linux-ext4 - Re: [PATCH v2 02/18] fsdax: Use dax_page_idle() to document DAX busy page checking

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Date:   Tue, 20 Sep 2022 11:31:45 -0300
From:   Jason Gunthorpe <jgg@...dia.com>
To:     Dan Williams <dan.j.williams@...el.com>
Cc:     akpm@...ux-foundation.org, Matthew Wilcox <willy@...radead.org>,
        Jan Kara <jack@...e.cz>, "Darrick J. Wong" <djwong@...nel.org>,
        Christoph Hellwig <hch@....de>,
        John Hubbard <jhubbard@...dia.com>,
        linux-fsdevel@...r.kernel.org, nvdimm@...ts.linux.dev,
        linux-xfs@...r.kernel.org, linux-mm@...ck.org,
        linux-ext4@...r.kernel.org
Subject: Re: [PATCH v2 02/18] fsdax: Use dax_page_idle() to document DAX busy
 page checking

On Thu, Sep 15, 2022 at 08:35:21PM -0700, Dan Williams wrote:
> In advance of converting DAX pages to be 0-based, use a new
> dax_page_idle() helper to both simplify that future conversion, but also
> document all the kernel locations that are watching for DAX page idle
> events.
> 
> Cc: Matthew Wilcox <willy@...radead.org>
> Cc: Jan Kara <jack@...e.cz>
> Cc: "Darrick J. Wong" <djwong@...nel.org>
> Cc: Jason Gunthorpe <jgg@...dia.com>
> Cc: Christoph Hellwig <hch@....de>
> Cc: John Hubbard <jhubbard@...dia.com>
> Signed-off-by: Dan Williams <dan.j.williams@...el.com>
> ---
>  fs/dax.c            |    4 ++--
>  fs/ext4/inode.c     |    3 +--
>  fs/fuse/dax.c       |    5 ++---
>  fs/xfs/xfs_file.c   |    5 ++---
>  include/linux/dax.h |    9 +++++++++
>  5 files changed, 16 insertions(+), 10 deletions(-)

Reviewed-by: Jason Gunthorpe <jgg@...dia.com>

Jason