[libvirt] [PATCH 0/3] several cgroups/cpuset fixes

[John Ferlan]

On 11/13/2015 11:56 AM, Henning Schild wrote:
> Hi,
> 
> i already explained some of the cgroup problems in some detail so i
> will not do that again.
> https://www.redhat.com/archives/libvir-list/2015-October/msg00876.html
> 
> I managed to solve some of the problems in the current codebase, and
> am now sharing the patches. But they are really just half of what i 
> had to change to get libvirt to behave in a system with isolated cpus.
> 
> Other changes/hacks i am not sending here because they do not work for
> the general case:
> - create machine.slice before starting libvirtd (smaller than root)
>   ... and hope it wont grow
> - disabling cpuset.cpus inheritance in libvirtd
> - allowing only xml with fully specified cputune
> - set machine cpuset to (vcpupins | emulatorpin)
> 
> I am not sure how useful the individual fixes are, i am sending them
> as concrete examples for the problems i described earlier. And i am
> hoping that will start a discussion.
> 
> Henning
> 
> Henning Schild (3):
>   util: cgroups do not implicitly add task to new machine cgroup
>   qemu: do not put a task into machine cgroup
>   qemu cgroups: move new threads to new cgroup after cpuset is set up
> 
>  src/lxc/lxc_cgroup.c   |  6 ++++++
>  src/qemu/qemu_cgroup.c | 23 ++++++++++++++---------
>  src/util/vircgroup.c   | 22 ----------------------
>  3 files changed, 20 insertions(+), 31 deletions(-)
> 


The updated code looks fine to me - although it didn't directly git am
-3 to top of tree - I was able to make a few adjustments to get things
merged...  Since no one has objected to this ordering change - I've pushed.

Tks -

John