From: Andrew Morton <akpm@osdl.org>
To: Roland Dreier <rolandd@cisco.com>
Cc: linux-kernel@vger.kernel.org, openib-general@openib.org
Subject: Re: [PATCH 06/16] IB uverbs: memory pinning implementation
Date: Tue, 28 Jun 2005 17:02:12 -0700 [thread overview]
Message-ID: <20050628170212.24623191.akpm@osdl.org> (raw)
In-Reply-To: <2005628163.qcqYIUxXOrm3IH43@cisco.com>
Roland Dreier <rolandd@cisco.com> wrote:
>
> Add support for pinning userspace memory regions and returning a list
> of pages in the region. This includes tracking pinned memory against
> vm_locked and preventing unprivileged users from exceeding RLIMIT_MEMLOCK.
>
Can you tell us a bit more about the design ideas here? What's it doing,
how and why?
We should look at these things and also decide whether some of this should
live in mm/*.
> +int ib_umem_get(struct ib_device *dev, struct ib_umem *mem,
> + void *addr, size_t size, int write)
> +{
> ...
> + if (!can_do_mlock())
> + return -EPERM;
> +
> ...
> + if ((locked > lock_limit) && !capable(CAP_IPC_LOCK)) {
The capable() test is redundant.
next prev parent reply other threads:[~2005-06-29 0:43 UTC|newest]
Thread overview: 37+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-06-28 23:03 [PATCH 00/16] Add InfiniBand userspace verbs (direct userspace access) Roland Dreier
2005-06-28 23:03 ` [PATCH 01/16] IB uverbs: core API extensions Roland Dreier
2005-06-28 23:03 ` [PATCH 02/16] IB uverbs: update kernel midlayer for new API Roland Dreier
2005-06-28 23:03 ` [PATCH 03/16] IB uverbs: update mthca " Roland Dreier
2005-06-28 23:03 ` [PATCH 04/16] IB uverbs: add user verbs ABI header Roland Dreier
2005-06-28 23:03 ` [PATCH 05/16] IB uverbs: core implementation Roland Dreier
2005-06-28 23:03 ` [PATCH 06/16] IB uverbs: memory pinning implementation Roland Dreier
2005-06-28 23:03 ` [PATCH 07/16] IB uverbs: hook up Kconfig/Makefile Roland Dreier
2005-06-28 23:03 ` [PATCH 08/16] IB uverbs: add mthca ABI header Roland Dreier
2005-06-28 23:03 ` [PATCH 09/16] IB uverbs: add mthca user doorbell record support Roland Dreier
2005-06-28 23:03 ` [PATCH 10/16] IB uverbs: add mthca user context support Roland Dreier
2005-06-28 23:03 ` [PATCH 11/16] IB uverbs: add mthca mmap support Roland Dreier
2005-06-28 23:03 ` [PATCH 12/16] IB uverbs: add mthca user PD support Roland Dreier
2005-06-28 23:03 ` [PATCH 13/16] IB uverbs: add mthca user MR support Roland Dreier
2005-06-28 23:03 ` [PATCH 14/16] IB uverbs: add mthca user CQ support Roland Dreier
2005-06-28 23:03 ` [PATCH 15/16] IB uverbs: add mthca user QP support Roland Dreier
2005-06-28 23:03 ` [PATCH 16/16] IB uverbs: add documentation file Roland Dreier
2005-06-29 0:10 ` [PATCH 14/16] IB uverbs: add mthca user CQ support Andrew Morton
2005-06-29 16:06 ` Roland Dreier
2005-06-29 0:07 ` [PATCH 12/16] IB uverbs: add mthca user PD support Andrew Morton
2005-06-29 16:06 ` Roland Dreier
2005-06-29 0:05 ` [PATCH 11/16] IB uverbs: add mthca mmap support Andrew Morton
2005-06-29 16:06 ` Roland Dreier
2005-07-05 19:20 ` Roland Dreier
2005-07-05 20:53 ` Michael S. Tsirkin
2005-07-05 22:07 ` Roland Dreier
2005-06-29 0:02 ` Andrew Morton [this message]
2005-06-29 16:06 ` [PATCH 06/16] IB uverbs: memory pinning implementation Roland Dreier
2005-06-29 0:27 ` [PATCH 05/16] IB uverbs: core implementation Greg KH
2005-06-29 1:38 ` [openib-general] " Tom Duffy
2005-06-29 4:13 ` Troy Benjegerdes
2005-06-29 16:12 ` Greg KH
2005-06-29 16:32 ` Troy Benjegerdes
2005-06-29 16:06 ` Roland Dreier
2005-06-29 17:01 ` Roland Dreier
2005-06-29 18:03 ` Greg KH
2005-06-30 3:13 ` [openib-general] " Ronald G. Minnich
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