Stephen Warren <swar...@wwwdotorg.org> writes: > On 03/31/2016 06:28 PM, Eric Anholt wrote: >> This approximately triples write performance for the SD card. My card >> is too full of important data to collect very reliable numbers, but I >> see 271.361% +/- 166.742% improvement (n=3 before, 6 after), for 'dd >> if=/dev/zero of=/boot/asdf bs=1M count=3 oflag=dsync,direct'. Read >> performance appears to be unaffected. > > I thought that switching the defconfig wasn't possible, since this HW > module relies on the SoC core clock, and that can be asynchronously > changed by the FW running on the VideoCore. Consequently, this change > isn't safe unless the user puts non-default options in their config.txt. > > The same comment applies to "[PATCH 1/4] ARM: bcm2835: Switch BCM2835 to > sdhci-iproc.c for MMC" in the other series.
I think you're thinking of SDHOST, the other controller? This is just switching implementations for the EMMC controller so that eventually we can delete our old implementation.
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