Zhihui Zhang wrote:
> Is there any fundamental reason why a page can not be owned by more than
> one VM object?  If that was the case, the bogus page stuff in vfs_bio.c
> could be made cleaner IMHO.

When you need to reclaim the page, you would have to identify
all owners, rather than a single owner.  THis converts the
lookup fron an O(1) to an O(N) problem.

Keeping a linked list of owners doesn't really help, either,
since it introduces locking issues that will cause -current
to blow chunks.

-- Terry

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