any news ?
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https://bugs.launchpad.net/bugs/1346687
Title:
Ubuntu 14 KVM Guest I/O Elevator Non-configurable
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I hate to reopen an old bug, but I haven't seen this discussed anywhere
else, and I think there is some validity in this.
Without the use of the cfq scheduler on block devices (virtual or not),
the blkio cgroup controller doesn't perform any IO accounting (see
below).
Without that, tools like
** Package changed: util-linux (Ubuntu) = linux (Ubuntu)
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https://bugs.launchpad.net/bugs/1346687
Title:
Ubuntu 14 KVM Guest I/O Elevator Non-configurable
To manage notifications
This is a change in the kernel between 3.13 and 3.13-rc1. It also
persists in the most recent kernel version. I believe this is still an
invalid bug as what benefit would setting an I/O scheduler to anything
be if the device is virtual? On a physical machine you are still able to
set the I/O
As suggested, I added the package for /bin/lsblk. That is probably good
enough for initial bug report.
Dusan Baljevic
** Package changed: ubuntu = util-linux (Ubuntu)
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Your other distributions are running older kernels. This behavior was
changed in the kernel because it does not make sense to run an elevator
on virtual devices. You will notice the same thing on bare metal for
lvm and raid: they no longer have their own elevator. Instead the IO is
passed
** Tags added: trusty
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https://bugs.launchpad.net/bugs/1346687
Title:
Ubuntu 14 KVM Guest I/O Elevator Non-configurable
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Thank you for the update. I am then not sure why it is also wrong in
CentOS 7 guest. The inconsistency with other Linux distributions is what
I am concerned about...
# uname -a
Linux centos7-vm2 3.10.0-123.4.2.el7.x86_64 #1 SMP
Mon Jun 30 16:09:14 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux
# cat
Thank you for taking the time to report this bug and helping to make
Ubuntu better. It seems that your bug report is not filed about a
specific source package though, rather it is just filed against Ubuntu
in general. It is important that bug reports be filed about source
packages so that people
