Messages in this thread | | | From | Con Kolivas <> | Subject | Re: [ck] [PATCH] mm: implement swap prefetching (v26) | Date | Sat, 18 Feb 2006 01:26:57 +1100 |
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On Saturday 18 February 2006 01:18, Kevin Radloff wrote: > On 2/17/06, Con Kolivas <kernel@kolivas.org> wrote: > > Added disabling of swap prefetching when laptop_mode is enabled. > > Why bother with this? As someone commented in a previous thread, > wouldn't it be better to let the laptop_mode script handle it?
The discussion was about what size to make the swap prefetching. Since the size is not user tunable any more that is not the case. I had an offlist discussion with Bart Samwel about it and basically if your drive spins down at 5 seconds (which is what commonly happens with laptop mode) you will never have an opportunity to prefetch. This means swap prefetch will basically always spin up the drive nullifying laptop mode. On balance if you care about power more than anything to actually set laptop mode I suspect you wont want prefetch using any more power.
Cheers, Con - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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