Date: Mon, 18 Apr 2011 19:00:24 GMT From: Ian Lepore <freebsd@damnhippie.dyndns.org> To: freebsd-arm@FreeBSD.org Subject: Re: arm/155214: [patch] MMC/SD IO slow on Atmel ARM with modern large SD cards Message-ID: <201104181900.p3IJ0OWs079642@freefall.freebsd.org>
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The following reply was made to PR arm/155214; it has been noted by GNATS. From: Ian Lepore <freebsd@damnhippie.dyndns.org> To: bug-followup@FreeBSD.org Cc: Subject: Re: arm/155214: [patch] MMC/SD IO slow on Atmel ARM with modern large SD cards Date: Mon, 18 Apr 2011 12:45:28 -0600 I have an updated patch for this which includes better error handling, and better read performance (mainly by splitting large IO requests into two DMA operations and doing the byte-swapping for the first half while the second half is still on the wire from the card). It also has more comments about what works and what doesn't (ex: 30mhz 4-bit transfers when USB Host mode is also enabled). I don't see any straightforward way on the PR page to nuke the original patch and supply a replacement. What's the best way to handle that? -- Ian
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