I am glad to hear that your problem has been solved! In regards to the max MTU setting: The hardware has a set limit on supported maximum frame size (9018), and with the addition of the VLAN_HLEN (4) in calculating the header size (now it is 22) , the max configurable MTU is now 8996.
Dave Ertman -----Original Message----- From: Hrvoje Habjanić [mailto:[email protected]] Sent: Sunday, July 20, 2014 1:45 AM To: Ertman, David M; [email protected] Subject: Re: [E1000-devel] [PATCH] Packet drops/loss with 82579LM - fixed Hi. On 19.06.2014 11:33, Hrvoje Habjanić wrote: > On 10.06.2014 17:08, Hrvoje Habjanić wrote: >> On 09.06.2014 17:46, Ertman, DavidX M wrote: >> >>> Good Morning, >>> >>> The fix for this went into the in-kernel driver with commit 77e61146c677 >>> "e1000e: Workaround for dropped packets in Gig/100 speeds on 82579". >>> >>> The same fix should be in the e1000e-3.0.4.1 SourceForge driver. Could you >>> please double-check? >> [snip] >> >> It seems that just un-setting HV_PM_CTRL_K1_ENABLE (bit 14, 0x4000) >> is not enough. Why, i do not know. But, setting bit 13 (0x2000) seems >> to do the trick. > Please note that this is "LM" version on which i'm testing. This means > that interface is shared with AMT. And, i do have AMT enabled. > > Could this cause havoc with K1? Can AMT somehow mess with registers > and cause problems? Great news! It seems that last 3.1.0.2 does solve my problem with 82579LM (kernel 3.15.6). I'll try to test it more properly, but initial tests are ok. :-) Regards, H. p.s. Hm ... I can not put mtu=9000 anymore, but mtu=8996 works ...? ------------------------------------------------------------------------------ Want fast and easy access to all the code in your enterprise? Index and search up to 200,000 lines of code with a free copy of Black Duck Code Sight - the same software that powers the world's largest code search on Ohloh, the Black Duck Open Hub! Try it now. http://p.sf.net/sfu/bds _______________________________________________ E1000-devel mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/e1000-devel To learn more about Intel® Ethernet, visit http://communities.intel.com/community/wired
