linux-kernel - Re: [PATCHv12 1/3] rdmacg: Added rdma cgroup controller

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Date:   Wed, 7 Sep 2016 20:37:23 +0530
From:   Parav Pandit <pandit.parav@...il.com>
To:     Leon Romanovsky <leon@...nel.org>
Cc:     cgroups@...r.kernel.org, linux-doc@...r.kernel.org,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        linux-rdma@...r.kernel.org, Tejun Heo <tj@...nel.org>,
        Li Zefan <lizefan@...wei.com>,
        Johannes Weiner <hannes@...xchg.org>,
        Doug Ledford <dledford@...hat.com>,
        Christoph Hellwig <hch@....de>,
        Liran Liss <liranl@...lanox.com>,
        "Hefty, Sean" <sean.hefty@...el.com>,
        Jason Gunthorpe <jgunthorpe@...idianresearch.com>,
        Haggai Eran <haggaie@...lanox.com>,
        Jonathan Corbet <corbet@....net>, james.l.morris@...cle.com,
        serge@...lyn.com, Or Gerlitz <ogerlitz@...lanox.com>,
        Matan Barak <matanb@...lanox.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        linux-security-module@...r.kernel.org
Subject: Re: [PATCHv12 1/3] rdmacg: Added rdma cgroup controller

Hi Leon,

>> Signed-off-by: Parav Pandit <pandit.parav@...il.com>
>> +static struct rdmacg_resource_pool *
>> +get_cg_rpool_locked(struct rdma_cgroup *cg, struct rdmacg_device *device)
>> +{
>> +     struct rdmacg_resource_pool *rpool;
>> +
>> +     rpool = find_cg_rpool_locked(cg, device);
>> +     if (rpool)
>> +             return rpool;
>> +
>> +     rpool = kzalloc(sizeof(*rpool), GFP_KERNEL);
>> +     if (!rpool)
>> +             return ERR_PTR(-ENOMEM);
>> +
>> +     rpool->device = device;
>> +     set_all_resource_max_limit(rpool);
>> +
>> +     INIT_LIST_HEAD(&rpool->cg_node);
>> +     INIT_LIST_HEAD(&rpool->dev_node);
>> +     list_add_tail(&rpool->cg_node, &cg->rpools);
>> +     list_add_tail(&rpool->dev_node, &device->rpools);
>> +     return rpool;
>> +}
>
> <...>
>
>> +     for (p = cg; p; p = parent_rdmacg(p)) {
>> +             rpool = get_cg_rpool_locked(p, device);
>> +             if (IS_ERR_OR_NULL(rpool)) {
>
> get_cg_rpool_locked always returns !NULL (error, or pointer)

Can this change go as incremental change after this patch, since this
patch is close to completion?
Or I need to revise v13?

>
>> +                     ret = PTR_ERR(rpool);
>> +                     goto err;
>
> I didn't review the whole series yet.

Did you get a chance to review the series?