linux-kernel - Re: [PATCH] mtd: revert "spi-nor: intel: provide a range for poll

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Message-ID: <159592990737.214287.1329265893720399161.b4-ty@microchip.com>
Date:   Tue, 28 Jul 2020 12:55:58 +0300
From:   Tudor Ambarus <tudor.ambarus@...rochip.com>
To:     Luis Alberto Herrera <luisalberto@...gle.com>
CC:     Tudor Ambarus <tudor.ambarus@...rochip.com>,
        Boris Brezillon <bbrezillon@...nel.org>,
        <linux-kernel@...r.kernel.org>, <linux-mtd@...ts.infradead.org>,
        Richard Weinberger <richard@....at>,
        "Miquel Raynal" <miquel.raynal@...tlin.com>,
        Jethro Beekman <jethro@...tanix.com>,
        Mika Westerberg <mika.westerberg@...ux.intel.com>,
        Vignesh Raghavendra <vigneshr@...com>
Subject: Re: [PATCH] mtd: revert "spi-nor: intel: provide a range for poll_timout"

On Wed, 10 Jun 2020 22:46:49 +0000, Luis Alberto Herrera wrote:
> This change reverts aba3a882a178: "mtd: spi-nor: intel: provide a range
> for poll_timout". That change introduces a performance regression when
> reading sequentially from flash. Logging calls to intel_spi_read without
> this change we get:
> 
> Start MTD read
> [   20.045527] intel_spi_read(from=1800000, len=400000)
> [   20.045527] intel_spi_read(from=1800000, len=400000)
> [  282.199274] intel_spi_read(from=1c00000, len=400000)
> [  282.199274] intel_spi_read(from=1c00000, len=400000)
> [  544.351528] intel_spi_read(from=2000000, len=400000)
> [  544.351528] intel_spi_read(from=2000000, len=400000)
> End MTD read
> 
> [...]

Applied to spi-nor/next, thanks!

[1/1] mtd: revert "spi-nor: intel: provide a range for poll_timout"
      https://git.kernel.org/mtd/c/e93a977367b2

Best regards,
-- 
Tudor Ambarus <tudor.ambarus@...rochip.com>