From: Matan Barak <matanb-VPRAkNaXOzVWk0Htik3J/w@public.gmane.org> To: Tejun Heo <tj-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org> Cc: Parav Pandit <pandit.parav-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>, cgroups-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-doc-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-rdma-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, lizefan-hv44wF8Li93QT0dZR+AlfA@public.gmane.org, hannes-druUgvl0LCNAfugRpC6u6w@public.gmane.org, dledford-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org, hch-jcswGhMUV9g@public.gmane.org, liranl-VPRAkNaXOzVWk0Htik3J/w@public.gmane.org, sean.hefty-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org, jgunthorpe-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org, haggaie-VPRAkNaXOzVWk0Htik3J/w@public.gmane.org, corbet-T1hC0tSOHrs@public.gmane.org, james.l.morris-QHcLZuEGTsvQT0dZR+AlfA@public.gmane.org, serge-A9i7LUbDfNHQT0dZR+AlfA@public.gmane.org, ogerlitz-VPRAkNaXOzVWk0Htik3J/w@public.gmane.org, akpm-de/tnXTf+JLsfHDXvbKv3WD2FQJk+8+b@public.gmane.org, linux-security-module-u79uwXL29TY76Z2rM5mHXA@public.gmane.org Subject: Re: [PATCHv12 1/3] rdmacg: Added rdma cgroup controller Date: Thu, 1 Sep 2016 10:25:40 +0300 [thread overview] Message-ID: <9b6a346d-af4c-1e5f-0144-f68fb8e46c27@mellanox.com> (raw) In-Reply-To: <20160831211618.GA12660-piEFEHQLUPpN0TnZuCh8vA@public.gmane.org> On 01/09/2016 00:16, Tejun Heo wrote: > Hello, > > On Wed, Aug 31, 2016 at 06:07:30PM +0300, Matan Barak wrote: >> Currently, there are some discussions regarding the RDMA ABI. The current >> proposed approach (after a lot of discussions in the OFVWG) is to have >> driver dependent object types rather than the fixed set of IB object types >> we have today. >> AFAIK, some vendors might want to use the RDMA subsystem for a different >> fabrics which has a different set of objects. >> You could see RFCs for such concepts both from Mellanox and Intel on the >> linux-rdma mailing list. >> >> Saying that, maybe we need to make the resource types a bit more flexible >> and dynamic. > > That'd be back to square one and Christoph was dead against it too, > so... > Well, if I recall, the reason doing so last time was in order to allow flexible updating of ib_core independently, which is obviously not a good reason (to say the least). Since the new ABI will probably define new object types (all recent proposals go this way), the current approach could lead to either trying to map new objects to existing cgroup resource types, which could lead to some weird non 1:1 mapping, or having a split definitions - such that each driver will declare its objects both in the cgroups mechanism and in its driver dispatch table. Even worse than that, drivers could simply ignore the cgroups support while implementing their own resource types and get a very broken containers support. > Thanks. > Matan -- To unsubscribe from this list: send the line "unsubscribe linux-rdma" in the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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From: Matan Barak <matanb@mellanox.com> To: Tejun Heo <tj@kernel.org> Cc: Parav Pandit <pandit.parav@gmail.com>, <cgroups@vger.kernel.org>, <linux-doc@vger.kernel.org>, <linux-kernel@vger.kernel.org>, <linux-rdma@vger.kernel.org>, <lizefan@huawei.com>, <hannes@cmpxchg.org>, <dledford@redhat.com>, <hch@lst.de>, <liranl@mellanox.com>, <sean.hefty@intel.com>, <jgunthorpe@obsidianresearch.com>, <haggaie@mellanox.com>, <corbet@lwn.net>, <james.l.morris@oracle.com>, <serge@hallyn.com>, <ogerlitz@mellanox.com>, <akpm@linux-foundation.org>, <linux-security-module@vger.kernel.org> Subject: