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    SubjectRe: [PATCH] mm: Enable MAP_UNINITIALIZED for archs with mmu
    On Thu, 23 Feb 2012 10:42:16 -0800
    Arun Sharma <> wrote:

    > Hi Balbir,
    > Thanks for reviewing. Would you change your position if I limit the
    > scope of the patch to a cgroup with a single address space?
    > The moment the cgroup sees more than one address space (either due to
    > tasks getting created or being added), this optimization would be turned
    > off.
    > More details below:
    > On 2/22/12 11:45 PM, Balbir Singh wrote:
    > >
    > > So the assumption is that only apps that have access to each others
    > > VMA's will run in this cgroup?
    > >
    > In a distributed computing environment, a user submits a job to the
    > cluster job scheduler. The job might involve multiple related
    > executables and might involve multiple address spaces. But they're
    > performing one logical task, have a single resource limit enforced by a
    > cgroup.
    > They don't have access to each other's VMAs, but if "accidentally" one
    > of them comes across an uninitialized page with data from another task,
    > it's not a violation of the security model.
    How do you handle shared resouce, file-cache ?


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