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Date: Wed, 4 Nov 2015 22:53:36 +0530
Message-ID: <CAG53R5X4wD1G4wB5vETMmVTc3XzatkEy3zamiTiVZ36dVYDAqQ@mail.gmail.com>
Subject: Re: RFC rdma cgroup
From: Parav Pandit <pandit.parav@gmail.com>
To: Haggai Eran <haggaie@mellanox.com>
Cc: Tejun Heo <tj@kernel.org>, Doug Ledford <dledford@redhat.com>,
        "Hefty, Sean" <sean.hefty@intel.com>,
        "linux-rdma@vger.kernel.org" <linux-rdma@vger.kernel.org>,
        "cgroups@vger.kernel.org" <cgroups@vger.kernel.org>,
        Liran Liss <liranl@mellanox.com>,
        "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
        "lizefan@huawei.com" <lizefan@huawei.com>,
        Johannes Weiner <hannes@cmpxchg.org>, Jonathan Corbet <corbet@lwn.net>,
        "james.l.morris@oracle.com" <james.l.morris@oracle.com>,
        "serge@hallyn.com" <serge@hallyn.com>,
        Or Gerlitz <ogerlitz@mellanox.com>, Matan Barak <matanb@mellanox.com>,
        "raindel@mellanox.com" <raindel@mellanox.com>,
        "akpm@linux-foundation.org" <akpm@linux-foundation.org>,
        "linux-security-module@vger.kernel.org" 
	<linux-security-module@vger.kernel.org>,
        Jason Gunthorpe <jgunthorpe@obsidianresearch.com>
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On Wed, Nov 4, 2015 at 5:28 PM, Haggai Eran <haggaie@mellanox.com> wrote:
> On 03/11/2015 21:11, Parav Pandit wrote:
>> So it looks like below,
>> #cat rdma.resources.verbs.list
>> Output:
>> mlx4_0 uctx ah pd cq mr mw srq qp flow
>> mlx4_1 uctx ah pd cq mr mw srq qp flow rss_wq
> What happens if you set a limit of rss_wq to mlx4_0 in this example?
> Would it fail?
Yes, In above example, mlx4_0 device didn't had support for rss_wq, so
it didn't advertise in the list file that it supports rss_wq.

> I think it would be simpler for administrators if they
> can configure every resource supported by uverbs. If a resource is not
> supported by a specific device, you can never go over the limit anyway.
>
Exactly. Thats the implementation today.
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