FS performance with SD/MMC card - Kernel

This is a discussion on FS performance with SD/MMC card - Kernel ; Hi, Someone has asked how fast can a linux FS write to a SD/MMC card? Answer to this will help make a product decision. Kallol Biswas NucleoDyne Systems, Inc. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" ...

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Thread: FS performance with SD/MMC card

  1. FS performance with SD/MMC card

    Hi,
    Someone has asked how fast can a linux FS write to a SD/MMC card?

    Answer to this will help make a product decision.


    Kallol Biswas
    NucleoDyne Systems, Inc.
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  2. Re: FS performance with SD/MMC card

    Hi,

    Take a look at:

    http://intr.overt.org/blog/?p=66

    The problem he mentions is due to dynamic cpu speed scaling to save power. When its disabled 12.9M/s comes back...

    The support for high speed is in the stock linux kernel. Nokia's kernel drops it since some of the HW
    they use for the SD card support has problems with the high speed...

    Thanks
    Ed

    On April 28, 2008, Kallol Biswas wrote:

    > Hi,
    > Someone has asked how fast can a linux FS write to a SD/MMC card?
    >
    > Answer to this will help make a product decision.
    >
    >
    > Kallol Biswas
    > NucleoDyne Systems, Inc.
    > --
    > To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
    > the body of a message to majordomo@vger.kernel.org
    > More majordomo info at http://vger.kernel.org/majordomo-info.html
    > Please read the FAQ at http://www.tux.org/lkml/
    >
    >



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