Messages in this thread | | | Date | Fri, 11 Nov 2005 09:43:22 -0800 (PST) | From | Christoph Lameter <> | Subject | Re: [RFC, PATCH] Slab counter troubles with swap prefetch? |
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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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