Messages in this thread | | | Date | Mon, 14 Apr 2003 09:24:45 -0700 | From | "Martin J. Bligh" <> | Subject | Re: Quick question about hyper-threading (also some NUMA stuff) |
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>> > Perhaps it would be good to un-COW pages: >> > >> > 1. fork process >> > 2. if current node is not loaded, continue as usual >> > 3. if current node is loaded: >> > 3a. pick unloaded node >> > 4b. don't do COW for data pages, but simply copy them to node-local memory >> > >> > This way, read-write sharings would be replicated for each node. >> >> Sharing read-write stuff is a total nightmare - you have to deal with >> all the sync stuff, and invalidation. In real-life scenarios, I really >> doubt the complexity is worth it - read-only is quite complex enough, >> thanks ;-) > > I mean MAP_PRIVATE stuff, not MAP_SHARED.
OK, unless I misunderstand you, I think that happens naturally for that kind of thing - when we do the COW split, we'll get a node-local page by default (unless the local node is out of memory).
M.
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