Messages in this thread | | | Date | Tue, 22 Oct 2002 09:14:41 -0700 | From | "Martin J. Bligh" <> | Subject | Re: [PATCH 2.5.43-mm2] New shared page table patch |
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> Actually, per-object reverse mappings are nowhere near as good > a solution as shared page tables. At least, not from the points > of view of space consumption and the overhead of tearing down > the mappings at pageout time. > > Per-object reverse mappings are better for fork+exec+exit speed, > though. > > It's a tradeoff: do we care more for a linear speedup of fork(), > exec() and exit() than we care about a possibly exponential > slowdown of the pageout code ?
As long as the box doesn't fall flat on it's face in a jibbering heap, that's the first order of priority ... ie I don't care much for now ;-)
M.
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