Re: [PATCH 0/3] vmsplice: make vmsplice a trivial wrapper for preadv2/pwritev2

Linus Torvalds <[email protected]> Wed, 3 Jun 2026 14:38:34 -0700

Newsgroups	org.kernel.vger.linux-api,dev.linux.lists.patches,org.kernel.vger.linux-fsdevel,org.kernel.vger.linux-kernel,org.kernel.vger.netdev,org.kvack.linux-mm
Message-ID	<CAHk-=wha=LtAq8y-B4j9ps1g_qv3CK0LrHdHEVxP_52p-m=NZA@mail.gmail.com>

On Wed, 3 Jun 2026 at 14:36, Linus Torvalds
<[email protected]> wrote:
>
> It was just the filesystem side that basically now instead of exposing
> the page cache directly (with filemap_splice_read) now only exposed a
> *copy* of the page cache (with copy_splice_read).

... and let me note that UNTESTED part again.

The patch looked "ObviouslyCorrect(tm)" to me, and I did actually
compile-test it too.

So it probably wasn't _complete_ crap.

But I never even booted it, and if I had, I wouldn't have had any
loads that uses splice (or sendfile) anyway.

So caveat emptor.

              Linus