From: Mike Snitzer <snitzer@redhat.com>
To: Bart Van Assche <Bart.VanAssche@wdc.com>
Cc: "dan.j.williams@intel.com" <dan.j.williams@intel.com>,
"linux-nvdimm@lists.01.org" <linux-nvdimm@lists.01.org>,
"dm-devel@redhat.com" <dm-devel@redhat.com>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"toshi.kani@hpe.com" <toshi.kani@hpe.com>,
"linux-block@vger.kernel.org" <linux-block@vger.kernel.org>,
"hch@lst.de" <hch@lst.de>,
"linux-fsdevel@vger.kernel.org" <linux-fsdevel@vger.kernel.org>
Subject: Re: [resend PATCH v2 11/33] dm: add dax_device and dax_operations support
Date: Fri, 28 Jul 2017 13:48:30 -0400 [thread overview]
Message-ID: <20170728174830.GA13772@redhat.com> (raw)
In-Reply-To: <1501258623.2413.3.camel@wdc.com>
On Fri, Jul 28 2017 at 12:17pm -0400,
Bart Van Assche <Bart.VanAssche@wdc.com> wrote:
> On Mon, 2017-04-17 at 12:09 -0700, Dan Williams wrote:
> > diff --git a/drivers/md/Kconfig b/drivers/md/Kconfig
> > index b7767da50c26..1de8372d9459 100644
> > --- a/drivers/md/Kconfig
> > +++ b/drivers/md/Kconfig
> > @@ -200,6 +200,7 @@ config BLK_DEV_DM_BUILTIN
> > config BLK_DEV_DM
> > tristate "Device mapper support"
> > select BLK_DEV_DM_BUILTIN
> > + select DAX
> > ---help---
> > Device-mapper is a low level volume manager. It works by allowing
> > people to specify mappings for ranges of logical sectors. Various
>
> (replying to an e-mail of three months ago)
>
> Hello Dan,
>
> While building a v4.12 kernel I noticed that enabling device mapper support
> now unconditionally enables DAX. I think there are plenty of systems that use
> dm but do not need DAX. Have you considered to rework this such that instead
> of dm selecting DAX that DAX support is only enabled in dm if CONFIG_DAX is
> enabled?
I haven't but patches to do so would be welcomed.
Mike
next prev parent reply other threads:[~2017-07-28 17:48 UTC|newest]
Thread overview: 44+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-04-17 19:08 [resend PATCH v2 00/33] dax: introduce dax_operations Dan Williams
2017-04-17 19:08 ` [resend PATCH v2 01/33] device-dax: rename 'dax_dev' to 'dev_dax' Dan Williams
2017-04-17 19:09 ` [resend PATCH v2 02/33] dax: refactor dax-fs into a generic provider of 'struct dax_device' instances Dan Williams
2017-04-17 19:09 ` [resend PATCH v2 03/33] dax: add a facility to lookup a dax device by 'host' device name Dan Williams
2017-04-17 19:09 ` [resend PATCH v2 04/33] dax: introduce dax_operations Dan Williams
2017-04-17 19:09 ` [resend PATCH v2 05/33] pmem: add dax_operations support Dan Williams
2017-04-17 19:09 ` [resend PATCH v2 06/33] axon_ram: " Dan Williams
2017-04-17 19:09 ` [resend PATCH v2 07/33] brd: " Dan Williams
2017-04-17 19:09 ` [resend PATCH v2 08/33] dcssblk: " Dan Williams
2017-04-19 15:31 ` Gerald Schaefer
2017-04-19 15:44 ` Dan Williams
2017-04-17 19:09 ` [resend PATCH v2 09/33] block: kill bdev_dax_capable() Dan Williams
2017-04-17 19:09 ` [resend PATCH v2 10/33] dax: introduce dax_direct_access() Dan Williams
2017-04-17 19:09 ` [resend PATCH v2 11/33] dm: add dax_device and dax_operations support Dan Williams
2017-04-20 16:30 ` Dan Williams
2017-04-22 15:25 ` Mike Snitzer
2017-07-28 16:17 ` Bart Van Assche
2017-07-28 17:48 ` Mike Snitzer [this message]
2017-07-29 19:57 ` Dan Williams
2017-07-29 21:24 ` Bart Van Assche
2017-04-17 19:09 ` [resend PATCH v2 12/33] dm: teach dm-targets to use a dax_device + dax_operations Dan Williams
2017-04-17 19:09 ` [resend PATCH v2 13/33] ext2, ext4, xfs: retrieve dax_device for iomap operations Dan Williams
2017-04-17 19:10 ` [resend PATCH v2 14/33] Revert "block: use DAX for partition table reads" Dan Williams
2017-04-17 19:10 ` [resend PATCH v2 15/33] filesystem-dax: convert to dax_direct_access() Dan Williams
2017-04-17 19:10 ` [resend PATCH v2 16/33] block, dax: convert bdev_dax_supported() " Dan Williams
2017-04-17 19:10 ` [resend PATCH v2 17/33] block: remove block_device_operations ->direct_access() Dan Williams
2017-04-17 19:10 ` [resend PATCH v2 18/33] x86, dax, pmem: remove indirection around memcpy_from_pmem() Dan Williams
2017-04-17 19:10 ` [resend PATCH v2 19/33] dax, pmem: introduce 'copy_from_iter' dax operation Dan Williams
2017-04-17 19:10 ` [resend PATCH v2 20/33] dm: add ->copy_from_iter() dax operation support Dan Williams
2017-04-17 19:10 ` [resend PATCH v2 21/33] filesystem-dax: convert to dax_copy_from_iter() Dan Williams
2017-04-17 19:10 ` [resend PATCH v2 22/33] dax, pmem: introduce an optional 'flush' dax_operation Dan Williams
2017-04-17 19:10 ` [resend PATCH v2 23/33] dm: add ->flush() dax operation support Dan Williams
2017-04-17 19:10 ` [resend PATCH v2 24/33] filesystem-dax: convert to dax_flush() Dan Williams
2017-04-17 19:11 ` [resend PATCH v2 25/33] x86, dax: replace clear_pmem() with open coded memset + dax_ops->flush Dan Williams
2017-04-17 19:11 ` [resend PATCH v2 26/33] x86, dax, libnvdimm: move wb_cache_pmem() to libnvdimm Dan Williams
2017-04-17 19:11 ` [resend PATCH v2 27/33] x86, libnvdimm, pmem: move arch_invalidate_pmem() " Dan Williams
2017-04-17 19:11 ` [resend PATCH v2 28/33] x86, libnvdimm, dax: stop abusing __copy_user_nocache Dan Williams
2017-04-17 19:11 ` [resend PATCH v2 29/33] uio, libnvdimm, pmem: implement cache bypass for all copy_from_iter() operations Dan Williams
2017-04-17 19:11 ` [resend PATCH v2 30/33] libnvdimm, pmem: fix persistence warning Dan Williams
2017-04-17 19:11 ` [resend PATCH v2 31/33] libnvdimm, nfit: enable support for volatile ranges Dan Williams
2017-04-17 19:11 ` [resend PATCH v2 32/33] filesystem-dax: gate calls to dax_flush() on QUEUE_FLAG_WC Dan Williams
2017-04-17 19:11 ` [resend PATCH v2 33/33] libnvdimm, pmem: disable dax flushing when pmem is fronting a volatile region Dan Williams
2017-04-22 1:06 ` [resend PATCH v2 00/33] dax: introduce dax_operations Dan Williams
2017-04-25 22:33 ` Dan Williams
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