Date: Tue, 19 May 2009 19:41:33 +0900 From: Pyun YongHyeon <pyunyh@gmail.com> To: Pascal Braun <pascal.braun@continum.net> Cc: freebsd-current@freebsd.org Subject: Re: Problems with jumbo frames on nfe Message-ID: <20090519104133.GF4697@michelle.cdnetworks.co.kr> In-Reply-To: <4A127C56.6040502@continum.net> References: <4A127C56.6040502@continum.net>
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On Tue, May 19, 2009 at 11:31:02AM +0200, Pascal Braun wrote: > Hi, > > I'm currently testing jumbo frames on a Sunfire 4540 running with > FreeBSD 8-Current (build on April 8th). While using the nfe driver I'm > having some unexpected problems if i try to bring up the interface with > MTU sizes greater than 1970 bytes. > > The error message (in dmesg) is: > nfe2: initialization failed: no memory for rx buffers > It means you've run out of jumbo clusters. Check the output of "netstat -m" and see how many jumbo cluster requests were denied. > I tried to deactivate checksum offloading with -rxcsum -txcsum, but that > didn't help either. > Yeah, that has nothing to do with jumbo frame support. > If I change the mtu size on-the-fly without bringing the interface down > first, no error is logged. But the interface just isn't working. > nfe(4) is smart enough not to allocate jumbo clusters if interface is DOWN. > Does anyone have any ideas how to get jumbo frames working? > How about increasing 9K jumbo clusters(kern.ipc.nmbjumbo9) with sysctl(8)? > Regards > Pascal
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