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SubjectRe: PATCH 23/10]Optimize the upload speed for PPP connection.
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From: William Allen Simpson <william.allen.simpson@gmail.com>
Date: Fri, 23 Oct 2009 07:46:08 -0400

> Concur. I'd go further than that, my code usually made room for at
> least
> a full MTU (MRU) with HDLC escaping. To minimize context switches,
> that
> should be 3014 ((1500 MRU + 2 FCS + 4 header) * 2 escapes + 2 flags).
>
> Even in the old days, when memory was tight, context switches and
> interrupt
> time were more expensive, too. PPP is supposed to scale to OC-192.

Actually I'd like to see ->obuf allocated externally and then
make it simply PAGE_SIZE.


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