Re: Populating multiple ptes at fault time

[Chris Snook]

Christoph Lameter wrote:
> Martin Bligh wrote:
> > > My patches were only for anonymous pages not for file backed because readahead
> > > is available for file backed mappings.
> > Do we populate the PTEs though? I didn't think that was batched, but I
> > might well be wrong.
>
> We do not populate the PTEs and AFAICT PTE population was assumed not to be
> performance critical since the backing media is comparatively slow.

Perhaps we should.  In a virtual guest, the backing media is often an emulated 
IDE device, or something similarly inefficient, such that the bottleneck is the CPU.

-- Chris
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