Re: 'cp file1 file2' takes 2x`sizeof(file)` cache (2.3.99-pre9-2)

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On Tue, 16 May 2000 iafilius@xs4all.nl wrote:

> Just noticed while copying a (large/tested with 60MB) file it
> takes about twice the file's size in cache (which takes it from
> free memory).
>
> This must be because kernel doesn't know about the same files,
> and caches them separate.

But they _are_ not the same files. If you wanted them to stay
the same file, you would have linked them instead of copying...

> But it _is_ waste of memory isn't ?

Not really. They are two different files, after all...
(and COW caching really wouldn't be worth the complexity)

regards,

Rik

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