From: Stephen Hemminger <stephen@networkplumber.org>
To: Yongseok Koh <yskoh@mellanox.com>
Cc: shahafs@mellanox.com, dev@dpdk.org
Subject: Re: [dpdk-dev] [PATCH v3 5/6] net/mlx4: add control of excessive memory pinning by kernel
Date: Mon, 13 May 2019 21:54:37 -0700 [thread overview]
Message-ID: <20190513215437.65b8f225@hermes.lan> (raw)
In-Reply-To: <20190513215222.46f6e3fb@hermes.lan>
On Mon, 13 May 2019 21:52:22 -0700
Stephen Hemminger <stephen@networkplumber.org> wrote:
> On Mon, 1 Apr 2019 14:17:56 -0700
> Yongseok Koh <yskoh@mellanox.com> wrote:
>
> > +- ``mr_ext_memseg_en`` parameter [int]
> > +
> > + A nonzero value enables extending memseg when registering DMA memory. If
> > + enabled, the number of entries in MR (Memory Region) lookup table on datapath
> > + is minimized and it benefits performance. On the other hand, it worsens memory
> > + utilization because registered memory is pinned by kernel driver. Even if a
> > + page in the extended chunk is freed, that doesn't become reusable until the
> > + entire memory is freed.
> > +
> > + Enabled by default.
> > +
>
> This module parameter does not appear in the upstream Linux kernel drivers (even 5.2).
> What code are you referring to?
Nevermind, it is a DPDK not kernel parameter.
next prev parent reply other threads:[~2019-05-14 4:54 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-03-07 7:41 [PATCH 0/6] net/mlx: enable secondary process to register DMA memory Yongseok Koh
2019-03-07 7:41 ` [PATCH 1/6] net/mlx: remove debug messages on datapath Yongseok Koh
2019-03-07 7:41 ` [PATCH 2/6] net/mlx5: fix external memory registration Yongseok Koh
2019-03-07 7:41 ` [PATCH 3/6] net/mlx5: add control of excessive memory pinning by kernel Yongseok Koh
2019-03-07 7:41 ` [PATCH 4/6] net/mlx5: enable secondary process to register DMA memory Yongseok Koh
2019-03-07 7:41 ` [PATCH 5/6] net/mlx4: add control of excessive memory pinning by kernel Yongseok Koh
2019-03-07 7:41 ` [PATCH 6/6] net/mlx4: enable secondary process to register DMA memory Yongseok Koh
2019-03-07 7:55 ` [PATCH 0/6] net/mlx: " Yongseok Koh
2019-03-14 12:45 ` Shahaf Shuler
2019-03-25 19:22 ` [PATCH v2 " Yongseok Koh
2019-03-25 19:22 ` [PATCH v2 1/6] net/mlx: remove debug messages on datapath Yongseok Koh
2019-03-25 19:22 ` [PATCH v2 2/6] net/mlx5: fix external memory registration Yongseok Koh
2019-03-25 19:22 ` [PATCH v2 3/6] net/mlx5: add control of excessive memory pinning by kernel Yongseok Koh
2019-03-25 19:22 ` [PATCH v2 4/6] net/mlx5: enable secondary process to register DMA memory Yongseok Koh
2019-03-25 19:22 ` [PATCH v2 5/6] net/mlx4: add control of excessive memory pinning by kernel Yongseok Koh
2019-03-25 19:22 ` [PATCH v2 6/6] net/mlx4: enable secondary process to register DMA memory Yongseok Koh
2019-04-01 21:17 ` [PATCH v3 0/6] net/mlx: " Yongseok Koh
2019-04-01 21:17 ` [PATCH v3 1/6] net/mlx: remove debug messages on datapath Yongseok Koh
2019-04-01 21:17 ` [PATCH v3 2/6] net/mlx5: fix external memory registration Yongseok Koh
2019-04-01 21:17 ` [PATCH v3 3/6] net/mlx5: add control of excessive memory pinning by kernel Yongseok Koh
2019-04-01 21:17 ` [PATCH v3 4/6] net/mlx5: enable secondary process to register DMA memory Yongseok Koh
2019-04-01 21:17 ` [PATCH v3 5/6] net/mlx4: add control of excessive memory pinning by kernel Yongseok Koh
2019-05-14 4:52 ` [dpdk-dev] " Stephen Hemminger
2019-05-14 4:54 ` Stephen Hemminger [this message]
2019-04-01 21:17 ` [PATCH v3 6/6] net/mlx4: enable secondary process to register DMA memory Yongseok Koh
2019-04-02 7:13 ` [PATCH v3 0/6] net/mlx: " Shahaf Shuler
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