linux-kernel - Re: [PATCH v2 2/2] virtio-ring: Allocate indirect buffers from cache when possible

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Message-ID: <877gs7inx8.fsf@rustcorp.com.au>
Date:	Thu, 06 Sep 2012 17:27:23 +0930
From:	Rusty Russell <rusty@...tcorp.com.au>
To:	"Michael S. Tsirkin" <mst@...hat.com>
Cc:	Sasha Levin <levinsasha928@...il.com>,
	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

"Michael S. Tsirkin" <mst@...hat.com> writes:
> Yes without checksum net core always linearizes packets, so yes it is
> screwed.
> For -net, skb always allocates space for 17 frags + linear part so
> it seems sane to do same in virtio core, and allocate, for -net,
> up to max_frags + 1 from cache.
> We can adjust it: no _SG -> 2 otherwise 18.

But I thought it used individual buffers these days?

Cheers,
Rusty.
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