Re: [PATCHv12 1/3] rdmacg: Added rdma cgroup controller Date: Thu, 1 Sep 2016 10:25:40 +0300 [thread overview] Message-ID: <9b6a346d-af4c-1e5f-0144-f68fb8e46c27@mellanox.com> (raw) In-Reply-To: <20160831211618.GA12660@htj.duckdns.org> On 01/09/2016 00:16, Tejun Heo wrote: > Hello, > > On Wed, Aug 31, 2016 at 06:07:30PM +0300, Matan Barak wrote: >> Currently, there are some discussions regarding the RDMA ABI. The current >> proposed approach (after a lot of discussions in the OFVWG) is to have >> driver dependent object types rather than the fixed set of IB object types >> we have today. >> AFAIK, some vendors might want to use the RDMA subsystem for a different >> fabrics which has a different set of objects. >> You could see RFCs for such concepts both from Mellanox and Intel on the >> linux-rdma mailing list. >> >> Saying that, maybe we need to make the resource types a bit more flexible >> and dynamic. > > That'd be back to square one and Christoph was dead against it too, > so... > Well, if I recall, the reason doing so last time was in order to allow flexible updating of ib_core independently, which is obviously not a good reason (to say the least). Since the new ABI will probably define new object types (all recent proposals go this way), the current approach could lead to either trying to map new objects to existing cgroup resource types, which could lead to some weird non 1:1 mapping, or having a split definitions - such that each driver will declare its objects both in the cgroups mechanism and in its driver dispatch table. Even worse than that, drivers could simply ignore the cgroups support while implementing their own resource types and get a very broken containers support. > Thanks. > Matan
next prev parent reply other threads:[~2016-09-01 7:25 UTC|newest] Thread overview: 112+ messages / expand[flat|nested] mbox.gz Atom feed top 2016-08-31 8:37 [PATCHv12 0/3] rdmacg: IB/core: rdma controller support Parav Pandit 2016-08-31 8:37 ` [PATCHv12 1/3] rdmacg: Added rdma cgroup controller Parav Pandit 2016-08-31 9:38 ` Leon Romanovsky 2016-09-07 15:07 ` Parav Pandit 2016-09-08 6:12 ` Leon Romanovsky 2016-09-08 10:20 ` Parav Pandit 2016-09-08 10:20 ` Parav Pandit 2016-08-31 15:07 ` Matan Barak 2016-08-31 15:07 ` Matan Barak 2016-08-31 21:16 ` Tejun Heo [not found] ` <20160831211618.GA12660-piEFEHQLUPpN0TnZuCh8vA@public.gmane.org> 2016-09-01 7:25 ` Matan Barak [this message] 2016-09-01 7:25 ` Matan Barak 2016-09-01 8:44 ` Christoph Hellwig [not found] ` <20160901084406.GA4115-jcswGhMUV9g@public.gmane.org> 2016-09-07 7:55 ` Parav Pandit 2016-09-07 7:55 ` Parav Pandit 2016-09-07 8:51 ` Matan Barak 2016-09-07 8:51 ` Matan Barak 2016-09-07 14:54 ` Parav Pandit [not found] ` <ae3adcc4-253e-f87c-6ff6-202c91599f48-VPRAkNaXOzVWk0Htik3J/w@public.gmane.org> 2016-09-10 16:14 ` Christoph Hellwig 2016-09-10 16:14 ` Christoph Hellwig 2016-09-10 17:01 ` Jason Gunthorpe [not found] ` <20160910170151.GA5230-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org> 2016-09-11 8:07 ` Matan Barak 2016-09-11 8:07 ` Matan Barak 2016-09-11 13:34 ` Christoph Hellwig 2016-09-11 14:35 ` Leon Romanovsky 2016-09-11 17:14 ` Jason Gunthorpe 2016-09-11 17:24 ` Christoph Hellwig 2016-09-11 17:52 ` Jason Gunthorpe [not found] ` <20160911175235.GB13442-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org> 2016-09-12 5:07 ` Leon Romanovsky 2016-09-12 5:07 ` Leon Romanovsky [not found] ` <20160912050717.GE8812-2ukJVAZIZ/Y@public.gmane.org> 2016-09-14 7:06 ` Parav Pandit 2016-09-14 7:06 ` Parav Pandit 2016-09-14 8:14 ` Matan Barak 2016-09-14 8:14 ` Matan Barak [not found] ` <13a00119-e629-2d34-d08b-c02bb6beceea-VPRAkNaXOzVWk0Htik3J/w@public.gmane.org> 