[KERNEL] This is the official update thread for XU3/XU4

by **mdrjr** » Tue Aug 05, 2014 10:34 pm

Please post here requests for features / modules on XU3/XU4 kernel.

Track changes here -> https://github.com/hardkernel/linux/tre ... xu3-3.10.y

by **meveric** » Wed Aug 06, 2014 6:34 pm

any particular reason, why joydev is deactivated again?

by **memeka** » Wed Aug 06, 2014 9:04 pm

or HID_APPLE?

)
I had to hack my keyboard and mouse in again

by **mdrjr** » Wed Aug 06, 2014 11:24 pm

https://github.com/hardkernel/linux/com ... 84c3d59842
https://github.com/hardkernel/linux/com ... e408a1fc95

Its live on ODROID Utility

by **roosemberth** » Sat Aug 30, 2014 12:43 am

can you enable CONFIG_TASKSTATS, CONFIG_TASK_DELAY_ACCT, CONFIG_TASK_IO_ACCOUNTING for iotop?

by **mdrjr** » Sat Aug 30, 2014 3:20 am

Done

Building it.

by **Hominidae** » Tue Sep 16, 2014 7:31 am

Hi,

I am trying to get lxc-docker up&running on my XU3.
It appears there are some kernel configs not set, that are needed. (installed docker.io, but running a container failed).

Note:
I tried to create a new config based on the odroidxu3_defconfig supplied with the git trunk, but it also appears that in this config
the entry for User-Namespace "CONFIG_USER_NS" is completely missing (not part of the odroidxu3_defconfig at all, so using menuconfig to enable it will fail.).

This is what is needed, based on lxc-checkconfig (install lxc userland tools):

Code: Select all: root@odroid:~/odroidxu3-3.10.y# lxc-checkconfig --- Namespaces --- Namespaces: enabled Utsname namespace: enabled Ipc namespace: enabled Pid namespace: enabled User namespace: missing Network namespace: enabled Multiple /dev/pts instances: missing --- Control groups --- Cgroup: enabled Cgroup clone_children flag: enabled Cgroup device: missing Cgroup sched: enabled Cgroup cpu account: enabled Cgroup memory controller: missing Cgroup cpuset: missing --- Misc --- Veth pair device: enabled Macvlan: enabled Vlan: enabled File capabilities: enabled Note : Before booting a new kernel, you can check its configuration usage : CONFIG=/path/to/config /usr/bin/lxc-checkconfig root@odroid:~/odroidxu3-3.10.y#

...and here's the config diff

Code: Select all: root@odroid:~/odroidxu3-3.10.y# diff ./arch/arm/configs/odroidxu3_defconfig ./arch/arm/configs/odroidxu3_defconfig.old 112,114c112,113 < CONFIG_CGROUP_DEVICE=y < CONFIG_CPUSETS=y < CONFIG_PROC_PID_CPUSET=y --- > # CONFIG_CGROUP_DEVICE is not set > # CONFIG_CPUSETS is not set 117,118c116 < CONFIG_MEMCG=y < # CONFIG_MEMCG_KMEM is not set --- > # CONFIG_MEMCG is not set 124,125c122 < CONFIG_BLK_CGROUP=y < # CONFIG_DEBUG_BLK_CGROUP is not set --- > # CONFIG_BLK_CGROUP is not set 129d125 < CONFIG_USER_NS=y 134d129 < CONFIG_MM_OWNER=y 229d223 < # CONFIG_BLK_DEV_THROTTLING is not set 259d252 < # CONFIG_CFQ_GROUP_IOSCHED is not set 1744c1737 < CONFIG_DEVPTS_MULTIPLE_INSTANCES=y --- > # CONFIG_DEVPTS_MULTIPLE_INSTANCES is not set root@odroid:~/odroidxu3-3.10.y#

...the little box is now compiling the kernel...will see what comes out of that when I get up.

Edit:
nope, I can't get the CONFIG_USER_NS=y entry to stick with the config. Some dependencies are beyond my skills (last time I worked with linux kernels was in v0.9 and I am balding fast

)
I really could use some help with this ...AFAIU something in the odroidxu3_defconfig is wrong, so menuconfig will not set this element at all.

