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Re: [PATCHv1 3/6] rdmacg: implements rdma cgroup

From Tejun Heo <tj@kernel.org>
Newsgroups linux.kernel
Subject Re: [PATCHv1 3/6] rdmacg: implements rdma cgroup
Date 2016-01-07 21:30 +0100
Message-ID <qOpm4-4Jn-29@gated-at.bofh.it> (permalink)
References (1 earlier) <qNF9x-77Z-35@gated-at.bofh.it> <qNHXI-yS-11@gated-at.bofh.it> <qO5Ql-7Zi-5@gated-at.bofh.it> <qOkFJ-1wu-47@gated-at.bofh.it> <qOpm4-4Jn-27@gated-at.bofh.it>
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Hello, Parav.

On Fri, Jan 08, 2016 at 01:55:09AM +0530, Parav Pandit wrote:
...
> Above functionality is achieved, by maintaining the map this tgid and
> associated original cgroup at try_charge(), uncharge() time.

Hmmm, what happens after the following?

1. A process allocates some rdma resources and get registered on the
   hash table.

2. The process gets migrated to a different cgroup.

3. The process allocates more rdma resources.

Which cgroup would the resources from #3 be attributed to?

> In alternate method,
> Its simple to store the pointer of rdma_cgroup structure in the IB
> resource structure and hold on reference count to rdma_cgroup.
> so that when its freed, uncharge_resource can accept rdma_cgroup
> structure pointer.

That'd be a lot more in line with how other controllers behave.

Thanks.

