[dm-devel] [PATCH V3 0/5] dm-rq: improve sequential I/O performance

[Bart Van Assche]

On Fri, 2018-01-12 at 12:18 -0500, Mike Snitzer wrote:
> This is going upstream for 4.16:
> https://git.kernel.org/pub/scm/linux/kernel/git/snitzer/linux.git/commit/?h=dm-4.16&id=5b18cff4baedde77e0d69bd62a13ae78f9488d89

That is really gross. I have explained many times in detail on the dm-devel
list why that blk_mq_delay_run_hw_queue() call is necessary. So I think it is
wrong if you remove it. Isn't the responsibility of you as the device mapper
kernel maintainer to avoid regressions instead of introducing regressions?

Bart.