2016-09-14 9:19 ` Parav Pandit 2016-09-14 9:19 ` Parav Pandit [not found] ` <CAG53R5X4stfy5+Jmg+XReUJqt56Z-zABK+UEswHW1dXhH-9cNw-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org> 2016-09-15 18:56 ` Leon Romanovsky 2016-09-15 18:56 ` Leon Romanovsky 2016-09-21 4:43 ` Parav Pandit 2016-09-21 14:26 ` Tejun Heo [not found] ` <20160921142645.GB10734-piEFEHQLUPpN0TnZuCh8vA@public.gmane.org> 2016-09-21 16:02 ` Parav Pandit 2016-09-21 16:02 ` Parav Pandit [not found] ` <CAG53R5WMuojhzFGmqk6nHfypd9Hq4dGsWRKjtUyMZ=RezU-LhQ-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org> 2016-10-04 18:19 ` Parav Pandit 2016-10-04 18:19 ` Parav Pandit 2016-10-04 18:19 ` Parav Pandit 2016-10-05 6:37 ` Christoph Hellwig 2016-10-05 11:22 ` Leon Romanovsky 2016-10-05 15:36 ` Tejun Heo [not found] ` <20161005063735.GC3086-jcswGhMUV9g@public.gmane.org> 2016-10-06 12:55 ` Parav Pandit 2016-10-06 12:55 ` Parav Pandit 2016-10-18 20:15 ` Parav Pandit 2016-09-19 13:10 ` Dalessandro, Dennis 2016-09-19 13:10 ` Dalessandro, Dennis 2016-09-19 17:00 ` Parav Pandit 2016-09-19 17:00 ` Parav Pandit [not found] ` <CAG53R5Ws4BJKqeEYfEoEx5kuaXUmhDKcXfH4Vx=LTMK6tKMG0A-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org> 2016-09-10 16:12 ` Christoph Hellwig 2016-09-10 16:12 ` Christoph Hellwig [not found] ` <20160910161228.GB29259-jcswGhMUV9g@public.gmane.org> 2016-09-11 7:40 ` Matan Barak 2016-09-11 7:40 ` Matan Barak 2016-08-31 8:37 ` [PATCHv12 2/3] IB/core: added support to use " Parav Pandit [not found] ` <1472632647-1525-1-git-send-email-pandit.parav-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> 2016-08-31 8:37 ` [PATCHv12 3/3] rdmacg: Added documentation for rdmacg Parav Pandit 2016-08-31 8:37 ` Parav Pandit 2016-08-31 13:56 ` [PATCHv12 0/3] rdmacg: IB/core: rdma controller support Tejun Heo 2016-08-31 13:56 ` Tejun Heo 2016-10-05 11:22 ` Leon Romanovsky [not found] ` <20161005112206.GC9282-2ukJVAZIZ/Y@public.gmane.org> 2016-10-06 12:59 ` Parav Pandit 2016-10-06 12:59 ` Parav Pandit 2016-10-06 13:49 ` Parav Pandit [not found] ` <CAG53R5VNVb=8-LJbDRqjtOZG347ucPuc420bcfnDgBKMoKqU-w-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org> 2016-10-10 4:46 ` Leon Romanovsky [not found] ` <20161010044623.GI9282-2ukJVAZIZ/Y@public.gmane.org> 2016-10-10 6:29 ` Parav Pandit [not found] ` <CAG53R5UM6nSTZ7=0S9reKGX45CpNBi8soSDVZyXkN-z0_XXWWQ-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org> 2016-10-10 7:33 ` Leon Romanovsky [not found] ` <20161010073343.GK9282-2ukJVAZIZ/Y@public.gmane.org> 2016-10-10 8:35 ` Parav Pandit [not found] ` <CAG53R5WeWSrJ5-Gtt-cXpUr0r73zh3bqQM_G5zTue27tPtVEXA-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org> 2016-10-10 8:52 ` Leon Romanovsky [not found] ` <20161010085241.GL9282-2ukJVAZIZ/Y@public.gmane.org> 2016-10-10 9:22 ` Parav Pandit 2016-10-10 12:25 ` Tejun Heo [not found] ` <20161010122545.GA27360-qYNAdHglDFBN0TnZuCh8vA@public.gmane.org> 2016-10-10 13:13 ` Parav Pandit [not found] ` <CAG53R5V5yE4PsDBjP9BieG_=39M0G1kx-AfBEzWK4LUCxNnYBA-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org> 2016-10-10 13:20 ` Tejun Heo [not found] ` <20161010132014.GD29742-qYNAdHglDFBN0TnZuCh8vA@public.gmane.org> 2016-10-10 13:32 ` Parav Pandit [not found] ` <CAG53R5ULKCqtw45E6t4hYdRV+y_OQqVazf=7A7Ax_XAJ2K0_dw-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org> 2016-10-13 10:34 ` Leon Romanovsky [not found] ` <20161013103430.GB9282-2ukJVAZIZ/Y@public.gmane.org> 2016-10-13 11:04 ` Parav Pandit 2016-10-13 23:14 ` Tejun Heo [not found] ` <20161013231413.GA32534-qYNAdHglDFBN0TnZuCh8vA@public.gmane.org> 2016-10-18 20:02 ` Parav Pandit [not