to it. > -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/