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    SubjectRe: [RFC] Arch option to touch newly allocated pages
    On Thu, Mar 07, 2002 at 12:14:15AM +0100, Daniel Phillips wrote:
    > On March 6, 2002 05:36 pm, Benjamin LaHaise wrote:
    > > On Wed, Mar 06, 2002 at 04:24:17PM +0100, Daniel Phillips wrote:
    > > > On March 6, 2002 04:24 pm, Benjamin LaHaise wrote:
    > > > > On Wed, Mar 06, 2002 at 03:59:22PM +0100, Daniel Phillips wrote:
    > > > > > 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.
    > > > >
    > > > > As I said previously, going into swap is preferable over randomly killing
    > > > > new tasks under heavy load.
    > > >
    > > > Huh? In the example I gave, you will never oom but with your suggestion, you
    > > > will always go needlessly go into swap. I'm suprised that you and Peter are
    > > > aguing in favor of wasting resources.
    > >
    > > I'm arguing in favour of predictable behaviour. Stability and reliability
    > > are more important than a bit of swap space.
    >
    > That's the same argument that says memory overcommit should not be allowed.

    Go back in the thread: I suggested making it an option that the user has to
    turn on to allow his foot to be shot. Remember: the common case in the kernel
    is to be using all memory.

    -ben
    --
    "A man with a bass just walked in,
    and he's putting it down
    on the floor."
    -
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