found] ` <CAG53R5UciPpa5d8BWyR-tks3LBrBwRCN2NyBbbm1e3EE-OWSYQ-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org> 2016-10-18 21:51 ` Tejun Heo [not found] ` <20161018215134.GB2761-piEFEHQLUPpN0TnZuCh8vA@public.gmane.org> 2016-10-19 9:34 ` Parav Pandit [not found] ` <CAG53R5UEvkPBM0yFrR=fvEzyCrku2q=rLZyDVrSs9q+3hgbSmQ-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org> 2016-10-19 14:33 ` Tejun Heo [not found] ` <20161019143345.GA18532-piEFEHQLUPpN0TnZuCh8vA@public.gmane.org> 2016-10-19 19:03 ` Parav Pandit [not found] ` <CAG53R5WUyA7JBn=PeivUc5F5k210xf_HccPXFt3r7ZGYHOPaGA-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org> 2016-10-19 19:20 ` Tejun Heo [not found] ` <20161019192006.GB3044-piEFEHQLUPpN0TnZuCh8vA@public.gmane.org> 2016-10-19 19:54 ` Parav Pandit [not found] ` <CAG53R5X5dyo7J-UkeMxi_mSxgv=c54fV=anuCZtmf9kaYwDbPw-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org> 2016-10-19 20:05 ` Tejun Heo [not found] ` <20161019200536.GC3044-piEFEHQLUPpN0TnZuCh8vA@public.gmane.org> 2016-10-19 20:18 ` Parav Pandit [not found] ` <CAG53R5XkRKdo-SCaREZvov3AGp5MSd18RpQ+0HEu-htUzqwOOw-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org> 2016-10-31 6:54 ` Leon Romanovsky [not found] ` <20161031065441.GY3617-2ukJVAZIZ/Y@public.gmane.org> 2016-11-01 11:03 ` Parav Pandit [not found] ` <CAG53R5VKwntDHX101+5aaGoyKMKQuiKQWam575iFAxhmKxhE1g-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org> 2016-11-01 14:07 ` Leon Romanovsky [not found] ` <20161101140732.GC3617-2ukJVAZIZ/Y@public.gmane.org> 2016-11-02 4:34 ` Parav Pandit 2016-11-03 18:00 ` Leon Romanovsky [not found] ` <20161103180006.GL3617-2ukJVAZIZ/Y@public.gmane.org> 2016-11-04 4:20 ` Leon Romanovsky 2016-11-04 4:20 ` Liran Liss [not found] ` <AM4PR0501MB2802030EE9E359133E04439CB1A20-dp/nxUn679jTOi/YP668sMDSnupUy6xnnBOFsp37pqbUKgpGm//BTAC/G2K4zDHf@public.gmane.org> 2016-11-04 4:47 ` Parav Pandit [not found] ` <CAG53R5Vd58wEBKgAajp9VvJmB5sO2Umii0JE4XaLYKbfrJrxyg-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org> 2016-11-04 4:52 ` Liran Liss [not found] ` <AM4PR0501MB2802E87F709F41DDEC20B7C9B1A20-dp/nxUn679jTOi/YP668sMDSnupUy6xnnBOFsp37pqbUKgpGm//BTAC/G2K4zDHf@public.gmane.org> 2016-11-04 4:57 ` Parav Pandit [not found] ` <CAG53R5UyZPh9wduPZGRg2P09n2Og8oODqb+QW=7ryAPqJDa6Vw-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org> 2016-11-04 5:06 ` Liran Liss [not found] ` <AM4PR0501MB28025BE002CBA9D04675A5A5B1A20-dp/nxUn679jTOi/YP668sMDSnupUy6xnnBOFsp37pqbUKgpGm//BTAC/G2K4zDHf@public.gmane.org> 2016-11-04 5:44 ` Parav Pandit [not found] ` <CAG53R5WdauHpML66g-O6zj+j_DUYWJMPjmL1xDaSxwDmPPYm2A-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org> 2016-11-08 8:12 ` Liran Liss [not found] ` <HE1PR0501MB2812298C05431B08B0F408EEB1A60-692Kmc8YnlIVrnpjwTCbp8DSnupUy6xnnBOFsp37pqbUKgpGm//BTAC/G2K4zDHf@public.gmane.org> 2016-11-10 7:41 ` Parav Pandit [not found] ` <CAG53R5XqZwrYsdX=JQ1D4cDB0h65RDQVb=VCiaR5TXuf_uoO0Q-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org> 2016-11-10 16:38 ` Leon Romanovsky [not found] ` <20161110163837.GE28957-2ukJVAZIZ/Y@public.gmane.org> 2016-11-10 16:46 ` Tejun Heo [not found] ` <20161110164638.GC26105-piEFEHQLUPpN0TnZuCh8vA@public.gmane.org> 2016-11-10 17:04 ` Parav Pandit [not found] ` <CAG53R5UGfhGHc3-jgUjH5taFzTHg3BOgXi25QjuQfUFc0U7tgw-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org> 2016-11-10 17:32 ` Tejun Heo [not found] ` <20161110173217.GD26105-piEFEHQLUPpN0TnZuCh8vA@public.gmane.org> 2016-11-10 17:56 ` Parav Pandit 2016-11-10 19:23 ` Tejun Heo [not found] ` <20161110192344.GA4805-piEFEHQLUPpN0TnZuCh8vA@public.gmane.org> 2016-11-11 13:00 ` Parav Pandit 2016-11-04 4:28 ` Parav Pandit
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