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
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
Public bug reported:
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 /sys/block/vda/queue/nr_requests
-bash: echo: write error: Invalid argument
However values lower then
apport information
** Attachment added: Lspci.txt
https://bugs.launchpad.net/bugs/1436319/+attachment/4355575/+files/Lspci.txt
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apport information
** Attachment added: UdevLog.txt
https://bugs.launchpad.net/bugs/1436319/+attachment/4355580/+files/UdevLog.txt
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apport information
** Attachment added: ProcModules.txt
https://bugs.launchpad.net/bugs/1436319/+attachment/4355578/+files/ProcModules.txt
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apport information
** Attachment added: ProcCpuinfo.txt
https://bugs.launchpad.net/bugs/1436319/+attachment/4355576/+files/ProcCpuinfo.txt
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apport information
** Attachment added: UdevDb.txt
https://bugs.launchpad.net/bugs/1436319/+attachment/4355579/+files/UdevDb.txt
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apport information
** Attachment added: CurrentDmesg.txt
https://bugs.launchpad.net/bugs/1436319/+attachment/4355574/+files/CurrentDmesg.txt
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apport information
** Attachment added: ProcInterrupts.txt
https://bugs.launchpad.net/bugs/1436319/+attachment/4355577/+files/ProcInterrupts.txt
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apport information
** Attachment added: CRDA.txt
https://bugs.launchpad.net/bugs/1436319/+attachment/4355573/+files/CRDA.txt
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apport information
** Attachment added: WifiSyslog.txt
https://bugs.launchpad.net/bugs/1436319/+attachment/4355581/+files/WifiSyslog.txt
** Changed in: linux (Ubuntu)
Status: Incomplete = Confirmed
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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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