On Mon, 16 Apr 2007, David Rientjes wrote:
>
> > Compromise patch below: would that be satisfactory to you, David?
>
> I really like the patch, but for perhaps a slightly different reason:
> we're only flushing ranges that have been shown to need it. We aren't
> completely flushing the entire mm which is likely to be excessive in
> situations where we're actually using /proc/pid/clear_refs in combination
> with /proc/pid/smaps for memory footprint approximation (i.e. it's on a
> fine granularity).
It would be more of a reason to like the patch, if more architectures
actually implemented flush_tlb_range as anything different from
flush_tlb_mm ;) Sadly, few can do better than flush_tlb_mm: ia64
is the exception I remember, and maybe a couple of others. I put
flush_tlb_range there merely because it seems more appropriate,
but it's rather deceptive.
Hugh
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