On Wed, Jan 07, 2004, Poul-Henning Kamp wrote: > One of the assumptions I made ten years ago, was that we would expose > more of the possible VM gymnastics to userland and in particular it > was my expectation that it would be cheap for a process to do some > sort of page-flipping or page-exchange. > > This has not materialized in the meantime, and VMwizards have > generally been a lot less than enthusiastic about it when I have > tried to coax them into providing this sort of thing. > > The result is that applications which use realloc() a lot suffer. FWIW, you can do the required gymnastics with mmap() as long as the mapped region is backed by a file. There were some discussions about a year ago about how to extend that idea to swap-backed storage. As I recall, both dillon and wollman wanted it to happen but disagreed about the API, so one nasty bikeshed later, it all evaporated.Received on Wed Jan 07 2004 - 19:28:19 UTC
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