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Re: [PATCHSET cgroup/for-4.6] cgroup: update migration destination cgroup handling

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  Re: [PATCHSET cgroup/for-4.6] cgroup: update migration destination  cgroup handling Tejun Heo <tj@kernel.org> - 2016-03-08 18:00 +0100

#1353217 — Re: [PATCHSET cgroup/for-4.6] cgroup: update migration destination cgroup handling

On Thu, Mar 03, 2016 at 12:19:58PM -0500, Tejun Heo wrote:
> cgroup migrations used to always be single destination.  There could
> be multiple sources but there was only one destination cgroup.  This
> changed with default hierarchy as enabling a controller would move
> processes in child cgroups into separate csses.  This was developed
> over time and is working correctly now but the way multiple
> destinations are handled is hacky and fragile.  This patchset updates
> migration logic so that multi-destination handling is integral.
> 
> This patchset contains the following four patches.
> 
>  0001-cgroup-fix-incorrect-destination-cgroup-in-cgroup_up.patch
>  0002-cgroup-move-migration-destination-verification-out-o.patch
>  0003-cgroup-make-cgroup-_taskset-_migrate-take-cgroup_roo.patch
>  0004-cgroup-use-css_set-mg_dst_cgrp-for-the-migration-tar.patch

These changes are mostly mechanical and I want them to be in for-4.6
for a while before the merge window opens up.  Applying to
cgroup/for-4.6.  In the unlikely case that this breaks something,
let's fix with followup patches.

Thanks.

-- 
tejun

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