From: Matan Barak <matanb-VPRAkNaXOzVWk0Htik3J/w@public.gmane.org> To: Jason Gunthorpe <jgunthorpe-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org>, Christoph Hellwig <hch-jcswGhMUV9g@public.gmane.org> Cc: Parav Pandit <pandit.parav-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>, Tejun Heo <tj-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>, cgroups-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-doc-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, Linux Kernel Mailing List <linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>, linux-rdma-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, Li Zefan <lizefan-hv44wF8Li93QT0dZR+AlfA@public.gmane.org>, Johannes Weiner <hannes-druUgvl0LCNAfugRpC6u6w@public.gmane.org>, Doug Ledford <dledford-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>, Liran Liss <liranl-VPRAkNaXOzVWk0Htik3J/w@public.gmane.org>, "Hefty, Sean" <sean.hefty-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>, Haggai Eran <haggaie-VPRAkNaXOzVWk0Htik3J/w@public.gmane.org>, Jonathan Corbet <corbet-T1hC0tSOHrs@public.gmane.org>, james.l.morris-QHcLZuEGTsvQT0dZR+AlfA@public.gmane.org, serge-A9i7LUbDfNHQT0dZR+AlfA@public.gmane.org, Or Gerlitz <ogerlitz-VPRAkNaXOzVWk0Htik3J/w@public.gmane.org>, Andrew Morton <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: Sun, 11 Sep 2016 11:07:57 +0300 [thread overview] Message-ID: <ddbb4d5a-c352-925b-c3db-4f33f3e8ac50@mellanox.com> (raw) In-Reply-To: <20160910170151.GA5230-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org> On 10/09/2016 20:01, Jason Gunthorpe wrote: > On Sat, Sep 10, 2016 at 06:14:42PM +0200, Christoph Hellwig wrote: >> OFVWG meetings have absolutely zero relevance for Linux development. > > Well, to be fair there are a fair number of kernel developers on that > particular call.. > >> More "flexibility" for drivers just means giving up on designing a >> coherent API and leaving it to drivers authors to add crap to their >> own drivers. That's a major step backwards. > > Sadly, it isn't a step backwards, it is status quo - at least as far > as the uapi is concerned. > > Every single user space driver has its own private abi file, carefully > hidden in their driver, and dutifully copied over to user space: > > providers/cxgb3/iwch-abi.h > providers/cxgb4/cxgb4-abi.h > providers/hfi1verbs/hfi-abi.h > providers/i40iw/i40iw-abi.h > providers/ipathverbs/ipath-abi.h > providers/mlx4/mlx4-abi.h > providers/mlx5/mlx5-abi.h > providers/mthca/mthca-abi.h > providers/nes/nes-abi.h > providers/ocrdma/ocrdma_abi.h > providers/rxe/rxe-abi.h > > Just to pick two random examples: > > struct mlx5_create_cq { > struct ibv_create_cq ibv_cmd; > __u64 buf_addr; > __u64 db_addr; > __u32 cqe_size; > }; > > struct iwch_create_cq { > struct ibv_create_cq ibv_cmd; > uint64_t user_rptr_addr; > }; > > Love to hear ideas on a way forward that doesn't involve rewriting > everything :( > Yeah, unfortunately, the RDMA ABI is more driver specific ABI than a common user-kernel ABI. I guess this will become even worse, as the RDMA subsystem is evolving to serve more drivers with different object types. For example, I would like to hear how hfi1 are going to define their user-kernel ABI (once they leave the custom ioctls). >> They should not be using the code in drivers/infiniband. usnic is such >> an example of a driver that should never have been added in it's current >> form. > > +1 > > Jason > Matan
WARNING: multiple messages have this Message-ID (diff)
From: Matan Barak <matanb@mellanox.com> To: Jason Gunthorpe <jgunthorpe@obsidianresearch.com>, Christoph Hellwig <hch@lst.de> Cc: Parav Pandit <pandit.parav@gmail.com>, Tejun Heo <tj@kernel.org>, <cgroups@vger.kernel.org>, <linux-doc@vger.kernel.org>, "Linux Kernel Mailing List" <linux-kernel@vger.kernel.org>, <linux-rdma@vger.kernel.org>, Li Zefan <lizefan@huawei.com>, Johannes Weiner <hannes@cmpxchg.org>, Doug Ledford <dledford@redhat.com>, Liran Liss <liranl@mellanox.com>, "Hefty, Sean" <sean.hefty@intel.com>, Haggai Eran <haggaie@mellanox.com>, Jonathan Corbet <corbet@lwn.net>, <james.l.morris@oracle.com>, <serge@hallyn.com>, Or Gerlitz <ogerlitz@mellanox.com>, Andrew Morton <akpm@linux-foundation.org>, <linux-security-module@vger.kernel.org> Subject: Re: [PATCHv12 1/3] rdmacg: Added rdma cgroup controller Date: Sun, 11 Sep 2016 11:07:57 +0300 [thread overview] Message-ID: <ddbb4d5a-c352-925b-c3db-4f33f3e8ac50@mellanox.com> (raw) In-Reply-To: <20160910170151.GA5230@obsidianresearch.com> On 10/09/2016 20:01, Jason Gunthorpe wrote: > On Sat, Sep 10, 2016 at 06:14:42PM +0200, Christoph Hellwig wrote: >> OFVWG meetings have absolutely zero relevance for Linux development. > > Well, to be fair there are a fair number of kernel developers on that > particular call.. > >> More "flexibility" for drivers just means giving up on designing a >> coherent API and leaving it to drivers authors to add crap to their >> own drivers. That's a major step backwards. > > Sadly, it isn't a step backwards, it is status quo - at least as far > as the uapi is concerned. > > Every single user space driver has its own private abi file, carefully > hidden in their driver, and dutifully copied over to user space: > > providers/cxgb3/iwch-abi.h > providers/cxgb4/cxgb4-abi.h > providers/hfi1verbs/hfi-abi.h > providers/i40iw/i40iw-abi.h > providers/ipathverbs/ipath-abi.h > providers/mlx4/mlx4-abi.h > providers/mlx5/mlx5-abi.h > providers/mthca/mthca-abi.h > providers/nes/nes-abi.h > providers/ocrdma/ocrdma_abi.h > providers/rxe/rxe-abi.h > > Just to pick two random examples: > > struct mlx5_create_cq { > struct ibv_create_cq ibv_cmd; > __u64 buf_addr; > __u64 db_addr; > __u32 cqe_size; > }; > > struct iwch_create_cq { > struct ibv_create_cq ibv_cmd; > uint64_t user_rptr_addr; > }; > > Love to hear ideas on a way forward that doesn't involve rewriting > everything :( > Yeah, unfortunately, the RDMA ABI is more driver specific ABI than a common user-kernel ABI. I guess this will become even worse, as the RDMA subsystem is evolving to serve more drivers with different object types. For example, I would like to hear how hfi1 are going to define their user-kernel ABI (once they leave the custom ioctls). >> They should not be using the code in drivers/infiniband. usnic is such >> an example of a driver that should never have been added in it's current >> form. > > +1 > > Jason > Matan
next prev parent reply other threads:[~2016-09-11 8:07 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 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 [this message] 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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