Date: Sun, 18 Sep 2011 17:27:01 -0700 From: Garrett Cooper <yanegomi@gmail.com> To: Dieter BSD <dieterbsd@engineer.com> Cc: freebsd-hackers@freebsd.org Subject: Re: checksum offload Message-ID: <CAGH67wT%2Bokc86BJxComZNKXuZhYWyyGfMRLrSBerepEWyv%2BqWg@mail.gmail.com> In-Reply-To: <20110919002304.219780@gmx.com> References: <20110919002304.219780@gmx.com>
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On Sun, Sep 18, 2011 at 5:23 PM, Dieter BSD <dieterbsd@engineer.com> wrote: >> The data sheet for intel 82576 advertises IP TX/RX checksum offload >> but the driver does not set CSUM_IP in ifp->if_hwassist. Does this mean that >> driver (and chip) do not support IP TX checksum offload or the support for >> TX is not yet included in the driver? > > The first question is "is checksum offload a good idea?" > There is less protection against errors. This assumes firmware flaws, right? Albeit, it also does confuse some software like tcpdump. -Garrett
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