Re: [PATCH v21 22/30] ocfs2: Provide a splice-read stub

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To: Joseph Qi <joseph.qi@xxxxxxxxxxxxxxxxx>
Subject: Re: [PATCH v21 22/30] ocfs2: Provide a splice-read stub
From: David Howells <dhowells@xxxxxxxxxx>
Date: Mon, 22 May 2023 07:28:36 +0100
Cc: dhowells@xxxxxxxxxx, Jens Axboe <axboe@xxxxxxxxx>, Al Viro <viro@xxxxxxxxxxxxxxxxxx>, Christoph Hellwig <hch@xxxxxxxxxxxxx>, Matthew Wilcox <willy@xxxxxxxxxxxxx>, Jan Kara <jack@xxxxxxx>, Jeff Layton <jlayton@xxxxxxxxxx>, David Hildenbrand <david@xxxxxxxxxx>, Jason Gunthorpe <jgg@xxxxxxxxxx>, Logan Gunthorpe <logang@xxxxxxxxxxxx>, Hillf Danton <hdanton@xxxxxxxx>, Christian Brauner <brauner@xxxxxxxxxx>, Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>, linux-fsdevel@xxxxxxxxxxxxxxx, linux-block@xxxxxxxxxxxxxxx, linux-kernel@xxxxxxxxxxxxxxx, linux-mm@xxxxxxxxx, Christoph Hellwig <hch@xxxxxx>, Mark Fasheh <mark@xxxxxxxxxx>, Joel Becker <jlbec@xxxxxxxxxxxx>, ocfs2-devel@xxxxxxxxxxxxxx
In-reply-to: <376ab23b-52d0-d7fd-2dd9-414cbb474e01@linux.alibaba.com>
Organization: Red Hat UK Ltd. Registered Address: Red Hat UK Ltd, Amberley Place, 107-111 Peascod Street, Windsor, Berkshire, SI4 1TE, United Kingdom. Registered in England and Wales under Company Registration No. 3798903
References: <376ab23b-52d0-d7fd-2dd9-414cbb474e01@linux.alibaba.com> <20230520000049.2226926-1-dhowells@redhat.com> <20230520000049.2226926-23-dhowells@redhat.com>

Joseph Qi <joseph.qi@xxxxxxxxxxxxxxxxx> wrote:

> Don't see direct IO logic now. Am I missing something?

See that patch description ;-)

    Provide a splice_read stub for ocfs2.  This emits trace lines and does an
    atime lock/update before calling filemap_splice_read().  Splicing from
    direct I/O is handled by the caller.

David

Follow-Ups:
- Re: [PATCH v21 22/30] ocfs2: Provide a splice-read stub
  - From: Joseph Qi

References:
- Re: [PATCH v21 22/30] ocfs2: Provide a splice-read stub
  - From: Joseph Qi
- [PATCH v21 00/30] splice: Kill ITER_PIPE
  - From: David Howells
- [PATCH v21 22/30] ocfs2: Provide a splice-read stub
  - From: David Howells

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