[Ocfs2-devel] [PATCH 1/3] fs: Document the reflink(2) system call.

[Jörn Engel]

On Tue, 5 May 2009 18:46:19 +0200, Jörn Engel wrote:
> 
> And depending on the fs design, the read/write loop can be
> replaced with finer-grained reference counting.

And maybe finer-grained reference counting should be a requirement for
copyfile/cowlink/reflink or whatever we call it.  With a large file on
slow media, open("foo", O_RDWR); should still return in a reasonable
amount of time.  Not after ten minutes.

Jörn

-- 
Fancy algorithms are slow when n is small, and n is usually small.
Fancy algorithms have big constants. Until you know that n is
frequently going to be big, don't get fancy.
-- Rob Pike