Subject: Re: Wart in tcp_output(), IPv6-related?
To: None <firstname.lastname@example.org>
From: Jason R Thorpe <email@example.com>
Date: 04/26/2002 18:10:35
On Sat, Apr 27, 2002 at 09:07:30AM +0900, firstname.lastname@example.org wrote:
> because when I checked MHLEN can be smaller than 100 bytes on some arch,
> and we may not be able to fit IPv4/v6 and TCP header/option into a
> single M_PKTHDR mbuf. they need to fit into a single mbuf due to
> the assumption made near line 830.
Hm. At this point, MSIZE is 256 on all platforms, so MHLEN should be
large enough everywhere.
> so, we at least preserve the following "max_linkhdr + hdrlen > MHLEN"
Ok, I'll add another counter for that, too.
> i am happy to remove "max_linkhdr + hdrlen + len <= MCLBYTES" line.
> if the line gets removed the "always-copy" behavior will go away.
Yah, that's pretty much right.
-- Jason R. Thorpe <email@example.com>