From: Christoph Hellwig <hch@infradead.org>
To: Dan Williams <dan.j.williams@intel.com>
Cc: linux-nvdimm@ml01.01.org, Neil Brown <neilb@suse.de>,
Greg KH <gregkh@linuxfoundation.org>,
linux-kernel@vger.kernel.org
Subject: Re: [Linux-nvdimm] [PATCH 19/21] nd: infrastructure for btt devices
Date: Tue, 28 Apr 2015 06:01:04 -0700 [thread overview]
Message-ID: <20150428130104.GE30852@infradead.org> (raw)
In-Reply-To: <20150418013655.25237.41353.stgit@dwillia2-desk3.amr.corp.intel.com>
On Fri, Apr 17, 2015 at 09:36:55PM -0400, Dan Williams wrote:
> Block devices from an nd bus, in addition to accepting "struct bio"
> based requests, also have the capability to perform byte-aligned
> accesses. By default only the bio/block interface is used. However, if
> another driver can make effective use of the byte-aligned capability it
> can claim/disable the block interface and use the byte-aligned "nd_io"
> interface.
>
> The BTT driver is the intended first consumer of this mechanism to allow
> layering atomic sector update guarantees on top of nd_io capable
> nd-bus-block-devices.
Please don't add any of the nd-specific hacks into the pmem driver.
The rw_bytes functionality already is provided by the existing block
level ->rw_page method which pmem already implements, and any sort
of bus locking for different access methods should be in the bus
glue, not in pmem.c
next prev parent reply other threads:[~2015-04-28 13:01 UTC|newest]
Thread overview: 84+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-04-18 1:35 [PATCH 00/21] ND: NFIT-Defined / NVDIMM Subsystem Dan Williams
2015-04-18 1:35 ` [PATCH 01/21] e820, efi: add ACPI 6.0 persistent memory types Dan Williams
2015-04-18 4:41 ` Andy Lutomirski
2015-04-19 7:46 ` Boaz Harrosh
2015-04-20 17:08 ` Dan Williams
2015-04-28 12:46 ` [Linux-nvdimm] " Christoph Hellwig
2015-04-28 19:20 ` Dan Williams
2015-04-18 1:35 ` [PATCH 02/21] ND NFIT-Defined/NVIDIMM Subsystem Dan Williams
2015-04-20 7:06 ` Ingo Molnar
2015-04-20 8:14 ` Dan Williams
2015-04-20 12:53 ` Christoph Hellwig
2015-04-20 15:57 ` Dan Williams
2015-04-21 13:38 ` Dan Williams
2015-04-28 12:48 ` [Linux-nvdimm] " Christoph Hellwig
2015-04-18 1:35 ` [PATCH 03/21] nd_acpi: initial core implementation and nfit skeleton Dan Williams
2015-04-18 19:41 ` Paul Bolle
2015-04-19 19:12 ` Rafael J. Wysocki
2015-04-28 12:53 ` [Linux-nvdimm] " Christoph Hellwig
2015-04-28 19:21 ` Dan Williams
2015-04-18 1:35 ` [PATCH 04/21] nd: create an 'nd_bus' from an 'nfit_desc' Dan Williams
2015-04-21 19:35 ` [Linux-nvdimm] " Toshi Kani
2015-04-21 19:58 ` Dan Williams
2015-04-21 19:55 ` Toshi Kani
2015-04-21 20:35 ` Dan Williams
2015-04-21 20:32 ` Toshi Kani
2015-04-22 16:39 ` Toshi Kani
2015-04-22 17:03 ` Dan Williams
2015-04-22 18:00 ` Linda Knippers
2015-04-22 18:20 ` Dan Williams
2015-04-22 18:23 ` Toshi Kani
