Starting to work on this SRU I figures out that this kernel config option is
already enabled.
I checked the config file that is created at kernel build time as well as the
master-next trees of focal and groovy - and CONFIG_FUNCTION_PROFILER is enabled
for all architectures, incl. ppc64el:
$ lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 20.04.1 LTS
Release: 20.04
Codename: focal
$ uname -r
5.4.0-44-generic
$ grep CONFIG_FUNCTION_PROFILER /boot/config-$(uname -r)
CONFIG_FUNCTION_PROFILER=y
$ lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu Groovy Gorilla (development branch)
Release: 20.10
Codename: groovy
$ uname -r
5.4.0-42-generic
$ grep CONFIG_FUNCTION_PROFILER /boot/config-$(uname -r)
CONFIG_FUNCTION_PROFILER=y
$ lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu Groovy Gorilla (development branch)
Release: 20.10
Codename: groovy
$ uname -r
5.8.0-16-generic
<proposed kernel>
$ grep CONFIG_FUNCTION_PROFILER /boot/config-$(uname -r)
CONFIG_FUNCTION_PROFILER=y
user@box:~/ubuntu-focal-master-next/debian.master/config$ grep -R
CONFIG_FUNCTION_PROFILER *
annotations:CONFIG_FUNCTION_PROFILER policy<{'amd64':
'y', 'arm64': 'y', 'armhf': 'y', 'i386': 'y', 'ppc64el': 'y', 's390x': 'y'}>
config.common.ubuntu:CONFIG_FUNCTION_PROFILER=y
user@box:~/ubuntu-groovy-master-next/debian.master/config$ grep -R
CONFIG_FUNCTION_PROFILER *
annotations:CONFIG_FUNCTION_PROFILER policy<{'amd64':
'y', 'arm64': 'y', 'armhf': 'y', 'ppc64el': 'y', 's390x': 'y'}>
config.common.ubuntu:CONFIG_FUNCTION_PROFILER=y
Is CONFIG_FUNCTION_PROFILER the only option you were looking for, or is/are
there other options needed or is it not working for you (even if set)?
Otherwise I would say there is nothing to do, since it's already configured
like requested.
** Changed in: ubuntu-power-systems
Status: New => Incomplete
** Changed in: linux (Ubuntu Focal)
Status: New => Incomplete
** Changed in: linux (Ubuntu Groovy)
Status: New => Incomplete
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https://bugs.launchpad.net/bugs/1887986
Title:
Enable FUNCTION_PROFILER kernel config option for ppc64le
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