Re: Unexpected splice "always copy" behavior observed

From: Miklos Szeredi
Date: Wed May 19 2010 - 11:29:23 EST

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.

To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at
Please read the FAQ at