2015-04-22 19:28 ` Dan Williams
2015-04-22 19:38 ` Toshi Kani
2015-04-22 20:00 ` Dan Williams
2015-04-28 16:47 ` Toshi Kani
2015-04-28 17:14 ` Toshi Kani
2015-04-18 1:35 ` [PATCH 05/21] nfit-test: manufactured NFITs for interface development Dan Williams
2015-04-24 21:47 ` [Linux-nvdimm] " Linda Knippers
2015-04-24 21:50 ` Dan Williams
2015-04-24 21:59 ` Linda Knippers
2015-04-24 23:02 ` Dan Williams
2015-04-28 12:54 ` Christoph Hellwig
2015-04-28 19:35 ` Dan Williams
2015-04-18 1:35 ` [PATCH 06/21] nd: ndctl class device, and nd bus attributes Dan Williams
2015-04-18 8:07 ` Greg KH
2015-04-18 20:08 ` Dan Williams
2015-04-18 1:35 ` [PATCH 07/21] nd: dimm devices (nfit "memory-devices") Dan Williams
2015-04-18 8:06 ` Greg KH
2015-04-18 20:12 ` Dan Williams
2015-04-18 1:35 ` [PATCH 08/21] nd: ndctl.h, the nd ioctl abi Dan Williams
2015-04-21 21:20 ` [Linux-nvdimm] " Toshi Kani
2015-04-21 22:05 ` Dan Williams
2015-04-21 22:16 ` Toshi Kani
2015-04-24 15:56 ` Toshi Kani
2015-04-24 16:09 ` Toshi Kani
2015-04-24 16:31 ` Dan Williams
2015-04-24 16:25 ` Dan Williams
2015-04-24 17:18 ` Toshi Kani
2015-04-24 17:45 ` Dan Williams
2015-04-25 0:35 ` Toshi Kani
2015-04-18 1:36 ` [PATCH 09/21] nd_dimm: dimm driver and base nd-bus device-driver infrastructure Dan Williams
2015-04-18 1:36 ` [PATCH 10/21] nd: regions (block-data-window, persistent memory, volatile memory) Dan Williams
2015-04-18 1:36 ` [PATCH 11/21] nd_region: support for legacy nvdimms Dan Williams
2015-04-18 1:36 ` [PATCH 12/21] nd_pmem: add NFIT support to the pmem driver Dan Williams
2015-04-18 6:38 ` Christoph Hellwig
2015-04-18 19:37 ` Dan Williams
2015-04-28 12:56 ` [Linux-nvdimm] " Christoph Hellwig
2015-04-28 19:37 ` Dan Williams
2015-04-18 1:36 ` [PATCH 13/21] nd: add interleave-set state-tracking infrastructure Dan Williams
2015-04-18 1:36 ` [PATCH 14/21] nd: namespace indices: read and validate Dan Williams
2015-04-18 1:36 ` [PATCH 15/21] nd: pmem label sets and namespace instantiation Dan Williams
2015-04-18 1:36 ` [PATCH 16/21] nd: blk labels " Dan Williams
2015-04-18 1:36 ` [PATCH 17/21] nd: write pmem label set Dan Williams
2015-04-18 1:36 ` [PATCH 18/21] nd: write blk " Dan Williams
2015-04-18 1:36 ` [PATCH 19/21] nd: infrastructure for btt devices Dan Williams
2015-04-22 19:12 ` [Linux-nvdimm] " Elliott, Robert (Server Storage)
2015-04-22 19:39 ` Dan Williams
2015-04-28 13:01 ` Christoph Hellwig [this message]
2015-04-28 15:42 ` Matthew Wilcox
2015-04-18 1:37 ` [PATCH 20/21] nd_btt: atomic sector updates Dan Williams
2015-04-18 1:37 ` [PATCH 21/21] nd_blk: nfit blk driver Dan Williams
2015-04-18 19:29 ` [PATCH 00/21] ND: NFIT-Defined / NVDIMM Subsystem Dan Williams
2015-04-22 19:06 ` [Linux-nvdimm] " Elliott, Robert (Server Storage)
2015-04-22 19:39 ` Dan Williams
2015-04-23 5:43 ` Ingo Molnar
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