From: Troy Benjegerdes <hozer@hozed.org>
To: Roland Dreier <roland@topspin.com>
Cc: linux-kernel@vger.kernel.org, openib-general@openib.org
Subject: Re: [PATCH][RFC][0/4] InfiniBand userspace verbs implementation
Date: Mon, 11 Apr 2005 09:22:13 -0500 [thread overview]
Message-ID: <20050411142213.GC26127@kalmia.hozed.org> (raw)
In-Reply-To: <200544159.Ahk9l0puXy39U6u6@topspin.com>
> In particular, the memory pinning code in in uverbs_mem.c could stand
> a looking over. In addition, a sanity check of the write()-based
> scheme for passing commands into the kernel in uverbs_main.c and
> uverbs_cmd.c is probably worthwhile.
How is memory pinning handled? (I haven't had time to read all the code,
so please excuse my ignorance of something obvious).
The old mellanox drivers used to have a hack to call 'sys_mlock', and
promiscuously lock memory any old userspace application asked for. What
is the API for the new uverbs memory registration, and how will things
like memory hotplug and NUMA page migration be able to unpin pages
locked by a user program?
I have applications that would benefit from being able to register 15GB
of memory on a machine with 16GB. Right now, MPI and other possible
users of infiniband in userspace have to play cacheing games and limit
what they can register. But locking all that memory without providing
the kernel a way to unlock it under memory pressure or for page
migration seems like a bad idea.
next prev parent reply other threads:[~2005-04-11 14:22 UTC|newest]
Thread overview: 143+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-04-04 22:09 Roland Dreier
2005-04-04 22:09 ` [PATCH][RFC][1/4] IB: core changes for userspace verbs Roland Dreier
2005-04-04 22:09 ` [PATCH][RFC][2/4] IB: userspace verbs main module Roland Dreier
2005-04-04 22:09 ` [PATCH][RFC][3/4] IB: userspace verbs mthca changes Roland Dreier
2005-04-04 22:09 ` [PATCH][RFC][4/4] IB: userspace verbs Kconfig/Makefile changes Roland Dreier
2005-04-04 22:49 ` [openib-general] [PATCH][RFC][3/4] IB: userspace verbs mthca changes Tom Duffy
2005-04-04 23:34 ` Roland Dreier
2005-04-21 0:37 ` [PATCH][MTHCA] fix sparc build WAS: " Tom Duffy
2005-04-21 0:38 ` David S. Miller
2005-04-11 14:22 ` Troy Benjegerdes [this message]
2005-04-11 15:34 ` [PATCH][RFC][0/4] InfiniBand userspace verbs implementation Roland Dreier
2005-04-11 16:33 ` Troy Benjegerdes
2005-04-11 16:56 ` Roland Dreier
2005-04-11 18:01 ` Troy Benjegerdes
2005-04-11 18:03 ` Roland Dreier
2005-04-12 0:13 ` Andrew Morton
2005-04-12 0:21 ` Roland Dreier
2005-04-12 18:23 ` Michael S. Tsirkin
2005-04-13 18:28 ` Roland Dreier
2005-04-13 19:32 ` Andrew Morton
2005-04-13 1:04 ` [openib-general] " Libor Michalek
2005-04-18 17:15 ` Timur Tabi
2005-04-26 3:31 ` Libor Michalek
2005-05-04 18:27 ` Timur Tabi
2005-05-05 18:48 ` Timur Tabi
2005-05-06 23:08 ` Timur Tabi
2005-05-07 13:18 ` Hugh Dickins
2005-05-07 14:45 ` Timur Tabi
2005-05-07 16:30 ` Hugh Dickins
2005-05-11 20:12 ` William Jordan
2005-05-11 20:42 ` Hugh Dickins
2005-05-11 22:52 ` Andrea Arcangeli
2005-05-11 22:49 ` Andrea Arcangeli
2005-05-11 22:53 ` Timur Tabi
2005-05-11 23:05 ` Andrea Arcangeli
2005-05-05 23:34 ` Libor Michalek
2005-04-18 16:22 ` Timur Tabi
2005-04-18 16:43 ` Christoph Hellwig
2005-04-18 16:45 ` Timur Tabi
2005-04-24 2:44 ` Andrew Morton
2005-04-24 14:23 ` Timur Tabi
2005-04-24 20:53 ` Greg KH
2005-04-24 21:52 ` Timur Tabi
2005-04-25 1:03 ` Greg KH
2005-04-25 4:12 ` Timur Tabi
2005-04-25 13:30 ` Dave Hansen
2005-04-25 13:15 ` Roland Dreier
2005-04-25 13:17 ` Christoph Hellwig
2005-04-25 14:16 ` Roland Dreier
2005-04-25 20:54 ` Andrew Morton
2005-04-25 21:12 ` Roland Dreier
