> Il giorno 17 ago 2018, alle ore 19:31, Ricardo Ribalda Delgado
> <[email protected]> ha scritto:
>
> Hello
>
> Coming from: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=906328
>
> bmaptools is kind of a "smart dd" tool, that lets you write images
> very fast and securely. Since the last Debian Kernel update it has
> become 5-8 times slower.
>
> After some debugging, we have figured out that the reason for that
> slowness is the Multi-Queue Block IO Queueing Mechanism.
>
> Debian maintainer has pointed out that in the near future the single
> queue will be deprecated.
>
> My question is if we can get a similar perfomance for bmaptools with
> blk-mq and how?
>
Have you also checked what happens after switching to a different I/O
scheduler for the involved drive (among none, mq-deadline, bfq and
kyber)?
Paolo
> Thanks!
>
> --
> Ricardo Ribalda
