Messages in this thread | | | Date | Thu, 18 Sep 2008 18:23:03 -0400 | From | Chris Snook <> | Subject | Re: Populating multiple ptes at fault time |
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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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