Messages in this thread | | | Date | Mon, 25 Oct 2004 16:25:21 +0100 | From | Christoph Hellwig <> | Subject | Re: [PATCH 13/28] VFS: Introduce soft reference counts |
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On Mon, Oct 25, 2004 at 10:45:03AM -0400, Mike Waychison wrote: > This patch introduces the concept of a 'soft' reference count for a vfsmount. > This type of reference count allows for references to be held on mountpoints > that do not affect their busy states for userland unmounting. Some might > argue that this is wrong because 'when I unmount a filesystem, I want the > resources associated with it to go away too', but this way of thinking was > deprecated with the addition of namespaces and --bind back in the 2.4 series. > > A future addition may see a callback mechanism so that in kernel users can > use a given mountpoint and have it deregistered some way (quota and > accounting come to mind). > > These soft reference counts are used by a later patch that adds an interface > for holding and manipulating mountpoints using filedescriptors.
You haven't explained why you actually need it, though.
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