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For better integration with VDSM tuned should add a rule to udev or periodically poll it for new devices and change their I/O scheduler according to the current profile.

currently to achieve this we need to change the scheduler in our own code (what happens) or ask tuned to reconfigure (creating unwanted awareness of the tuned package in code)

Hello,

I would phrase that differently.

Operating system is dynamic by nature. Performing tuning at specific point in time can be true for this point in time but this point only.

Doing so at one point in time does not require any daemon to run, as it can do any required tuning and exit.

What I expect is to see a daemon tuning the system when changed based on selected profile, this by [at least] listening to udev events.

I recommend avoiding a [simple] poll loop (even once per minute) as it consume unneeded power and does not meet with the "tune" task.

Thank you,
Alon Bar-Lev.

This request was not resolved in time for the current release.
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AFAIK this is fixed in RHEL-6.4 (tuned-0.2.19-11.el6_4.1 and up) - ktune is restarted by the udev rule when the new block device is added to the system.

Feel free to reopen this bug / comment here if it doesn't resolve the problem for you.