From: David Marchand <david.marchand@redhat.com>
To: Anatoly Burakov <anatoly.burakov@intel.com>
Cc: dev <dev@dpdk.org>, "Kinsella, Ray" <ray.kinsella@intel.com>
Subject: Re: [dpdk-dev] [PATCH] vfio: map contiguous areas in one go
Date: Fri, 27 Mar 2020 11:13:09 +0100 [thread overview]
Message-ID: <CAJFAV8yR0XpNJY1DpUgmPKU5ux+kquNvF6LmtJCjOAgsu7NX5A@mail.gmail.com> (raw)
In-Reply-To: <c6550c8e66dbc7a54a0b495ecda58b0eb79c07ca.1582637079.git.anatoly.burakov@intel.com>
On Tue, Feb 25, 2020 at 2:25 PM Anatoly Burakov
<anatoly.burakov@intel.com> wrote:
>
> Currently, when we are creating DMA mappings for memory that's
> either external or is backed by hugepages in IOVA as PA mode, we
> assume that each page is necessarily discontiguous. This may not
> actually be the case, especially for external memory, where the
> user is able to create their own IOVA table and make it
> contiguous. This is a problem because VFIO has a limited number
> of DMA mappings, and it does not appear to concatenate them and
> treats each mapping as separate, even when they cover adjacent
> areas.
>
> Fix this so that we always map contiguous memory in a single
> chunk, as opposed to mapping each segment separately.
>
> Signed-off-by: Anatoly Burakov <anatoly.burakov@intel.com>
Applied, thanks.
--
David Marchand
prev parent reply other threads:[~2020-03-27 10:13 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-02-25 13:24 Anatoly Burakov
2020-02-25 13:49 ` Ray Kinsella
2020-02-25 14:21 ` Burakov, Anatoly
2020-03-27 10:13 ` David Marchand [this message]
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