On Fri, 11 Nov 2005, Con Kolivas wrote:
> One last thing. Swap prefetch works off the accounting of total memory and is
> only a single kernel thread rather than a thread per cpu or per pgdat unlike
> kswapd. Currently it just cares about total slab data and total ram.
> Depending on where this thread is scheduled (which node) your accounting
> change will alter the behaviour of it. Does this affect the relevance of this
> patch to you?
Yes, if its a truly global value then we would not need the patch.
But then the prefetch code would have to add up all the nr_slab field for
all processors and use that result for comparison. If you do this in a
node specific fashion then the problem comes up again.
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