On Fri, Apr 06, 2018 at 07:54:47AM +0200, Maxime Ripard wrote: > Hi Jaehoon, > > On Wed, Mar 21, 2018 at 12:18:58PM +0100, Maxime Ripard wrote: > > From: Philipp Tomsich <philipp.toms...@theobroma-systems.com> > > > > Throughput tests have shown the sunxi_mmc driver to take over 10s to > > read 10MB from a fast eMMC device due to excessive delays in polling > > loops. > > > > This commit restructures the main polling loops to use get_timer(...) > > to determine whether a (millisecond) timeout has expired. We choose > > not to use the wait_bit function, as we don't need interruptability > > with ctrl-c and have at least one case where two bits (one for an > > error condition and another one for completion) need to be read and > > using wait_bit would have not added to the clarity. > > > > The observed speedup in testing on a A31 is greater than 10x (e.g. a > > 10MB write decreases from 9.302s to 0.884s). > > > > Signed-off-by: Philipp Tomsich <philipp.toms...@theobroma-systems.com> > > Signed-off-by: Maxime Ripard <maxime.rip...@bootlin.com> > > Any chance we can merge this for the next release?
Ping? Maxime -- Maxime Ripard, Bootlin (formerly Free Electrons) Embedded Linux and Kernel engineering https://bootlin.com
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