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Thread: BFQ Scheduler Will Try To Go Mainline In The Linux Kernel

  1. #1
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    Default BFQ Scheduler Will Try To Go Mainline In The Linux Kernel

    Phoronix: BFQ Scheduler Will Try To Go Mainline In The Linux Kernel

    The developers behind the BFQ I/O scheduler are preparing patches to try to mainline the scheduler within the upstream Linux kernel...

    http://www.phoronix.com/vr.php?view=MTYyNDU

  2. #2
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    I find this scheduler meaningless after I started using xfs on my system partitions and when kernel 3.13 brought the io queuing layer.

  3. #3
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    Quote Originally Posted by roberth View Post
    I find this scheduler meaningless after I started using xfs on my system partitions and when kernel 3.13 brought the io queuing layer.
    Maybe you should check the benchmarks on 3.13 http://algo.ing.unimo.it/people/paol...ed/results.php

  4. #4
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    Quote Originally Posted by AnAkIn View Post
    Maybe you should check the benchmarks on 3.13 http://algo.ing.unimo.it/people/paol...ed/results.php
    I use an ssd for system partitions, and the benchmark shows no gain with bfq and ssds AFAICT.

  5. #5
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    Quote Originally Posted by roberth View Post
    I find this scheduler meaningless after I started using xfs on my system partitions and when kernel 3.13 brought the io queuing layer.
    What's this new io queuing layer? Link please?
    Thanks!

  6. #6
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    Quote Originally Posted by kokoko3k View Post
    What's this new io queuing layer? Link please?
    Thanks!
    *Multi-Queue Block Layer

    http://www.phoronix.com/scan.php?pag...tem&px=MTUxNDQ

  7. #7
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    Thank you.

  8. #8
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    Quote Originally Posted by roberth View Post
    I use an ssd for system partitions, and the benchmark shows no gain with bfq and ssds AFAICT.
    Look again, it does for startup times.

  9. #9
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    Finally a usable, low-latency I/O scheduler for linux. I hope the kernel developers get this merged ASAP.

  10. #10
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    Quote Originally Posted by AnAkIn View Post
    Look again, it does for startup times.
    What surprises me is that from my experience BFQ makes the boot up take longer. I tested this on my system with SSD and checked the startup time with systemd-analyze with and without "elevator=bfq" as kernel line parameter. Takes a good second longer to boot.

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