-- 
tejun

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Thread

[PATCHv1 0/6] rdma controller support Parav Pandit <pandit.parav@gmail.com> - 2016-01-05 20:00 +0100
  [PATCHv1 4/6] IB/core: rdmacg support infrastructure APIs Parav Pandit <pandit.parav@gmail.com> - 2016-01-05 20:10 +0100
  [PATCHv1 5/6] IB/core: use rdma cgroup for resource accounting Parav Pandit <pandit.parav@gmail.com> - 2016-01-05 20:10 +0100
  [PATCHv1 2/6] IB/core: Added members to support rdma cgroup Parav Pandit <pandit.parav@gmail.com> - 2016-01-05 20:10 +0100
    Re: [PATCHv1 2/6] IB/core: Added members to support rdma cgroup Tejun Heo <tj@kernel.org> - 2016-01-05 23:00 +0100
      Re: [PATCHv1 2/6] IB/core: Added members to support rdma cgroup Parav Pandit <pandit.parav@gmail.com> - 2016-01-07 00:20 +0100
        Re: [PATCHv1 2/6] IB/core: Added members to support rdma cgroup Tejun Heo <tj@kernel.org> - 2016-01-07 16:10 +0100
          Re: [PATCHv1 2/6] IB/core: Added members to support rdma cgroup Parav Pandit <pandit.parav@gmail.com> - 2016-01-07 20:50 +0100
  [PATCHv1 6/6] rdmacg: Added documentation for rdma controller. Parav Pandit <pandit.parav@gmail.com> - 2016-01-05 20:10 +0100
    Re: [PATCHv1 6/6] rdmacg: Added documentation for rdma controller. Tejun Heo <tj@kernel.org> - 2016-01-05 23:00 +0100
      Re: [PATCHv1 6/6] rdmacg: Added documentation for rdma controller. Parav Pandit <pandit.parav@gmail.com> - 2016-01-06 23:50 +0100
        Re: [PATCHv1 6/6] rdmacg: Added documentation for rdma controller. Tejun Heo <tj@kernel.org> - 2016-01-07 00:20 +0100
          Re: [PATCHv1 6/6] rdmacg: Added documentation for rdma controller. Parav Pandit <pandit.parav@gmail.com> - 2016-01-07 01:00 +0100
            Re: [PATCHv1 6/6] rdmacg: Added documentation for rdma controller. Tejun Heo <tj@kernel.org> - 2016-01-07 16:50 +0100
              Re: [PATCHv1 6/6] rdmacg: Added documentation for rdma controller. Parav Pandit <pandit.parav@gmail.com> - 2016-01-07 20:50 +0100
  [PATCHv1 1/6] rdmacg: Added rdma cgroup header file Parav Pandit <pandit.parav@gmail.com> - 2016-01-05 20:10 +0100
  [PATCHv1 3/6] rdmacg: implements rdma cgroup Parav Pandit <pandit.parav@gmail.com> - 2016-01-05 20:10 +0100
    Re: [PATCHv1 3/6] rdmacg: implements rdma cgroup Tejun Heo <tj@kernel.org> - 2016-01-05 23:10 +0100
      Re: [PATCHv1 3/6] rdmacg: implements rdma cgroup Parav Pandit <pandit.parav@gmail.com> - 2016-01-07 00:40 +0100
        Re: [PATCHv1 3/6] rdmacg: implements rdma cgroup Tejun Heo <tj@kernel.org> - 2016-01-07 16:30 +0100
          Re: [PATCHv1 3/6] rdmacg: implements rdma cgroup Parav Pandit <pandit.parav@gmail.com> - 2016-01-07 21:30 +0100
            Re: [PATCHv1 3/6] rdmacg: implements rdma cgroup Tejun Heo <tj@kernel.org> - 2016-01-07 21:30 +0100
              Re: [PATCHv1 3/6] rdmacg: implements rdma cgroup Parav Pandit <pandit.parav@gmail.com> - 2016-01-07 21:40 +0100
                Re: [PATCHv1 3/6] rdmacg: implements rdma cgroup Tejun Heo <tj@kernel.org> - 2016-01-07 21:50 +0100
  Re: [PATCHv1 0/6] rdma controller support Tejun Heo <tj@kernel.org> - 2016-01-05 23:00 +0100
    Re: [PATCHv1 0/6] rdma controller support Parav Pandit <pandit.parav@gmail.com> - 2016-01-07 00:20 +0100
      Re: [PATCHv1 0/6] rdma controller support Tejun Heo <tj@kernel.org> - 2016-01-07 16:10 +0100
        Re: [PATCHv1 0/6] rdma controller support Tejun Heo <tj@kernel.org> - 2016-01-07 21:10 +0100
          Re: [PATCHv1 0/6] rdma controller support Parav Pandit <pandit.parav@gmail.com> - 2016-01-07 21:40 +0100
            Re: [PATCHv1 0/6] rdma controller support Tejun Heo <tj@kernel.org> - 2016-01-07 21:40 +0100
              Re: [PATCHv1 0/6] rdma controller support Tejun Heo <tj@kernel.org> - 2016-01-07 21:50 +0100
                Re: [PATCHv1 0/6] rdma controller support Tejun Heo <tj@kernel.org> - 2016-01-07 22:00 +0100
                Re: [PATCHv1 0/6] rdma controller support Parav Pandit <pandit.parav@gmail.com> - 2016-01-07 22:10 +0100
                Re: [PATCHv1 0/6] rdma controller support Tejun Heo <tj@kernel.org> - 2016-01-07 22:10 +0100
                Re: [PATCHv1 0/6] rdma controller support Parav Pandit <pandit.parav@gmail.com> - 2016-01-07 22:20 +0100
                Re: [PATCHv1 0/6] rdma controller support Tejun Heo <tj@kernel.org> - 2016-01-07 22:10 +0100
                Re: [PATCHv1 0/6] rdma controller support Parav Pandit <pandit.parav@gmail.com> - 2016-01-07 22:10 +0100
              Re: [PATCHv1 0/6] rdma controller support Parav Pandit <pandit.parav@gmail.com> - 2016-01-07 21:50 +0100
        Re: [PATCHv1 0/6] rdma controller support Parav Pandit <pandit.parav@gmail.com> - 2016-01-07 21:10 +0100

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