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    SubjectRe: [PATCH 3/6] shm: add memfd_create() syscall
    On Wed, Mar 19, 2014 at 08:06:48PM +0100, David Herrmann wrote:
    > memfd_create() is similar to mmap(MAP_ANON), but returns a file-descriptor
    > that you can pass to mmap(). It explicitly allows sealing and
    > avoids any connection to user-visible mount-points. Thus, it's not
    > subject to quotas on mounted file-systems, but can be used like
    > malloc()'ed memory, but with a file-descriptor to it.
    >
    > memfd_create() does not create a front-FD, but instead returns the raw
    > shmem file, so calls like ftruncate() can be used. Also calls like fstat()
    > will return proper information and mark the file as regular file. Sealing
    > is explicitly supported on memfds.
    >
    > Compared to O_TMPFILE, it does not require a tmpfs mount-point and is not
    > subject to quotas and alike.

    If I'm not mistaken in something obvious, this looks similar to /proc/pid/map_files
    feature, Pavel?


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