Edit-2: OK, found a hint somewhere in a Slack forum..somethings wrong with config dependencies in kernel 3.10.y ....aparently, when you de-select the XFS filesystem, the User-Namespace element re-appears

....got a .config now...re-compiling

by **Hominidae** » Tue Sep 16, 2014 6:16 pm

OK, when setting LXC required configs, the CONFIG_USER_NS=y breaks the kernel.
It won't compile:

Code: Select all: kernel/sched/core.c: In function ‘cpu_cgroup_allow_attach’: kernel/sched/core.c:7771:18: error: invalid operands to binary != (have ‘kuid_t’ and ‘kuid_t’) cred->euid != tcred->uid && cred->euid != tcred->suid) ^ kernel/sched/core.c:7771:46: error: invalid operands to binary != (have ‘kuid_t’ and ‘kuid_t’) cred->euid != tcred->uid && cred->euid != tcred->suid) ^

..any chance to go to more upstream kernel, like the "true/actual" one from trusty (LXC is working in there, at least for amd64) ?

by **mdrjr** » Tue Sep 16, 2014 7:25 pm

No. Upstream kernel doesn't boot a few of the 8-cores, doesn't have HMP scheduler.

I'll see what's wrong..

by **Hominidae** » Tue Sep 16, 2014 7:53 pm

...your help is very much appreciated, thanks!

Here's a close hint that it indeed should work: http://blog.tutum.co/2013/12/14/enablin ... -10-saucy/

by **mdrjr** » Tue Sep 16, 2014 8:00 pm

I already found the issues

Just checking if I won't break anything with it.

by **mdrjr** » Tue Sep 16, 2014 8:13 pm

Its fixed. Download the sources again.

by **Hominidae** » Tue Sep 16, 2014 8:57 pm

.....wow...that was blazing fast!

I configured the kernel for lxc-docker and it did indeed build

...need to run some tests and report back

Thanks again for your excellent support!

by **Hominidae** » Tue Sep 23, 2014 4:45 pm

Hi mdrjr,

I have successfully installed/used docker.
Can you permanently enable the configs explained here viewtopic.php?f=98&t=6638#p52786
in order to support the use of docker for ubuntu hosts, based on your kernel and without having the users to build their own?

TIA,
hominidae

by **mdrjr** » Wed Sep 24, 2014 2:32 am

Can you send me a PR or the list of the CONFIG_ symbols ?

by **Hominidae** » Wed Sep 24, 2014 8:25 pm

...yes, will do....asap, as I am currently traveling with no access to my systems.

by **MastaG** » Mon Oct 06, 2014 6:30 am

Would CONFIG_SWAP=y be possible?

by **mdrjr** » Mon Oct 06, 2014 6:44 pm

MastaG wrote:Would CONFIG_SWAP=y be possible?

Yes.. I'll add that tomorrow

by **cnaumer** » Tue Oct 07, 2014 5:08 am

Is there a reason that the ondemand governor is not in the kernel? I have a xu3 and would like to use it for a low power application. Or would there be a problem with the HMP scheduler?

Regards

by **mdrjr** » Tue Oct 07, 2014 10:48 am

cnaumer wrote:Is there a reason that the ondemand governor is not in the kernel? I have a xu3 and would like to use it for a low power application. Or would there be a problem with the HMP scheduler?

Regards

There's a problem right now with ondemand and hmp/cpu qos.. So its impossible right now..
But even with ondemand the power comsumption won't be much lower.

by **recliq** » Mon Oct 13, 2014 11:03 pm

Please enable uinput in kernel.
I tried to get sixad working on XU3 (for Sony DS3 Pad) and it requires uinput module, after compiling it myself everything now works.

by **mdrjr** » Mon Oct 13, 2014 11:06 pm

Android or Ubuntu ?

by **recliq** » Tue Oct 14, 2014 12:29 am

oh, sorry forgot to mention that, ubuntu please

by **recliq** » Thu Oct 23, 2014 8:47 pm

I see there's a new kernel for XU3, still no uinput module though... :/

by **mdrjr** » Thu Oct 23, 2014 11:50 pm

Oh kill me

I'm really sorry.. I've forgot that

Can you ping me in 3 days? I'll add for you

Right now I'm waiting to board for my flight back to Brazil

by **recliq** » Fri Oct 24, 2014 12:23 am

No need to hurry, not that important, don't worry. I can just compile it myself for now..

Just would be nice to have it in future kernel versions.

by **Hominidae** » Fri Oct 24, 2014 4:17 am

Hominidae wrote:Hi mdrjr,

I have successfully installed/used docker.
Can you permanently enable the configs explained here viewtopic.php?f=98&t=6638#p52786
in order to support the use of docker for ubuntu hosts, based on your kernel and without having the users to build their own?

TIA,
hominidae

mdrjr wrote:Can you send me a PR or the list of the CONFIG_ symbols ?

...bump!
I did send you a PM with the symbols some weeks ago...don't know if you have found the time but if I interpret the commits on git correctly, you did not.

