Messages in this thread | | | Date | Thu, 09 Oct 2003 10:18:15 -0400 | From | Jeff Garzik <> | Subject | Re: [PATCH] laptop mode |
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Jens Axboe wrote: > On Thu, Oct 09 2003, Marcelo Tosatti wrote: > >> >>On Thu, 9 Oct 2003, Jeff Garzik wrote: >> >> >>>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 ;-( >> >>Uh, oh... Jens? > > > See my previous mail. I don't see any problems with it, and I've > certainly not heard of (or experienced myself) problems with the patch. > I'm waiting for Jeff to expand on his mail, surely he/RH must know more > about this issue.
That's 100% of my knowledge. Talk to arjan/davej/sct for more info...
That's what RH's field testing showed us, ignore it if you wish... :)
Jeff
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