From: Dan Williams <dan.j.williams@intel.com>
To: Toshi Kani <toshi.kani@hpe.com>
Cc: Alasdair Kergon <agk@redhat.com>,
Mike Snitzer <snitzer@redhat.com>,
Ross Zwisler <ross.zwisler@linux.intel.com>,
Al Viro <viro@zeniv.linux.org.uk>, Jens Axboe <axboe@kernel.dk>,
"linux-nvdimm@lists.01.org" <linux-nvdimm@ml01.01.org>,
dm-devel@redhat.com, linux-raid <linux-raid@vger.kernel.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH 0/6] Support DAX for device-mapper dm-linear devices
Date: Mon, 13 Jun 2016 16:18:18 -0700 [thread overview]
Message-ID: <CAPcyv4jdM1phR=kGoP2-7tfsVvbNe2C6hHNS5TD28ALGZQQTSw@mail.gmail.com> (raw)
In-Reply-To: <1465856497-19698-1-git-send-email-toshi.kani@hpe.com>
Thanks Toshi!
On Mon, Jun 13, 2016 at 3:21 PM, Toshi Kani <toshi.kani@hpe.com> wrote:
> This patch-set adds DAX support to device-mapper dm-linear devices
> used by LVM. It works with LVM commands as follows:
> - Creation of a logical volume with all DAX capable devices (such
> as pmem) sets the logical volume DAX capable as well.
> - Once a logical volume is set to DAX capable, the volume may not
> be extended with non-DAX capable devices.
I don't mind this, but it seems a policy decision that the kernel does
not need to make. A sufficiently sophisticated user could cope with
DAX being available at varying LBAs. Would it be sufficient to move
this policy decision to userspace tooling?
> The direct_access interface is added to dm and dm-linear to map
> a request to a target device.
I had dm-linear and md-raid0 support on my list of things to look at,
did you have raid0 in your plans?
next prev parent reply other threads:[~2016-06-13 23:18 UTC|newest]
Thread overview: 40+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-06-13 22:21 [PATCH 0/6] Support DAX for device-mapper dm-linear devices Toshi Kani
2016-06-13 22:21 ` [PATCH 1/6] genhd: Add GENHD_FL_DAX to gendisk flags Toshi Kani
2016-06-13 22:21 ` [PATCH 2/6] block: Check GENHD_FL_DAX for DAX capability Toshi Kani
2016-06-13 22:21 ` [PATCH 3/6] dm: Add dm_blk_direct_access() for mapped device Toshi Kani
2016-06-13 22:21 ` [PATCH 4/6] dm-linear: Add linear_direct_access() Toshi Kani
2016-06-13 22:21 ` [PATCH 5/6] dm, dm-linear: Add dax_supported to dm_target Toshi Kani
2016-06-13 22:21 ` [PATCH 6/6] dm: Enable DAX support for mapper device Toshi Kani
2016-06-13 22:57 ` [PATCH 0/6] Support DAX for device-mapper dm-linear devices Mike Snitzer
2016-06-20 18:00 ` Mike Snitzer
2016-06-20 18:31 ` Kani, Toshimitsu
2016-06-20 19:40 ` Mike Snitzer
2016-06-20 19:52 ` Mike Snitzer
2016-06-20 20:11 ` Kani, Toshimitsu
2016-06-20 21:28 ` Kani, Toshimitsu
2016-06-20 22:22 ` Mike Snitzer
2016-06-21 13:41 ` Mike Snitzer
2016-06-21 15:44 ` Kani, Toshimitsu
2016-06-21 15:50 ` Kani, Toshimitsu
2016-06-21 16:25 ` Dan Williams
2016-06-21 16:35 ` Kani, Toshimitsu
2016-06-21 16:45 ` Dan Williams
2016-06-21 16:56 ` Kani, Toshimitsu
2016-06-21 18:17 ` Mike Snitzer
2016-06-22 17:44 ` Kani, Toshimitsu
2016-06-22 19:15 ` Dan Williams
2016-06-22 20:16 ` Kani, Toshimitsu
2016-06-22 22:38 ` Mike Snitzer
2016-06-22 22:59 ` Kani, Toshimitsu
2016-06-13 23:18 ` Dan Williams [this message]
2016-06-13 23:59 ` Kani, Toshimitsu
2016-06-14 0:02 ` Dan Williams
2016-06-14 7:30 ` Dan Williams
2016-06-14 13:50 ` Jeff Moyer
2016-06-14 15:41 ` Mike Snitzer
2016-06-14 18:00 ` Kani, Toshimitsu
2016-06-14 20:19 ` Jeff Moyer
2016-06-15 1:46 ` Mike Snitzer
2016-06-15 2:07 ` Dan Williams
2016-06-15 2:35 ` Mike Snitzer
2016-06-14 15:53 ` Kani, Toshimitsu
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