Re: [PATCH net-next v2 3/4] virtio-net: auto-tune mergeable rx buffer size for improved performance

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Hi Eric, Michael,

On Wed, Jan 8, 2014 at 11:16 AM, Michael S. Tsirkin <mst@xxxxxxxxxx> wrote:
> Why should we select a frame at random and make it's truesize bigger?
> All frames are to blame for the extra space.
> Just ignoring it seems more symmetrical.
Sounds good, based on Eric's feedback and Michael's feedback above,
I will leave the 'extra space' handling as-is in the followup patchset
and will not track the extra space in ctx->truesize. AFAICT, The two
max() statements will need to remain (as buffer length may exceed
ctx->truesize).  Thanks for the feedback.

> If you intend to repost anyway (for the below wrinkle) then
> you can do it right here just as well I guess. Seems a bit prettier.
Will do.

> You don't have to fill in ctx before calling add_inbuf, do you?
> Just fill it afterwards.
Agreed, ctx does not need to be filled until after add_inbuf.

Best,

Mike
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