Messages in this thread | | | Subject | Re: RFC [patch 13/34] PID Virtualization Define new task_pid api | From | Trond Myklebust <> | Date | Wed, 25 Jan 2006 10:10:11 -0500 |
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On Wed, 2006-01-25 at 02:58 -0700, Eric W. Biederman wrote: > >> On Maw, 2006-01-24 at 12:26 -0700, Eric W. Biederman wrote: > >> > There is at least NFS lockd that appreciates having a single integer > >> > per process unique identifier. So there is a practical basis for > >> > wanting such a thing.
The NFS lock manager mainly wants a unique 32-bit identifier that can follow clone(CLONE_FILES). The reason is that the Linux VFS is forced to use the pointer to the file table as the "process identifier" for posix locks (i.e. fcntl() locks).
Cheers, Trond
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