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Date: Thu, 07 Dec 2006 13:20:26 +0100
From: Andre Oppermann <andre@freebsd.org>
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To: Gleb Smirnoff <glebius@FreeBSD.org>
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Cc: Perforce Change Reviews <perforce@FreeBSD.org>,
	Paolo Pisati <piso@FreeBSD.org>
Subject: Re: PERFORCE change 111230 for review
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Gleb Smirnoff wrote:
> On Wed, Dec 06, 2006 at 11:19:42PM +0000, Paolo Pisati wrote:
> P> http://perforce.freebsd.org/chv.cgi?CH=111230
> P> 
> P> Change 111230 by piso@piso_newluxor on 2006/12/06 23:19:06
> P> 
> P> 	To workaround a problem when an mbuf is bigger than MCLBYTES
> P> 	(and thus not handled by m_megapullup()), introduce & use
> P> 	m_jumbo16pullup() that uses 16k jumbo size cluster.
> P> 	
> P> 	This problem only showed up on traffic generated on a box with 
> P> 	a nic tso enabled.
> 
> Paolo,
> 
> this isn't a fix. Another application will do write(,, 16k + 1) and
> m_jumbo16pullup() will fail again. Please backout it, it is a hack.
> 
> We need to fix TSO in such way that real packets, that will be
> transmitted to wire, will be passed to pfil handlers.

That is not possible.

-- 
Andre