On Tue, 16 Jan 2007, Peter Zijlstra wrote:
> > B. We add a new counter NR_UNRECLAIMABLE that is subtracted
> > from the available pages in a node. This allows us to
> > accurately calculate the dirty ratio even if large portions
> > of the node have been allocated for huge pages or for
> > slab pages.
>
> What about mlock'ed pages?
mlocked pages can be dirty and written back right? So for the
dirty ratio calculation they do not play a role. We may need a
separate counter for mlocked pages if they are to be considered
for other decisions in the VM.
> Otherwise it all looks good.
>
> Acked-by: Peter Zijlstra <[email protected]>
Thanks.
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