On Sat, 17 Nov 2007, Kip Macy wrote: > On Nov 17, 2007 10:33 AM, Denis Shaposhnikov <dsh_at_vlink.ru> wrote: >> On Sat, 17 Nov 2007 00:42:54 -0500 (EST) >> Mike Andrews <mandrews_at_bit0.com> wrote: >> >>> Has anyone run into problems with MSS not being respected when using >>> TSO, specifically on em cards? >> >> Yes, I wrote about this problem on the beginning of 2007, see >> >> http://tinyurl.com/3e5ak5 >> > > if_em.c:3502 > /* > * Payload size per packet w/o any headers. > * Length of all headers up to payload. > */ > TXD->tcp_seg_setup.fields.mss = htole16(mp->m_pkthdr.tso_segsz); > TXD->tcp_seg_setup.fields.hdr_len = hdr_len; > > > Please print out the value of tso_segsz here. It appears to be being > set correctly. The only thing I can think of is that t_maxopd is not > correct. As tso_segsz is correct here: It repeatedly prints 1368 during a 1 meg file transfer over a connection with a 1380 MSS. Any other printf's I can add? I'm working on a web page with tcpdump / firewall log output illustrating the issue...Received on Sat Nov 17 2007 - 21:33:25 UTC
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