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 > > > AlexanderHi , 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