Messages in this thread | | | Subject | Re: 2.6.28 has unconfigurable group sched? | From | Peter Zijlstra <> | Date | Thu, 15 Jan 2009 08:29:04 +0100 |
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On Wed, 2009-01-14 at 06:46 -0800, Mark Glines wrote: > Peter Zijlstra wrote: > >> So it seems rt_schedulable() is never succeeding. Any ideas? > > > > Yeah, I should test this user grouping stuff more often :/ > > > > The below fixes it for me. > > --- > > Subject: sched: fix bandwidth validation for UID grouping > > > > For UID grouping we initialize the root group with infinite bandwidth > > which by default is actually more than the global limit, therefore the > > bandwidth check always fails. > > > > Because the root group is a phantom group (for UID grouping) we cannot > > runtime adjust it, therefore we let it reflect the global bandwidth > > settings. > > > Thanks. Sadly, this doesn't seem to change anything for me. I applied > it to 2.6.28, rebuilt and reinstalled, and got the same result. I did a > clean rebuild to be sure; and got the same behavior again. > > Please let me know if there are any additional diagnostics I can provide.
Most strange, I did the patch on .28 just to be sure (my initial testing was done on -linus since I couldn't remember it having changed in a while), and it still works for me.
CONFIG_GROUP_SCHED=y CONFIG_FAIR_GROUP_SCHED=y CONFIG_RT_GROUP_SCHED=y CONFIG_USER_SCHED=y # CONFIG_CGROUP_SCHED is not set
Linux opteron 2.6.28 #634 SMP PREEMPT Wed Jan 14 18:13:31 CET 2009 x86_64 x86_64 x86_64 GNU/Linux
# echo 450000 > /sys/kernel/uids/0/cpu_rt_runtime # cat /sys/kernel/uids/0/cpu_rt_runtime 450000
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