linux-kernel - Re: copy on write for splice() from file to pipe?

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Message-ID: <Y+oDJR03MjoQJsNJ@gondor.apana.org.au>
Date:   Mon, 13 Feb 2023 17:30:13 +0800
From:   Herbert Xu <herbert@...dor.apana.org.au>
To:     David Laight <David.Laight@...lab.com>
Cc:     torvalds@...ux-foundation.org, david@...morbit.com,
        metze@...ba.org, axboe@...nel.dk, linux-fsdevel@...r.kernel.org,
        linux-api@...r.kernel.org, io-uring@...r.kernel.org,
        linux-kernel@...r.kernel.org, viro@...iv.linux.org.uk,
        samba-technical@...ts.samba.org
Subject: Re: copy on write for splice() from file to pipe?

David Laight <David.Laight@...lab.com> wrote:
>
> It is also worth remembering that TCP needs to be able
> to retransmit the data and a much later time.
> So the application must not change the data until it has
> been acked by the remote system.

I don't believe changing the data on retransmit violates any
standards.  Correct me if I'm wrong :)
-- 
Email: Herbert Xu <herbert@...dor.apana.org.au>
Home Page: http://gondor.apana.org.au/~herbert/
PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt