Re: [PATCH 1/3] dax: Take shared lock in dax_do_io()

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To: Waiman Long <Waiman.Long@xxxxxxx>
Subject: Re: [PATCH 1/3] dax: Take shared lock in dax_do_io()
From: Christoph Hellwig <hch@xxxxxxxxxxxxx>
Date: Thu, 9 Jun 2016 02:01:07 -0700
Cc: "Theodore Ts'o" <tytso@xxxxxxx>, Andreas Dilger <adilger.kernel@xxxxxxxxx>, Alexander Viro <viro@xxxxxxxxxxxxxxxxxx>, Matthew Wilcox <willy@xxxxxxxxxxxxxxx>, linux-ext4@xxxxxxxxxxxxxxx, linux-kernel@xxxxxxxxxxxxxxx, Dave Chinner <david@xxxxxxxxxxxxx>, Christoph Hellwig <hch@xxxxxxxxxxxxx>, Jan Kara <jack@xxxxxxx>, Scott J Norton <scott.norton@xxxxxxx>, Douglas Hatch <doug.hatch@xxxxxxx>, Toshimitsu Kani <toshi.kani@xxxxxxx>
In-reply-to: <1464992897-34063-2-git-send-email-Waiman.Long@hpe.com>
References: <1464992897-34063-1-git-send-email-Waiman.Long@hpe.com> <1464992897-34063-2-git-send-email-Waiman.Long@hpe.com>
User-agent: Mutt/1.5.24 (2015-08-30)

Please just take the extra step and move the locking out of dax_do_io
and into the caller.

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References:
- [PATCH 0/3] dax, ext4: Improve DAX performance in ext4
  - From: Waiman Long
- [PATCH 1/3] dax: Take shared lock in dax_do_io()
  - From: Waiman Long

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