linux-kernel - Re: [PATCH 0/7] re-enable DAX PMD support

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Message-ID: <CAPcyv4j_eh8Rcozb40JeiPwvbPoMY2sCt+yTewZ-MZzUkBbj-Q@mail.gmail.com>
Date:	Mon, 15 Aug 2016 13:21:47 -0700
From:	Dan Williams <dan.j.williams@...el.com>
To:	Ross Zwisler <ross.zwisler@...ux.intel.com>
Cc:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"Theodore Ts'o" <tytso@....edu>,
	Alexander Viro <viro@...iv.linux.org.uk>,
	Andreas Dilger <adilger.kernel@...ger.ca>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Dave Chinner <david@...morbit.com>, Jan Kara <jack@...e.com>,
	linux-ext4 <linux-ext4@...r.kernel.org>,
	linux-fsdevel <linux-fsdevel@...r.kernel.org>,
	Linux MM <linux-mm@...ck.org>,
	"linux-nvdimm@...ts.01.org" <linux-nvdimm@...ts.01.org>
Subject: Re: [PATCH 0/7] re-enable DAX PMD support

On Mon, Aug 15, 2016 at 12:09 PM, Ross Zwisler
<ross.zwisler@...ux.intel.com> wrote:
> DAX PMDs have been disabled since Jan Kara introduced DAX radix tree based
> locking.  This series allows DAX PMDs to participate in the DAX radix tree
> based locking scheme so that they can be re-enabled.

Looks good to me.

> This series restores DAX PMD functionality back to what it was before it
> was disabled.  There is still a known issue between DAX PMDs and hole
> punch, which I am currently working on and which I plan to address with a
> separate series.

Perhaps we should hold off on applying patch 6 and 7 until after the
hole-punch fix is ready?