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Date: Mon, 25 Aug 2008 14:05:22 -0700 (PDT) From: David Miller <davem@...emloft.net> To: ron.mercer@...gic.com Cc: jeff@...zik.org, Linux-Driver@...gic.com, netdev@...r.kernel.org Subject: Re: [RFC] New Qlogic 10Gb Ethernet driver for 2.6.28 From: Ron Mercer <ron.mercer@...gic.com> Date: Mon, 25 Aug 2008 10:01:48 -0700 > I see your point. I will add the re-alignment but would like to jump > over it for platforms that don't need it. Is there a list somewhere of > the RISC platforms that take a trap on unaligned accesses? Or better > yet, a list of those that don't? If you're only doing this for the header portion it's not so much of a cost. For sizable packets you're using page references, and you don't have to copy those, such copies of the headers will also warm up the CPU cache as a nice side effect. Furthermore you stated that the alignment restriction only is necessary for early revisions of the hardware. Please, I do not want to give you a list of platform names to ifdef up your driver with, that's messy. Just make the copy when necessary to align things properly. -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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