On Fri, Nov 3, 2017 at 2:20 PM, Adrian Hunter <adrian.hunter@xxxxxxxxx> wrote:
> Until mmc has blk-mq support fully implemented and tested, add a
> parameter use_blk_mq, default to false unless config option MMC_MQ_DEFAULT
> is selected.
>
> Signed-off-by: Adrian Hunter <adrian.hunter@xxxxxxxxx>
(...)
> +config MMC_MQ_DEFAULT
> + bool "MMC: use blk-mq I/O path by default"
> + depends on MMC && BLOCK
default y
The reason being: I want it to be tested, I want it to be deployed.
We should rather use it as a fallback option if something turns out
to be problematic with MQ which, at this point, is highly unlikely.
> +++ b/include/linux/mmc/host.h
> @@ -380,6 +380,7 @@ struct mmc_host {
> unsigned int doing_retune:1; /* re-tuning in progress */
> unsigned int retune_now:1; /* do re-tuning at next req */
> unsigned int retune_paused:1; /* re-tuning is temporarily disabled */
> + unsigned int use_blk_mq:1; /* use blk-mq */
unsigned int foo:1 is really a weird way of saying "bool".
We should just fix it I guess, but it's another patch.
Yours,
Linus Walleij
