Messages in this thread | | | From | Con Kolivas <> | Subject | Re: [ck] Re: Swap prefetch merge plans | Date | Sat, 10 Feb 2007 07:50:22 +1100 |
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On Saturday 10 February 2007 07:30, Andrew Morton wrote: > On Fri, 09 Feb 2007 14:13:03 +0100 > > jos poortvliet <jos@mijnkamer.nl> wrote: > > Nick's comment, replying to me some time ago: > > I think I was thinking of this: > > http://lkml.org/lkml/2006/2/6/509
Fortunately that predates a lot of changes where I did address all those. These will seem out of context without looking at that original email so I apologise in advance.
buffered_rmqueue and prefetching x86 specific (not into DMA) were dropped
It is NUMA aware
Global cacheline bouncing in page allocation and page reclaim paths I have no answer for as I have to tell swap prefetch that the vm is busy somehow and I do that by setting precisely one bit in a lockless manner.
The trylocks were dropped.
The other ideas were to : -extend the prefetching. That's extra features -knowing for sure when a system is really idle. I've tried hard to do that as cheaply as possible. -putting pages on the lru? well it puts them on the tail -papering over an issue? As I said, no matter how good the vm is, there will always be loads that swap.
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