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SubjectRe: [PATCH 2/2] proc: Usable inode numbers for the namespace file descriptors.
From: (Eric W. Biederman)
Date: Fri, 17 Jun 2011 16:33:19 -0700

> Assign a unique proc inode to each namespace, yielding an
> identifier that userspace can use for identifying a namespace.
> This has been a long requested feature and only blocked because
> a naive implementation would put the id in a global space and
> would ultimately require having a namespace for the names of
> namespaces, making migration and certain virtualization tricks
> impossible.
> We still don't have per superblock inode numbers for proc, which
> appears necessary for application unaware checkpoint/restart and
> migrations (if the application is using namespace filedescriptors)
> but that is now allowd by the design if it becomes important.
> I have preallocated the ipc and uts initial proc inode numbers so
> their structures can be statically initialized.
> Signed-off-by: Eric W. Biederman <>

For networking bits:

Acked-by: David S. Miller <>

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