Messages in this thread |  | | | From | Daniel Phillips <> | | Subject | Re: [RFC] Arch option to touch newly allocated pages | | Date | Wed, 6 Mar 2002 15:59:22 +0100 |
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On March 5, 2002 07:30 pm, Benjamin LaHaise wrote: > On Tue, Mar 05, 2002 at 01:12:19PM -0500, Jeff Dike wrote: > > Really? And you're unconcerned about the impact on the rest of the system > > of a UML grabbing (say) 128M of memory when it starts up? Especially if it > > may never use it? > > Honestly, I think that most people want to know if the system they've setup > is overcommited at as early a point as possible: a UML failing at startup > with out of memory is better than random segvs at some later point when the > system is under load. Refer to the principle of least surprise. And if the > user truely wants to disable that, well, you can give them a command line > option to shoot themselves in the foot with.
Suppose you have 512 MB memory and an equal amount of swap. You start 8 umls with 64 MB each. With your and Peter's suggestion, the system always goes into swap. Whereas if the memory is only allocated on demand it probably doesn't.
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