linux-ext4 - Re: [PATCH v6 4/5] dax: for truncate/hole-punch, do zeroing through the driver if possible

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Date:	Tue, 10 May 2016 19:49:01 +0000
From:	"Verma, Vishal L" <vishal.l.verma@...el.com>
To:	"hch@...radead.org" <hch@...radead.org>,
	"axboe@...com" <axboe@...com>
CC:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-block@...r.kernel.org" <linux-block@...r.kernel.org>,
	"xfs@....sgi.com" <xfs@....sgi.com>,
	"linux-nvdimm@...1.01.org" <linux-nvdimm@...1.01.org>,
	"jmoyer@...hat.com" <jmoyer@...hat.com>,
	"linux-mm@...ck.org" <linux-mm@...ck.org>,
	"Williams, Dan J" <dan.j.williams@...el.com>,
	"akpm@...ux-foundation.org" <akpm@...ux-foundation.org>,
	"linux-fsdevel@...r.kernel.org" <linux-fsdevel@...r.kernel.org>,
	"ross.zwisler@...ux.intel.com" <ross.zwisler@...ux.intel.com>,
	"linux-ext4@...r.kernel.org" <linux-ext4@...r.kernel.org>,
	"boaz@...xistor.com" <boaz@...xistor.com>,
	"david@...morbit.com" <david@...morbit.com>,
	"jack@...e.cz" <jack@...e.cz>
Subject: Re: [PATCH v6 4/5] dax: for truncate/hole-punch, do zeroing through
 the driver if possible

On Tue, 2016-05-10 at 12:25 -0700, Christoph Hellwig wrote:
> Hi Vishal,
> 
> can you also pick up the my patch to add a low-level __dax_zero_range
> that I cced you on?  That way we can avoid a nasty merge conflict with
> my xfs/iomap changes.

Good idea - I'll do that for the next posting. I'll wait a day or two
for any additional reviews/acks.

I'm looking to get all this into a branch in the nvdimm tree once Jan
splits up his dax-locking series..

Mostly I guess I'm looking for a yay or nay for the block layer changes
(patch 2). Jens?