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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,
> [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 ;-(


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