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Subject[PATCH PoCv2 0/2] mmc: add blk-mq support
Date
Hi,

It prints a lot of scheduling while atomic warnings during
boot, lacks error handling and is otherwise incomplete but
boots successully on my Odroid-XU3 board. I hope that it
is useful to somebody.

The differences between these patches and Linus' RFD patch:
- request completion is handled from the IRQ handler
(or tasklet context as happens in dw_mmc host driver)
- adds blk-mq code while leaving old code still in place
- based on top of on Adrian's queue handling cleanups
- no support for qdepth == 2 at the moment

The patchset is based on top of commit "mmc: block:
Introduce queue semantics" from swcmdq branch by Adrian
Hunter:

http://git.infradead.org/users/ahunter/linux-sdhci.git
(swcmdq branch
commit 7a1cdc218dac843ebb4eac6d3fd24d54ba30a5b0)

The complete patchset can be found at:

https://github.com/bzolnier/linux.git mmc-blk-mq-pocv2

Changes since PoC version
(http://www.spinics.net/lists/linux-mmc/msg39351.html):
- removed most of the debugging code
- reworked the blk-mq code to be an add-on instead of
rewrite
- ported over newer swcmdq branch version
- reverted shared mmc queue changes from swcmdq as they
break mmc-mq currently
- dropped support for qdepth == 2 as it hasn't survived
the forward porting (it was ugly & not optimal anyway,
rewrite to try hwqueue == 2 idea is on TODO)
- misc cleanups

Best regards,
--
Bartlomiej Zolnierkiewicz
Samsung R&D Institute Poland
Samsung Electronics


Bartlomiej Zolnierkiewicz (2):
Revert "mmc: queue: Share mmc request array between partitions"
mmc-mq: initial blk-mq support

drivers/mmc/core/block.c | 115 ++++++++++-----
drivers/mmc/core/block.h | 3 +-
drivers/mmc/core/bus.c | 3 +-
drivers/mmc/core/core.c | 120 +++++++++++++++-
drivers/mmc/core/mmc_test.c | 16 ++-
drivers/mmc/core/queue.c | 344 +++++++++++++++++++++++++-------------------
drivers/mmc/core/queue.h | 7 +-
include/linux/mmc/card.h | 5 -
include/linux/mmc/core.h | 12 ++
9 files changed, 421 insertions(+), 204 deletions(-)

--
1.9.1

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