Re: [PATCH 0/3] vmsplice: make vmsplice a trivial wrapper for preadv2/pwritev2
Herbert Xu <[email protected]> Wed, 10 Jun 2026 13:14:33 +0800
| 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 |
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| Message-ID | <[email protected]> |
Linus Torvalds <[email protected]> wrote: > > Nope. If your web server opens files with write access, I'd be > extremely surprised. > > And if you don't have write access, and you're sending out data from > files you opened just for reading - the onle sane case - you hit all > the existing problems with "I can certainly look up pages, but I damn > well shouldn't pass those pages to the networking code without copying > them". How about using write access as the gate to zero copy? IOW allow zero-copy if you already hold write access, otherwise perform a copy. Cheers, -- Email: Herbert Xu <[email protected]> Home Page: http://gondor.apana.org.au/~herbert/ PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt