CentOS - Jul 2020 - disk on vm with kvm

hi list, i am trying to change the input and output scheduler on my
disks, and it does not allow me ,
I have several virtualized vm over kvm, and when I try to make the
change it shows me this message:

echo "noop" > /sys/block/vda/queue/scheduler

-bash: echo: write error: Invalid argument

kernel version:

3.10.0-1127.13.1.el7.x86_64

any idea?



-- 
rickygm

http://gnuforever.homelinux.com

Am 03.07.2020 um 18:54 schrieb Rick Gutierrez:
> hi list, i am trying to change the input and output scheduler on my
> disks, and it does not allow me ,
> I have several virtualized vm over kvm, and when I try to make the
> change it shows me this message:
> 
> echo "noop" > /sys/block/vda/queue/scheduler
> 
> -bash: echo: write error: Invalid argument
> 
> kernel version:
> 
> 3.10.0-1127.13.1.el7.x86_64
> 
> any idea?
I would guess that the scheduler "noop" isn't available, thus that
specific error message.

On my physical Server CentOS 7 with latest kernel:

# cat /sys/block/nvme0n1/queue/scheduler
[none] mq-deadline kyber

The KVM VM on that host, too CentOS 7 with latest kernel:

# cat /sys/block/vda/queue/scheduler
[mq-deadline] kyber none


Alexander

El vie., 3 jul. 2020 a las 11:05, Alexander Dalloz
(<ad+lists at uni-x.org>) escribi?:
>
>
> I would guess that the scheduler "noop" isn't available, thus
that
> specific error message.
>
> On my physical Server CentOS 7 with latest kernel:
>
> # cat /sys/block/nvme0n1/queue/scheduler
> [none] mq-deadline kyber
>
> The KVM VM on that host, too CentOS 7 with latest kernel:
>
> # cat /sys/block/vda/queue/scheduler
> [mq-deadline] kyber none
>
>
> Alexander
Hi , It is strange, in previous versions of this kernel I have it
available, in an environment with vmware vsphere 6.

any modifications in this kernel that did not include it?

-- 
rickygm

http://gnuforever.homelinux.com