linux-kernel - Re: [PATCH V10 09/11] fs: Lift XFS

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Message-ID: <20200423223829.GX27860@dread.disaster.area>
Date:   Fri, 24 Apr 2020 08:38:29 +1000
From:   Dave Chinner <david@...morbit.com>
To:     ira.weiny@...el.com
Cc:     linux-kernel@...r.kernel.org, linux-xfs@...r.kernel.org,
        "Darrick J. Wong" <darrick.wong@...cle.com>,
        Al Viro <viro@...iv.linux.org.uk>, Jan Kara <jack@...e.cz>,
        Dan Williams <dan.j.williams@...el.com>,
        Christoph Hellwig <hch@....de>,
        "Theodore Y. Ts'o" <tytso@....edu>, Jeff Moyer <jmoyer@...hat.com>,
        linux-ext4@...r.kernel.org, linux-fsdevel@...r.kernel.org,
        linux-api@...r.kernel.org
Subject: Re: [PATCH V10 09/11] fs: Lift XFS_IDONTCACHE to the VFS layer

On Wed, Apr 22, 2020 at 02:21:00PM -0700, ira.weiny@...el.com wrote:
> From: Ira Weiny <ira.weiny@...el.com>
> 
> DAX effective mode (S_DAX) changes requires inode eviction.
> 
> XFS has an advisory flag (XFS_IDONTCACHE) to prevent caching of the
> inode if no other additional references are taken.  We lift this flag to
> the VFS layer and change the behavior slightly by allowing the flag to
> remain even if multiple references are taken.
> 
> This will expedite the eviction of inodes to change S_DAX.
> 
> Cc: Al Viro <viro@...iv.linux.org.uk>
> Reviewed-by: Jan Kara <jack@...e.cz>
> Signed-off-by: Ira Weiny <ira.weiny@...el.com>

Looks good.

Reviewed-by: Dave Chinner <dchinner@...hat.com>

-- 
Dave Chinner
david@...morbit.com