Messages in this thread | | | From | Al Boldi <> | Subject | Re: [RFC] VM: I have a dream... | Date | Thu, 2 Feb 2006 21:59:04 +0300 |
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Alan Cox wrote: > On Maw, 2006-01-31 at 18:56 +0300, Al Boldi wrote: > > So with 64bits widely available now, and to let Linux spread its wings > > and really fly, how could tmpfs merged w/ swap be tweaked to provide > > direct mapped access into this linear address space? > > Why bother. You can already create a private large file and mmap it if > you want to do this, and you will get better performance than being > smeared around swap with everyone else. > > Currently swap means your data is mixed in with other stuff. Swap could > do preallocation of each vma when running in limited overcommit modes > and it would run a lot faster if you did but you would pay a lot in > flexibility and efficiency, as well as needing a lot more swap. > > Far better to let applications wanting to work this way do it > themselves. Just mmap and the cache balancing and pager will do the rest > for you.
So w/ 1GB RAM, no swap, and 1TB disk mmap'd, could this mmap'd space be added to the total memory available to the OS, as is done w/ swap?
And if that's possible, why not replace swap w/ mmap'd disk-space?
Thanks!
-- Al
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