Messages in this thread | | | Date | Mon, 17 Oct 2005 19:03:14 +0530 | From | Dipankar Sarma <> | Subject | Re: [RCU problem] was VFS: file-max limit 50044 reached |
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On Mon, Oct 17, 2005 at 03:28:22PM +0200, Eric Dumazet wrote: > Dipankar Sarma a écrit : > >On Mon, Oct 17, 2005 at 02:10:09PM +0200, Eric Dumazet wrote: > > > > > >Can you try it with rcupdate.maxbatch set to 10000 in boot > >command line ? > > > > Changing maxbatch from 10 to 10000 cures the problem. > Maybe we could initialize maxbatch to (10000000/HZ), considering no current > cpu is able to queue more than 10.000.000 items per second in a list.
I don't know, maybe I can look at a more adaptive heuristics.
> > > >FWIW, the open/close test problem goes away if I set maxbatch to > >10000. I had introduced this limit some time ago to curtail > >the effect long running softirq handlers have on scheduling > >latencies, which now conflicts with OOM avoidance requirements. > > Yes, and probably OOM avoidance has a higher priority than latencies in DOS > situations...
Yes, one would think. But the audio guys would chew my head for this :)
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