Hi, Since Linus Walleij is also working on that and I won't probably have time to touch this code till the end of upcoming month, here it is (basically a code dump of my proof-of-concept work). I hope that it would be useful to somebody. It is extremely ugly & full of bogus debug code but boots fine on my Odroid-XU3 and benchmarks can be run. The patchset is based on top of patches up to "[PATCH v3 24/30] mmc: block: Introduce queue semantics" patch from "[PATCH V3 00/30] mmc: mmc: dd Software Command Queuing" series by Adrian Hunter: http://www.spinics.net/lists/linux-mmc/msg38013.html [ It was commmit f3ba397441825f99edb4833a5f52dd2355d253c7 in swcmdq branch from: http://git.infradead.org/users/ahunter/linux-sdhci.git Unfortunalty it got rebased later to V4 -- my patchset probably still applies and works fine but I have not tested this yet. ] PS Linus, I got async requests support working, see patch #7. You may be able to use this method depending on the hackiness level of your patches. ;) Initial benchmark results: root@target:~# time dd if=/dev/mmcblk0 of=/dev/null bs=4k vanilla - performance governor - 1300MHz/1800MHz 15758000128 bytes (16 GB) copied, 69.8334 s, 226 MB/s blk-mq - performance governor - 1300MHz/1800MHz 15758000128 bytes (16 GB) copied, 79.0868 s, 199 MB/s vanilla - performance governor - 200MHz/200MHz 15758000128 bytes (16 GB) copied, 228.014 s, 69.1 MB/s blk-mq - performance governor - 200MHz/200MHz 15758000128 bytes (16 GB) copied, 208.536 s, 75.6 MB/s vanilla - on-demand governor - 1300MHz/1800MHz 15758000128 bytes (16 GB) copied, 77.0968 s, 204 MB/s blk-mq - on-demand governor - 1300/1800MHz 15758000128 bytes (16 GB) copied, 96.351 s, 164 MB/s root@target:~# time dd if=/dev/mmcblk0 of=/dev/null vanilla - on-demand governor - 1300MHz/1800MHz 15758000128 bytes (16 GB) copied, 155.149 s, 102 MB/s blk-mq - on-demand governor - 1300MHz/1800MHz 15758000128 bytes (16 GB) copied, 106.122 s, 148 MB/s Bartlomiej Zolnierkiewicz (7): mmc-mq: add debug printks mmc-mq: remove async requests support mmc-mq: request completion fixes mmc-mq: implement checking for queue busy condition mmc-mq: remove some debug printks mmc-mq: initial blk-mq support mmc-mq: async request support for blk-mq mode drivers/mmc/card/block.c | 174 +++++++++++++------------- drivers/mmc/card/mmc_test.c | 8 +- drivers/mmc/card/queue.c | 262 ++++++++++++++++++++++++++------------ drivers/mmc/card/queue.h | 50 +++++++- drivers/mmc/core/bus.c | 2 - drivers/mmc/core/core.c | 299 +++++++++++++++++++++++++++++--------------- drivers/mmc/core/core.h | 2 - drivers/mmc/core/mmc_ops.c | 9 ++ drivers/mmc/host/dw_mmc.c | 3 +- include/linux/mmc/card.h | 1 - include/linux/mmc/core.h | 6 +- include/linux/mmc/host.h | 15 --- 12 files changed, 529 insertions(+), 302 deletions(-) -- 1.9.1 -- 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
