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SubjectRe: [PATCH] mm: Implement swap prefetching tweaks
On Sat, 2006-03-11 at 08:51 +0100, Mike Galbraith wrote:
> There used to be a pages in flight 'restrictor plate' in there that
> would have probably helped this situation at least a little. But in
> any case, it sounds like you'll have to find a way to submit the IO in
> itty bitty synchronous pieces.

echo 64 > /sys/block/hd*/queue/max_sectors_kb
There is basically a straight linear relation between whatever you set
this to and the maximum scheduling latency you see. It was developed to
solve the exact problem you are describing.


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