Messages in this thread | | | Subject | Re: [PATCH] mm: MADV_WILLNEED implementation for anonymous memory | From | Andi Kleen <> | Date | Thu, 31 Jan 2008 11:15:08 +0100 |
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Peter Zijlstra <a.p.zijlstra@chello.nl> writes: > > Ah, that is Lennarts Pulse Audio thing, he has samples in memory which > might not have been used for a while, and he wants to be able to > pre-fetch those when he suspects they might need to be played. So that > once the audio thread comes along and stuffs them down /dev/dsp its all > nice in memory.
The real problem that seems to make swapping so slow is that the data tends to be badly fragmented on the swap partition. I suspect if that problem was attached the need for such prefetching would be far less because swap in would be much faster.
-Andi
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