Date: Sun, 30 Mar 2014 21:00:59 -0700 From: John-Mark Gurney <jmg@funkthat.com> To: Pyun YongHyeon <yongari@freebsd.org> Cc: svn-src-head@freebsd.org, svn-src-all@freebsd.org, src-committers@freebsd.org Subject: Re: svn commit: r263957 - in head/sys: dev/age dev/alc dev/ale dev/bce dev/bge dev/fxp dev/jme dev/msk dev/nfe dev/sge pci Message-ID: <20140331040058.GV60889@funkthat.com> In-Reply-To: <201403310154.s2V1sxXY010836@svn.freebsd.org> References: <201403310154.s2V1sxXY010836@svn.freebsd.org>
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Pyun YongHyeon wrote this message on Mon, Mar 31, 2014 at 01:54 +0000: > Author: yongari > Date: Mon Mar 31 01:54:59 2014 > New Revision: 263957 > URL: http://svnweb.freebsd.org/changeset/base/263957 > > Log: > Increase the number of TX DMA segments from 32 to 35. It turned > out 32 is not enough to support a full sized TSO packet. > While I'm here fix a long standing bug introduced in r169632 in > bce(4) where it didn't include L2 header length of TSO packet in > the maximum DMA segment size calculation. I assume all of the hardware supports this increase? Also, is there a reason to only increase up to 35 and not something larger, like 64? Is there a memory or performance penalty? -- John-Mark Gurney Voice: +1 415 225 5579 "All that I will do, has been done, All that I have, has not."
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