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Message-ID: <1323340668.3904.21.camel@lappy> Date: Thu, 08 Dec 2011 12:37:48 +0200 From: Sasha Levin <levinsasha928@...il.com> To: Rusty Russell <rusty@...tcorp.com.au> Cc: "Michael S. Tsirkin" <mst@...hat.com>, Avi Kivity <avi@...hat.com>, linux-kernel@...r.kernel.org, virtualization@...ts.linux-foundation.org, kvm@...r.kernel.org, markmc@...hat.com Subject: Re: [PATCH] virtio-ring: Use threshold for switching to indirect descriptors On Thu, 2011-12-08 at 20:14 +1030, Rusty Russell wrote: > On Wed, 7 Dec 2011 17:48:17 +0200, "Michael S. Tsirkin" <mst@...hat.com> wrote: > > On Wed, Dec 07, 2011 at 04:02:45PM +0200, Sasha Levin wrote: > > > On Sun, 2011-12-04 at 20:23 +0200, Sasha Levin wrote: > > > > > > [snip] > > > > > > Rusty, Michael, does the below looks a reasonable optimization for you? > > > > OK overall but a bit hard to say for sure as it looks pretty incomplete ... > > A static threshold is very hackish; we need to either initialize it to > a proven-good value (since noone will ever change it) or be cleverer. I'll better wait to see how the threshold issue is resolved, and possibly do it as a dynamic value which depends on the threshold. I doubt theres one magic value which would work for all. -- 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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