Date: Tue, 10 Jun 2008 11:25:39 +0300 From: "Yony Yossef" <yonyossef.lists@gmail.com> To: freebsd-net@freebsd.org Subject: tso_segsz and mss above jumbo MTU in FreeBSD 7 Message-ID: <20def4870806100125l7b5b1e6fhd295d46d1106abb5@mail.gmail.com>
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Hi All. I'm working on a 10GigE driver for FreeBSD 7. Looking at other GigE and 10GigE drivers I've seen that mbuf->m_pkthdr.tso_segsz is assigned to MSS (Max Segment Size) on the Tx routines. If I understand correctly the tso_segsz is supposed to inform the driver with the MTU set by the OS, therefore it should change upon ifconfig mtu commands. When I set my MTU to 9600 I still recieve tso_segsz=1500 in the Tx mbufs from the OS. Where's my mistake here? Yony
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