Tom Chen wrote:
During the NICDrv load_unload test, we recently notice that, recent
OpenSolaris release (nv119, 121) requests the driver to send large
packet (larger than mtu) but does not indicate TSO/LSO offload.
Earlier version of OpenSolaris, like nv112, do not have this issue. I
am afraid this is a new bug of OpenSolaris.
Below are our code in the sending path and what we found:
hcksum_retrieve(mp, NULL, NULL, NULL, NULL, NULL, NULL, &pflags); if
(pflags != 0) { uint32_t lso_flags = 0; lso_info_get(mp, &mss,
&lso_flags); use_lso = (lso_flags == HW_LSO); } else { if (total_len
> 1536) { cmn_err(CE_WARN, "large Tx packet: %d\n", total_len); } }
Where is total_len coming from and what did you report as your MTU to
the stack when you registered?
Paul
--
===================================
Paul Durrant
http://www.linkedin.com/in/pdurrant
===================================
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