> > (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.
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().
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