On Fri, Mar 11, 2011 at 4:23 AM, Arnd Bergmann <arnd@xxxxxxxx> wrote: > On Friday 11 March 2011, Andrei Warkentin wrote: >> > I also don't know what the effect of setting physical_block_size >> > and/or io_min is, possibly it no longer works if they are larger >> > than the MMU page size. Need to try this. >> >> The other thing is figuring out the default size limit for when the >> page align should be performed. I suppose it's safe enough to >> set it to 1.5 size the super_page_size. But that number came from the >> Toshiba card tests. Or it could be unbounded by default. I'd rather do >> the later. > > You mean always splitting (multiples of) full super-pages from partial > super-pages when the quirk flag is enabled? > > I think it depends on the performance numbers. Do you have any > meaningful measurements without the quirk, with the current implementation > and with the unbounded case? > > If the latter two are not much different on the toshiba card, that > would be a simpler implementation, and more likely to be useful on > other cards. > Revalidating the data now, along with some more tests, to get a better picture. It seems the more data I get, the less it makes sense :(. > I think we should also do measurements to see if the same quirk > actually has any negative effects on other cards, or if there > are even cases where it helps. Going to test on Sandisk eMMC as well. Thanks, A -- To unsubscribe from this list: send the line "unsubscribe linux-mmc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
