Kernel for MIDI/audio production

[Ralf Mardorf]

Hi,

for MIDI/audio production I need a real-time kernel. With Ubuntu Quantal  the 
last kernel I used was 3.6.5-rt14, with Arch Linux the last kernel I used was 
3.8.13-rt14. With Ubuntu Quantal and Arch Linux 3.8.10-rt kernels didn't work, 
so for Kubuntu Saucy I started installing the lowlatency from the official 
repositories and then I build the kernels, 3.6.5-rt14 and 3.8.13-rt14 with the 
configs that are known to work on my machine. Those three kernels do work with 
Saucy too.

Then I build the current kernel-rt, 3.12.1-rt4, using the 3.6.5-rt14 config 
from Quantal that does work and run oldconfig to set up the new options.

I build three different versions of 3.12.1-rt4. 3.12.1-rt4-idle is what is 
recommended, 3.12.1-rt4-nohz and 3.12.1-rt4 are the additional configs I tested 
until now [1].

Any hints, what's worse testing too, are welcome.

Does a kernel-rt >= 3.10-rt work for somebody on this list?

Regards,
Ralf

[1]
rocketmouse at saucy:/boot$ ls -hAl conf*
-rw-r--r-- 1 root root 160K Okt 29 17:41 config-3.11.0-13-lowlatency
-rw-r--r-- 1 root root 139K Nov 26 11:27 config-3.12.1-rt4
-rw-r--r-- 1 root root 139K Nov 27 08:07 config-3.12.1-rt4-idle
-rw-r--r-- 1 root root 139K Nov 26 23:11 config-3.12.1-rt4-nohz
-rw-r--r-- 1 root root 132K Nov 26 02:05 config-3.6.5-rt14
-rw-r--r-- 1 root root 131K Nov 26 04:22 config-3.8.13-rt14-1-rt
rocketmouse at saucy:/boot$ grep NO_HZ c*3.11*
CONFIG_NO_HZ_COMMON=y
CONFIG_NO_HZ_IDLE=y
# CONFIG_NO_HZ_FULL is not set
CONFIG_NO_HZ=y
CONFIG_RCU_FAST_NO_HZ=y
rocketmouse at saucy:/boot$ grep NO_HZ c*3.6*
CONFIG_NO_HZ=y
rocketmouse at saucy:/boot$ grep NO_HZ c*3.8*
CONFIG_NO_HZ=y
rocketmouse at saucy:/boot$ grep NO_HZ c*3.12*rt4
CONFIG_NO_HZ_COMMON=y
# CONFIG_NO_HZ_IDLE is not set
CONFIG_NO_HZ_FULL=y
CONFIG_NO_HZ_FULL_ALL=y
CONFIG_NO_HZ_FULL_SYSIDLE=y
CONFIG_NO_HZ_FULL_SYSIDLE_SMALL=2
CONFIG_NO_HZ=y
rocketmouse at saucy:/boot$ grep NO_HZ c*3.12*rt4-idle
CONFIG_NO_HZ_COMMON=y
CONFIG_NO_HZ_IDLE=y
# CONFIG_NO_HZ_FULL is not set
CONFIG_NO_HZ=y
rocketmouse at saucy:/boot$ grep NO_HZ c*3.12*rt4-nohz
# CONFIG_NO_HZ_IDLE is not set
# CONFIG_NO_HZ_FULL is not set
CONFIG_NO_HZ=y
rocketmouse at saucy:/boot$