> Il giorno 17 ago 2018, alle ore 19:31, Ricardo Ribalda Delgado <ricardo.ribalda@xxxxxxxxx> 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
