Re: Unexpected splice "always copy" behavior observed

[Miklos Szeredi]

On Wed, 19 May 2010, Linus Torvalds wrote:
> The real limitation is likely always going to be the fact that it has to 
> be page-aligned and a full page. For a lot of splice inputs, that simply 
> won't be the case, and you'll end up copying for alignment reasons anyway.

Another limitation I found while splicing from one file to another is
that stealing from the source file's page cache does not always
succeed.  This turned out to be because of a reference from the lru
cache for freshly read pages.  I'm not sure how this could be fixed.

Miklos
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