Hi there,
Is there an update with this bug?
I am hitting it, or something very similar with 16.04 on EC2 with Xen
EBS volumes.
root@ip-10-124-125-119:~# cat /etc/lsb-release
DISTRIB_ID=Ubuntu
DISTRIB_RELEASE=16.04
DISTRIB_CODENAME=xenial
DISTRIB_DESCRIPTION="Ubuntu 16.04.1 LTS"
admin@test:~$ uname -a
Linux test 4.1.0-040100rc6-lowlatency #201506010235 SMP PREEMPT Mon Jun 1
02:39:09 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux
root@test:/home/admin# echo 129 /sys/block/vda/queue/nr_requests
bash: echo: write error: Invalid argument
root@test:/home/admin# cat
The v4.1-rc6 upstream kernel is now available. Can you test that kernel and
see if this bug still exists? It can be downloaded from:
http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.1-rc6-unstable/
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apport information
** Tags added: apport-collected ec2-images trusty
** Description changed:
Anyone know why ubuntu utopic/trusty doesn’t allow to change nr_requests
and I/O scheduler for instance that is running on the cloud running
openstack havana?
echo 129
Would it be possible for you to test the latest upstream kernel? Refer
to https://wiki.ubuntu.com/KernelMainlineBuilds . Please test the latest
v4.0 kernel[0].
If this bug is fixed in the mainline kernel, please add the following
tag 'kernel-fixed-upstream'.
If the mainline kernel does not fix
echo 129 /sys/block/vda/queue/nr_requests
bash: echo: write error: Invalid argument
** Summary changed:
- Unable to increase nr_requests...
+ Unable to increase nr_requests Change The I/O Scheduler ...
** Summary changed:
- Unable to increase nr_requests Change The I/O Scheduler ...
+
uname -a
Linux test 4.0.0-04rc5-generic #201503230035 SMP Mon Mar 23 04:36:26 UTC
2015 x86_64 x86_64 x86_64 GNU/Linux
cat /sys/block/vda/queue/scheduler
none
** Tags added: kernel-bug-exists-upstream
** Changed in: linux (Ubuntu)
Status: Incomplete = Confirmed
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