...about to try the updated Ubuntu with XBMC soon

it would simply be great to have Docker on this too....

by **mdrjr** » Sat Oct 25, 2014 10:30 pm

My fear here is to disable XFS and someone is using it

I'll break this person boot

I need more time to check if there's any patch that enables both to be built together

by **Hominidae** » Sun Oct 26, 2014 2:25 am

Ah, right!

...in fact the ARCH image comes without xfs module indeed.

by **thepotter** » Mon Nov 03, 2014 6:19 am

mdrjr wrote:
cnaumer wrote:Is there a reason that the ondemand governor is not in the kernel? I have a xu3 and would like to use it for a low power application. Or would there be a problem with the HMP scheduler?

Regards

There's a problem right now with ondemand and hmp/cpu qos.. So its impossible right now..
But even with ondemand the power comsumption won't be much lower.

So, is there no way to change a frequency?

by **mdrjr** » Mon Nov 03, 2014 6:28 am

Sigh.....

(for A7)
echo frequency_in_kHz > /sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq

(for A15)
echo frequency_in_kHz > /sys/devices/system/cpu/cpu4/cpufreq/scaling_max_freq

by **thepotter** » Mon Nov 03, 2014 7:20 am

Thanks, mdrjr.

One more question is that [scaling_available_governors] returns only "performance". In my Ubuntu machine, it returns "ondemand conservative powersave userspace performance". Do you know how to change governor? Do we need to install another OS? Sorry that I have lack of background of governor.

by **mdrjr** » Mon Nov 03, 2014 9:40 am

Only performance is working....

by **dony** » Fri Nov 07, 2014 11:12 am

So do I have to use only performance?
I need make a experiment with using ondemand, powersave, governer.....
How can I do it?

by **mdrjr** » Fri Nov 07, 2014 11:36 am

You go ahead and fix the devfreq so it works.

by **dony** » Fri Nov 07, 2014 11:46 am

um.... I tried and I checked the available_freq_governor.... that was only performance...

How can I change the governor to powersave or interactive???

by **mdrjr** » Fri Nov 07, 2014 11:50 am

Rebuild the kernel with supports for it.
Btw, this is not the thread for this discussion.

by **dony** » Fri Nov 07, 2014 12:01 pm

As I know, the kernel which hardkernel provided doesnt include another governor code....
and that is only the kernel to support HMP scheduling on XU3...isnt it?

Do you mean I am supposed to rebuild the kernel code with modifying configuration to use another governor ?
thats all?

by **memeka** » Fri Nov 07, 2014 12:06 pm

yes you can select additional governors in the kernel configuration.
the problem is currently on the xu3 only performance works well - that's why the others aren't enabled in the default config.

by **dony** » Fri Nov 07, 2014 3:01 pm

One more thing..
could you let me know why the other governor has problem to work on JUST Xu3 even though many os is using interactive or ondemand typically?
what is the main problem???? cuz of XU3's hardware characteristics?

by **mdrjr** » Fri Nov 07, 2014 3:04 pm

HMP Scheduler.

by **hamish** » Thu Nov 20, 2014 10:24 pm

hi

can the SCSI driver be activated, e.g. to enable connecting a USB CDROM?

currently (in 14.04 as supplied with an XU3) the config file has:

# CONFIG_BLK_DEV_SR is not set

https://raw.githubusercontent.com/hardk ... _defconfig

so I'm not getting /dev/sr0 for example...

thanks!

h

by **meveric** » Fri Nov 21, 2014 4:04 am

i've just build a kernel with CDROM support and tested it with XBMC works perfectly fine. You can download it from my repository if you don't want to wait.

by **mdrjr** » Fri Nov 21, 2014 10:54 am

Done, should be live in 30minutes.

by **hamish** » Fri Nov 21, 2014 6:46 pm

SCSI USB CDROM working now, thanks for the quick fix!
h

by **wombat** » Wed Dec 03, 2014 8:21 am

Please enable POSIX_MQUEUE in the default configs, as without it, NILFS2 cleaner daemon won't start.

by **mdrjr** » Thu Dec 04, 2014 5:03 am

wombat wrote:Please enable POSIX_MQUEUE in the default configs, as without it, NILFS2 cleaner daemon won't start.

Added

by **otherush** » Thu Dec 18, 2014 5:31 am

I saw earlier in the thread you added uinput support for ubuntu. Can you also add this for android? DroidMote depends on this

by **odroid** » Thu Dec 18, 2014 10:57 am

otherush wrote:I saw earlier in the thread you added uinput support for ubuntu. Can you also add this for android? DroidMote depends on this

"uinput" included Android image will be released soon.

by **otherush** » Thu Dec 18, 2014 11:27 am

Fantastic! Thank you so much