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    SubjectRe: [PATCH] laptop mode
    Linux Kernel Mailing List wrote:
    > ChangeSet 1.1150.1.52, 2003/10/08 10:49:45-03:00, axboe@suse.de
    >
    > [PATCH] laptop mode
    >
    > Hi Marcelo,
    >
    > Lots of people have been using this patch with great success, and it's
    > been in the SuSE kernel for some months now too. It is also in the -benh
    > ppc tree
    >
    > Basically, it introduces a write back mode of dirty and journal data
    > that is more suitable for laptops. At the block layer end, it schedules
    > write out of dirty data after the disk has been idle for 5 seconds.
    >
    > Laptop mode can be switched on and off with /proc/sys/vm/laptop_mode.
    > There is also a block_dump sysctl, which if enabled will dump who
    > dirties and writes out data. This is very helpful in pinning down who is
    > causing unnecessary writes to the disk.

    Red Hat just dropped this patch since it was suspected of data
    corruption ;-(

    Jeff



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