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Message-ID: <503E7F9B.8010402@gmail.com> Date: Wed, 29 Aug 2012 22:46:19 +0200 From: Sasha Levin <levinsasha928@...il.com> To: "Michael S. Tsirkin" <mst@...hat.com> CC: rusty@...tcorp.com.au, virtualization@...ts.linux-foundation.org, linux-kernel@...r.kernel.org, avi@...hat.com, kvm@...r.kernel.org Subject: Re: [PATCH v2 2/2] virtio-ring: Allocate indirect buffers from cache when possible On 08/29/2012 08:12 PM, Michael S. Tsirkin wrote: >>> > > What is a good default for net? I guess max sg? >> > >> > I think that it depends on the workload. I'd say we should keep the default to 0 >> > (disabled) unless we can have a good way to adjust it to the load. > For *all* drivers? > > Then it is mostly useless. No one has the time to tweak module > parameters in real life. > > For virtio-net, 16+1 is not too much and ensures we always > use the cache. > > If that works better than 0 I would say run with 17. I was being extra-cautious with leaving it disabled until specifically enabled because I assumed that this would be one of the first comments I'll get if it was enabled by default :) If you're comfortable with setting it to a sane default like 17, I'm perfectly fine with that as well. Thanks, Sasha -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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