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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)
Message-ID: <20190514045437.UjDf2MPdmVhj4SgZOmrK7qIjeYkutZIpbIDy9uu7h-o@z> (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.

  parent reply	other threads:[~2019-05-14  4:54 UTC|newest]

Thread overview: 44+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-03-07  7:41 [dpdk-dev] [PATCH 0/6] net/mlx: enable secondary process to register DMA memory Yongseok Koh
2019-03-07  7:41 ` [dpdk-dev] [PATCH 1/6] net/mlx: remove debug messages on datapath Yongseok Koh
2019-03-07  7:41 ` [dpdk-dev] [PATCH 2/6] net/mlx5: fix external memory registration Yongseok Koh
2019-03-07  7:41 ` [dpdk-dev] [PATCH 3/6] net/mlx5: add control of excessive memory pinning by kernel Yongseok Koh
2019-03-07  7:41 ` [dpdk-dev] [PATCH 4/6] net/mlx5: enable secondary process to register DMA memory Yongseok Koh
2019-03-07  7:41 ` [dpdk-dev] [PATCH 5/6] net/mlx4: add control of excessive memory pinning by kernel Yongseok Koh
2019-03-07  7:41 ` [dpdk-dev] [PATCH 6/6] net/mlx4: enable secondary process to register DMA memory Yongseok Koh
2019-03-07  7:55 ` [dpdk-dev] [PATCH 0/6] net/mlx: " Yongseok Koh
2019-03-14 12:45 ` Shahaf Shuler
2019-03-14 12:45   ` Shahaf Shuler
2019-03-25 19:22 ` [dpdk-dev] [PATCH v2 " Yongseok Koh
2019-03-25 19:22   ` Yongseok Koh
2019-03-25 19:22   ` [dpdk-dev] [PATCH v2 1/6] net/mlx: remove debug messages on datapath Yongseok Koh
2019-03-25 19:22     ` Yongseok Koh
2019-03-25 19:22   ` [dpdk-dev] [PATCH v2 2/6] net/mlx5: fix external memory registration Yongseok Koh
2019-03-25 19:22     ` Yongseok Koh
2019-03-25 19:22   ` [dpdk-dev] [PATCH v2 3/6] net/mlx5: add control of excessive memory pinning by kernel Yongseok Koh
2019-03-25 19:22     ` Yongseok Koh
2019-03-25 19:22   ` [dpdk-dev] [PATCH v2 4/6] net/mlx5: enable secondary process to register DMA memory Yongseok Koh
2019-03-25 19:22     ` Yongseok Koh
2019-03-25 19:22   ` [dpdk-dev] [PATCH v2 5/6] net/mlx4: add control of excessive memory pinning by kernel Yongseok Koh
2019-03-25 19:22     ` Yongseok Koh
2019-03-25 19:22   ` [dpdk-dev] [PATCH v2 6/6] net/mlx4: enable secondary process to register DMA memory Yongseok Koh
2019-03-25 19:22     ` Yongseok Koh
2019-04-01 21:17 ` [dpdk-dev] [PATCH v3 0/6] net/mlx: " Yongseok Koh
2019-04-01 21:17   ` Yongseok Koh
2019-04-01 21:17   ` [dpdk-dev] [PATCH v3 1/6] net/mlx: remove debug messages on datapath Yongseok Koh
2019-04-01 21:17     ` Yongseok Koh
2019-04-01 21:17   ` [dpdk-dev] [PATCH v3 2/6] net/mlx5: fix external memory registration Yongseok Koh
2019-04-01 21:17     ` Yongseok Koh
2019-04-01 21:17   ` [dpdk-dev] [PATCH v3 3/6] net/mlx5: add control of excessive memory pinning by kernel Yongseok Koh
2019-04-01 21:17     ` Yongseok Koh
2019-04-01 21:17   ` [dpdk-dev] [PATCH v3 4/6] net/mlx5: enable secondary process to register DMA memory Yongseok Koh
2019-04-01 21:17     ` Yongseok Koh
2019-04-01 21:17   ` [dpdk-dev] [PATCH v3 5/6] net/mlx4: add control of excessive memory pinning by kernel Yongseok Koh
2019-04-01 21:17     ` Yongseok Koh
2019-05-14  4:52     ` Stephen Hemminger
2019-05-14  4:52       ` Stephen Hemminger
2019-05-14  4:54       ` Stephen Hemminger [this message]
2019-05-14  4:54         ` Stephen Hemminger
2019-04-01 21:17   ` [dpdk-dev] [PATCH v3 6/6] net/mlx4: enable secondary process to register DMA memory Yongseok Koh
2019-04-01 21:17     ` Yongseok Koh
2019-04-02  7:13   ` [dpdk-dev] [PATCH v3 0/6] net/mlx: " Shahaf Shuler
2019-04-02  7:13     ` Shahaf Shuler

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