linux-ext4 - Re: [PATCH 0/6 v3] dax: Page invalidation fixes

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Date:   Mon, 12 Dec 2016 12:51:33 -0500
From:   Johannes Weiner <hannes@...xchg.org>
To:     Jan Kara <jack@...e.cz>
Cc:     linux-fsdevel@...r.kernel.org,
        Ross Zwisler <ross.zwisler@...ux.intel.com>,
        linux-mm@...ck.org, linux-ext4@...r.kernel.org
Subject: Re: [PATCH 0/6 v3] dax: Page invalidation fixes

On Mon, Dec 12, 2016 at 05:47:02PM +0100, Jan Kara wrote:
> Hello,
> 
> this is the third revision of my fixes of races when invalidating hole pages in
> DAX mappings. See changelogs for details. The series is based on my patches to
> write-protect DAX PTEs which are currently carried in mm tree. This is a hard
> dependency because we really need to closely track dirtiness (and cleanness!)
> of radix tree entries in DAX mappings in order to avoid discarding valid dirty
> bits leading to missed cache flushes on fsync(2).
> 
> The tests have passed xfstests for xfs and ext4 in DAX and non-DAX mode.
> 
> Johannes, are you OK with patch 2/6 in its current form? I'd like to push these
> patches to some tree once DAX write-protection patches are merged.  I'm hoping
> to get at least first three patches merged for 4.10-rc2... Thanks!

LGTM, thanks Jan
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