Messages in this thread |  | | Date | Thu, 26 Apr 2001 13:59:10 +0200 (CEST) | From | Mike Galbraith <> | Subject | Re: [patch] swap-speedup-2.4.3-B3 (fwd) |
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On Thu, 26 Apr 2001, Marcelo Tosatti wrote:
> On Thu, 26 Apr 2001, Mike Galbraith wrote: > > > > (i cannot see how this chunk affects the VM, AFAICS this too makes the > > > zapping of the cache less agressive.) > > > > (more folks get snagged on write.. they can't eat cache so fast) > > What about GFP_BUFFER allocations ? :) > > I suspect the jiffies hack is avoiding GFP_BUFFER allocations to eat cache > insanely.
(I think it's aging speed in general. If user tasks aren't doing it, kswapd is.)
> Easy way to confirm that: add the kswapd wait queue again and make > allocators which don't have __GFP_IO set wait on that in > try_to_free_pages().
I've tried not allowing those to enter try_to_free_pages() [nogo]. I'll try a waitqueue. wait_event(waitqueue_active(&kswapd_wait)) ok?
-Mike
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