linux-kernel - Re: [PATCH v14 08/17] splice: Do splice read from a file without using ITER

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Message-ID: <654865.1676668613@warthog.procyon.org.uk>
Date:   Fri, 17 Feb 2023 21:16:53 +0000
From:   David Howells <dhowells@...hat.com>
To:     Alexander Egorenkov <egorenar@...ux.ibm.com>
Cc:     dhowells@...hat.com, axboe@...nel.dk, david@...hat.com,
        hch@...radead.org, hch@....de, hdanton@...a.com, jack@...e.cz,
        jgg@...dia.com, jhubbard@...dia.com, jlayton@...nel.org,
        linux-block@...r.kernel.org, linux-fsdevel@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-mm@...ck.org,
        logang@...tatee.com, viro@...iv.linux.org.uk, willy@...radead.org,
        Marc Hartmayer <mhartmay@...ux.ibm.com>
Subject: Re: [PATCH v14 08/17] splice: Do splice read from a file without using ITER_PIPE

Alexander Egorenkov <egorenar@...ux.ibm.com> wrote:

> Subject: Re: [PATCH v14 08/17] splice: Do splice read from a file without
>  using ITER_PIPE

Well, I can reproduce it.  Putting a printks in generic_file_splice_read(),
direct_splice_read() and filemap_splice_read(), however, seems to show that it
isn't using any of those functions; nor can I see any sign of a splice syscall
in a strace:-/

David