2005-04-25 22:14 ` Andrew Morton
2005-04-25 22:21 ` Timur Tabi
2005-04-25 22:32 ` Andrew Morton
2005-04-25 23:58 ` Roland Dreier
2005-04-26 0:11 ` Andrew Morton
2005-04-26 0:23 ` Roland Dreier
2005-04-26 0:37 ` Andrew Morton
2005-04-26 2:21 ` Timur Tabi
2005-04-26 3:16 ` Andrew Morton
2005-04-26 3:38 ` Timur Tabi
2005-04-26 4:33 ` Andrew Morton
2005-04-26 14:07 ` Timur Tabi
2005-04-26 15:31 ` Roland Dreier
2005-04-26 15:42 ` [openib-general] " Libor Michalek
2005-04-26 15:49 ` Roland Dreier
2005-04-26 19:28 ` Andrew Morton
2005-04-26 20:14 ` Roland Dreier
2005-04-26 20:18 ` Timur Tabi
2005-04-26 20:37 ` Andrew Morton
2005-04-29 14:26 ` Bill Jordan
2005-04-29 15:56 ` Caitlin Bestler
2005-04-29 16:45 ` RDMA memory registration (was: [openib-general] Re: [PATCH][RFC][0/4] InfiniBand userspace verbs implementation) Roland Dreier
2005-04-29 17:23 ` Libor Michalek
2005-04-29 18:22 ` RDMA memory registration Brice Goglin
2005-04-29 18:31 ` Roland Dreier
2005-04-29 19:33 ` [openib-general] " Grant Grundler
2005-05-03 8:42 ` David Addison
2005-05-03 15:36 ` Grant Grundler
2005-04-29 19:43 ` RDMA memory registration (was: [openib-general] Re: [PATCH][RFC][0/4] InfiniBand userspace verbs implementation) Bill Jordan
2005-04-29 19:45 ` RDMA memory registration Roland Dreier
2005-04-29 17:04 ` [openib-general] Re: [PATCH][RFC][0/4] InfiniBand userspace verbs implementation Libor Michalek
2005-04-30 0:31 ` Caitlin Bestler
2005-05-03 18:43 ` Andy Isaacson
2005-05-03 19:04 ` Caitlin Bestler
2005-05-04 18:22 ` William Jordan
2005-05-05 1:27 ` Rik van Riel
2005-05-05 1:57 ` Andy Isaacson
2005-04-26 20:32 ` Andrew Morton
2005-04-26 21:23 ` Roland Dreier
2005-04-27 0:05 ` Andrew Morton
2005-04-27 2:13 ` Roland Dreier
2005-04-27 3:21 ` Caitlin Bestler
2005-04-27 3:15 ` Caitlin Bestler
2005-04-26 2:03 ` IWAMOTO Toshihiro
2005-04-26 2:16 ` Timur Tabi
2005-04-26 2:26 ` [openib-general] " Stephen Langdon
2005-04-25 22:23 ` Timur Tabi
2005-04-25 22:35 ` Andrew Morton
2005-04-25 22:42 ` Timur Tabi
2005-04-25 23:13 ` Andrew Morton
2005-04-25 23:21 ` Timur Tabi
2005-04-25 23:27 ` Andrew Morton
2005-04-26 0:08 ` Roland Dreier
2005-04-25 22:51 ` [openib-general] Re: [PATCH][RFC][0/4] InfiniBand userspace verbsimplementation Bob Woodruff
2005-04-25 23:13 ` Timur Tabi
2005-04-25 23:17 ` Andrew Morton
2005-04-25 23:29 ` Bob Woodruff
2005-04-25 23:17 ` [openib-general] Re: [PATCH][RFC][0/4] InfiniBand userspace verbs implementation Libor Michalek
2005-04-25 23:24 ` Andrew Morton
2005-04-25 23:37 ` Caitlin Bestler
2005-04-26 0:10 ` Andrew Morton
2005-04-26 3:55 ` Libor Michalek
2005-04-26 0:02 ` Roland Dreier
2005-04-26 6:12 ` Christoph Hellwig
2005-04-26 13:45 ` [openib-general] " Caitlin Bestler
2005-04-26 15:24 ` Timur Tabi
2005-04-25 19:11 ` Andy Isaacson
2005-04-18 16:09 ` Timur Tabi
2005-04-18 16:12 ` Roland Dreier
2005-04-18 16:50 ` Timur Tabi
2005-04-21 19:47 ` Pavel Machek
2005-04-18 16:16 ` Arjan van de Ven
2005-04-18 16:25 ` Timur Tabi
2005-04-18 19:40 ` Arjan van de Ven
2005-04-18 20:00 ` Timur Tabi
2005-04-18 20:05 ` Arjan van de Ven
2005-04-18 20:19 ` Timur Tabi
2005-04-18 20:07 ` [openib-general] " Bernhard Fischer
2005-04-21 2:17 ` Troy Benjegerdes
2005-04-21 3:07 ` Timur Tabi
2005-04-21 17:38 ` Andy Isaacson
2005-04-21 18:39 ` Timur Tabi
2005-04-21 19:56 ` Andy Isaacson
2005-04-21 20:07 ` Timur Tabi
2005-04-21 20:12 ` Chris Wright
2005-04-21 20:14 ` Timur Tabi
2005-04-21 20:25 ` Chris Wright
2005-04-21 20:30 ` Arjan van de Ven
2005-04-22 6:14 ` Greg KH
2005-04-22 17:55 ` Timur Tabi
2005-04-22 18:12 ` Arjan van de Ven
2005-04-29 0:56 ` Andrew Morton
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