Messages in this thread | | | Subject | Re: [patch 00/19] VM pageout scalability improvements | From | Lee Schermerhorn <> | Date | Fri, 04 Jan 2008 12:06:12 -0500 |
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On Fri, 2008-01-04 at 17:34 +0100, Andi Kleen wrote: > Lee Schermerhorn <Lee.Schermerhorn@hp.com> writes: > > > We can easily [he says, glibly] reproduce the hang on the anon_vma lock > > Is that a NUMA platform? On non x86? Perhaps you just need queued spinlocks?
We see this on both NUMA and non-NUMA. x86_64 and ia64. The basic criteria to reproduce is to be able to run thousands [or low 10s of thousands] of tasks, continually increasing the number until the system just goes into reclaim. Instead of swapping, the system seems to hang--unresponsive from the console, but with "soft lockup" messages spitting out every few seconds...
Lee
> > -Andi
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