On Sun, 2006-02-05 at 22:14 +0100, Jan Engelhardt wrote: > >> > > >> > Mmm.. bad idea. As much as I'd like the default to be 3GB_OPT, that would > >> > be a big impact to userspace, and there's no point in breaking everyone's > >> > machines when advanced users can just reconfig/recompile to get what they want. > >> > > >> What userspace programs do depend on it? > > > >there is a lot of userspace that assumes they can do 2Gb or even close > >to 3Gb of memory allocations. Databases, java, basically anything with > >threads. Sure for most of these its a configuration option to reduce > >this, but that still doesn't mean it's a good idea to change from the > >existing behavior... > > > Not to mention that these (almost(*)) fail anyway when you have less than 2 > GB of RAM. it's not really overcommit... it can also be file mmaps or shared mmaps of say tmpfs files (the later is common with oracle actually) - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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