Date: Fri, 25 Feb 2005 11:35:51 +1100 From: Emil Mikulic <emikulic@dmr.ath.cx> To: freebsd-current@freebsd.org Subject: Re: panic: Duplicate free of item 0xc2580a00 from zone 0xc103e9a0(Mbuf) Message-ID: <20050225003551.GA4122@dmr.ath.cx> In-Reply-To: <421DEB5D.9090703@alumni.rice.edu> References: <Pine.NEB.3.96L.1050224100334.95733F-100000@fledge.watson.org> <421DEB5D.9090703@alumni.rice.edu>
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On Thu, Feb 24, 2005 at 08:57:33AM -0600, Jon Noack wrote: > From src/sys/pci/if_rl.c: > "The RealTek 8139 PCI NIC redefines the meaning of 'low end.' This is > probably the worst PCI ethernet controller ever made, with the possible > exception of the FEAST chip made by SMC. The 8139 supports bus-master > DMA, but it has a terrible interface that nullifies any performance > gains that bus-master DMA usually offers. > ..." > > I would bet that (in)famous comment coupled with everyone recommending > fxp or em adapters[1] causes most who experience problems to abandon rl > adapters at the first hint of trouble. A few weeks ago I was copying a large file from a machine with an rl interface to a machine with an fxp one. Both were running 6-CURRENT with almost identical kernel configs. top showed the rl irq was eating 20% of the CPU time of a 1050MHz K7. On the other end, the fxp irq was eating 1% of a 400MHz Pentium II. > [1] I use fxp and em adapters and I've never had a problem with them. > As such, I can't argue with the recommendation. Seconded. --Emil
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