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    SubjectChange in default vm_dirty_ratio
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    Andrew,

    The default vm_dirty_ratio changed from 40 to 10
    for the 2.6.22-rc kernels in this patch:

    http://git.kernel.org/?
    p=linux/kernel/git/torvalds/linux-2.6.git;a=commitdiff;h=07db59bd6b0f279c31044cba6787344f63be87ea;hp=de46c33745f5e2ad594c72f2cf5f490861b16ce1

    IOZone write drops by about 60% when test file size is 50 percent of
    memory. Rand-write drops by 90%.

    Is there a good reason for turning down the default dirty ratio?
    How will it help for most cases? Intuitively, it seems like
    a less aggressive writeback will have better performance.

    Thanks.

    Tim
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