Date: Wed, 22 Jan 2014 18:52:00 -0500 From: Garrett Wollman <wollman@freebsd.org> To: net@freebsd.org Subject: Use of contiguous physical memory in cxgbe driver Message-ID: <21216.22944.314697.179039@hergotha.csail.mit.edu>
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At this point everyone is well aware that requiring contiguous physical page when the hardware can do scatter-gather is a very bad idea. I have a new server under test (running 9.2) which uses Chelsio rather than Intel 10G Ethernet controllers. We fixed the Intel driver not to use more-than-page-sized jumbo mbufs. Can anyone say with certainty whether the Chelsio hardware actually requires physically-contiguous allocations for jumbo frames? Has this already been fixed in a more recent driver? (The hardware is identified specifically as a T420-CR.) -GAWollman
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