linux-kernel - Re: [PATCH v21 08/30] splice: Make splice from a DAX file use copy_splice

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Message-ID: <d4ed0a75-f71c-ef42-7845-c1fa78b36fa7@linux.alibaba.com>
Date:   Sun, 21 May 2023 22:55:25 +0800
From:   Gao Xiang <hsiangkao@...ux.alibaba.com>
To:     David Howells <dhowells@...hat.com>, Jens Axboe <axboe@...nel.dk>,
        Al Viro <viro@...iv.linux.org.uk>,
        Christoph Hellwig <hch@...radead.org>
Cc:     linux-erofs@...ts.ozlabs.org, linux-block@...r.kernel.org,
        Hillf Danton <hdanton@...a.com>, Jan Kara <jack@...e.cz>,
        linux-xfs@...r.kernel.org, David Hildenbrand <david@...hat.com>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        Jeff Layton <jlayton@...nel.org>,
        Christian Brauner <brauner@...nel.org>,
        Matthew Wilcox <willy@...radead.org>,
        linux-kernel@...r.kernel.org, linux-mm@...ck.org,
        Jason Gunthorpe <jgg@...dia.com>,
        linux-fsdevel@...r.kernel.org, linux-ext4@...r.kernel.org,
        Logan Gunthorpe <logang@...tatee.com>,
        Christoph Hellwig <hch@....de>
Subject: Re: [PATCH v21 08/30] splice: Make splice from a DAX file use
 copy_splice_read()



On 2023/5/20 17:00, David Howells wrote:
> Make a read splice from a DAX file go directly to copy_splice_read() to do
> the reading as filemap_splice_read() is unlikely to find any pagecache to
> splice.
> 
> I think this affects only erofs, Ext2, Ext4, fuse and XFS.
> 
> Signed-off-by: David Howells <dhowells@...hat.com>
> cc: Christoph Hellwig <hch@....de>
> cc: Al Viro <viro@...iv.linux.org.uk>
> cc: Jens Axboe <axboe@...nel.dk>
> cc: linux-erofs@...ts.ozlabs.org
> cc: linux-ext4@...r.kernel.org
> cc: linux-xfs@...r.kernel.org
> cc: linux-fsdevel@...r.kernel.org
> cc: linux-block@...r.kernel.org
> cc: linux-mm@...ck.org

Reviewed-by: Gao Xiang <hsiangkao@...ux.alibaba.com>

Thanks,
Gao Xiang