From: Miquel Raynal <miquel.raynal@bootlin.com>
To: Vincent Whitchurch <vincent.whitchurch@axis.com>,
vigneshr@ti.com, richard@nod.at, miquel.raynal@bootlin.com,
joern@lazybastard.org
Cc: kernel@axis.com, linux-mtd@lists.infradead.org,
devicetree@vger.kernel.org, robh+dt@kernel.org,
krzk+dt@kernel.org, frowand.list@gmail.com,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH v3 4/4] mtd: phram: Allow cached mappings
Date: Thu, 21 Apr 2022 09:35:57 +0200 [thread overview]
Message-ID: <20220421073557.72082-1-miquel.raynal@bootlin.com> (raw)
In-Reply-To: <20220412135302.1682890-5-vincent.whitchurch@axis.com>
On Tue, 2022-04-12 at 13:53:02 UTC, Vincent Whitchurch wrote:
> Currently phram always uses ioremap(), but this is unnecessary when
> normal memory is used. If the reserved-memory node does not specify the
> no-map property, indicating it should be mapped as system RAM and
> ioremap() cannot be used on it, use a cached mapping using
> memremap(MEMREMAP_WB) instead.
>
> On one of my systems this improves read performance by ~70%.
>
> Signed-off-by: Vincent Whitchurch <vincent.whitchurch@axis.com>
> Reported-by: kernel test robot <lkp@intel.com>
Applied to https://git.kernel.org/pub/scm/linux/kernel/git/mtd/linux.git mtd/next, thanks.
Miquel
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Linux MTD discussion mailing list
http://lists.infradead.org/mailman/listinfo/linux-mtd/
WARNING: multiple messages have this Message-ID (diff)
From: Miquel Raynal <miquel.raynal@bootlin.com>
To: Vincent Whitchurch <vincent.whitchurch@axis.com>,
vigneshr@ti.com, richard@nod.at, miquel.raynal@bootlin.com,
joern@lazybastard.org
Cc: kernel@axis.com, linux-mtd@lists.infradead.org,
devicetree@vger.kernel.org, robh+dt@kernel.org,
krzk+dt@kernel.org, frowand.list@gmail.com,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH v3 4/4] mtd: phram: Allow cached mappings
Date: Thu, 21 Apr 2022 09:35:57 +0200 [thread overview]
Message-ID: <20220421073557.72082-1-miquel.raynal@bootlin.com> (raw)
In-Reply-To: <20220412135302.1682890-5-vincent.whitchurch@axis.com>
On Tue, 2022-04-12 at 13:53:02 UTC, Vincent Whitchurch wrote:
> Currently phram always uses ioremap(), but this is unnecessary when
> normal memory is used. If the reserved-memory node does not specify the
> no-map property, indicating it should be mapped as system RAM and
> ioremap() cannot be used on it, use a cached mapping using
> memremap(MEMREMAP_WB) instead.
>
> On one of my systems this improves read performance by ~70%.
>
> Signed-off-by: Vincent Whitchurch <vincent.whitchurch@axis.com>
> Reported-by: kernel test robot <lkp@intel.com>
Applied to https://git.kernel.org/pub/scm/linux/kernel/git/mtd/linux.git mtd/next, thanks.
Miquel
next prev parent reply other threads:[~2022-04-21 7:36 UTC|newest]
Thread overview: 36+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-04-12 13:52 [PATCH v3 0/4] mtd: phram improvements Vincent Whitchurch
2022-04-12 13:52 ` Vincent Whitchurch
2022-04-12 13:52 ` [PATCH v3 1/4] mtd: core: Check devicetree alias for index Vincent Whitchurch
2022-04-12 13:52 ` Vincent Whitchurch
2022-04-21 7:36 ` Miquel Raynal
2022-04-21 7:36 ` Miquel Raynal
2022-04-12 13:53 ` [PATCH v3 2/4] dt-bindings: reserved-memory: Support MTD/block device Vincent Whitchurch
2022-04-12 13:53 ` Vincent Whitchurch
2022-04-14 16:00 ` Rob Herring
2022-04-14 16:00 ` Rob Herring
2022-04-21 7:36 ` Miquel Raynal
2022-04-21 7:36 ` Miquel Raynal
2022-04-12 13:53 ` [PATCH v3 3/4] mtd: phram: Allow probing via reserved-memory Vincent Whitchurch
2022-04-12 13:53 ` Vincent Whitchurch
2022-04-14 16:02 ` Rob Herring
2022-04-14 16:02 ` Rob Herring
2022-04-21 7:36 ` Miquel Raynal
2022-04-21 7:36 ` Miquel Raynal
2022-04-12 13:53 ` [PATCH v3 4/4] mtd: phram: Allow cached mappings Vincent Whitchurch
2022-04-12 13:53 ` Vincent Whitchurch
2022-04-13 6:45 ` kernel test robot
2022-04-13 6:45 ` kernel test robot
2022-04-14 9:04 ` Vincent Whitchurch
2022-04-14 9:04 ` Vincent Whitchurch
2022-04-14 9:04 ` Vincent Whitchurch
2022-04-25 8:28 ` Miquel Raynal
2022-04-25 8:28 ` Miquel Raynal
2022-04-25 8:28 ` Miquel Raynal
2022-04-25 8:30 ` Miquel Raynal
2022-04-25 8:30 ` Miquel Raynal
2022-04-25 8:30 ` Miquel Raynal
2022-05-10 15:26 ` Vincent Whitchurch
2022-05-10 15:26 ` Vincent Whitchurch
2022-05-10 15:26 ` Vincent Whitchurch
2022-04-21 7:35 ` Miquel Raynal [this message]
2022-04-21 7:35 ` Miquel Raynal
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