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    SubjectRe: 2.6.36 io bring the system to its knees
    On 2010-11-06 15:10, dave b wrote:
    > I now personally have thought that this problem is the kernel not
    > keeping track of reads vs writers properly or not providing enough
    > time to reading processes as writing ones which look like they are
    > blocking the system....
    >
    > If you want to do a simple test do an unlimited dd (or two dd's of a
    > limited size, say 10gb) and a find /
    > Tell me how it goes :) ( the system will stall)
    > (obviously stop the dd after some time :) ).
    >
    > http://article.gmane.org/gmane.linux.kernel.device-mapper.dm-crypt/4561
    > iirc can reproduce this on plain ext3.

    As already mentioned, ext3 is just not a good choice for this sort of
    thing. Did you have atimes enabled?

    --
    Jens Axboe



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