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Date:   Wed, 3 Jul 2019 05:17:43 -0700
From:   Matthew Wilcox <willy@infradead.org>
To:     Dan Williams <dan.j.williams@intel.com>
Cc:     linux-fsdevel@vger.kernel.org, Jan Kara <jack@suse.cz>,
        Boaz Harrosh <openosd@gmail.com>, stable@vger.kernel.org,
        Robert Barror <robert.barror@intel.com>,
        Seema Pandit <seema.pandit@intel.com>,
        linux-nvdimm@lists.01.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] dax: Fix missed PMD wakeups
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On Wed, Jul 03, 2019 at 12:24:54AM -0700, Dan Williams wrote:
> This fix may increase waitqueue contention, but a fix for that is saved
> for a larger rework. In the meantime this fix is suitable for -stable
> backports.

I think this is too big for what it is; just the two-line patch to stop
incorporating the low bits of the PTE would be more appropriate.