linux-ext4 - Re: [PATCH 0/4 v4] mm,dax: Fix data corruption due to mmap inconsistency

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Date:   Wed, 10 May 2017 11:27:55 -0600
From:   Ross Zwisler <ross.zwisler@...ux.intel.com>
To:     Jan Kara <jack@...e.cz>
Cc:     Andrew Morton <akpm@...ux-foundation.org>,
        Ross Zwisler <ross.zwisler@...ux.intel.com>,
        Dan Williams <dan.j.williams@...el.com>,
        linux-ext4@...r.kernel.org, linux-fsdevel@...r.kernel.org,
        linux-nvdimm@...ts.01.org, linux-mm@...ck.org
Subject: Re: [PATCH 0/4 v4] mm,dax: Fix data corruption due to mmap
 inconsistency

On Wed, May 10, 2017 at 10:54:15AM +0200, Jan Kara wrote:
> Hello,
> 
> this series fixes data corruption that can happen for DAX mounts when
> page faults race with write(2) and as a result page tables get out of sync
> with block mappings in the filesystem and thus data seen through mmap is
> different from data seen through read(2).
> 
> The series passes testing with t_mmap_stale test program from Ross and also
> other mmap related tests on DAX filesystem.
> 
> Andrew, can you please merge these patches? Thanks!
> 
> Changes since v3:
> * Rebased on top of current Linus' tree due to non-trivial conflicts with
>   added tracepoint

Cool, the merge update looks correct to me.