From: Vishal Verma <vishal.l.verma@intel.com>
To: Dan Williams <dan.j.williams@intel.com>,
Vishal Verma <vishal.l.verma@intel.com>,
Dave Jiang <dave.jiang@intel.com>,
Andrew Morton <akpm@linux-foundation.org>,
Oscar Salvador <osalvador@suse.de>
Cc: linux-kernel@vger.kernel.org, nvdimm@lists.linux.dev,
linux-cxl@vger.kernel.org, David Hildenbrand <david@redhat.com>,
Dave Hansen <dave.hansen@linux.intel.com>,
Huang Ying <ying.huang@intel.com>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Matthew Wilcox <willy@infradead.org>,
linux-mm@kvack.org, Michal Hocko <mhocko@suse.com>,
Li Zhijian <lizhijian@fujitsu.com>,
Jonathan Cameron <Jonathan.Cameron@huawei.com>
Subject: [PATCH v7 0/5] Add DAX ABI for memmap_on_memory
Date: Wed, 24 Jan 2024 12:03:45 -0800 [thread overview]
Message-ID: <20240124-vv-dax_abi-v7-0-20d16cb8d23d@intel.com> (raw)
This series adds sysfs ABI to control memmap_on_memory behavior for DAX
devices.
Patch 1 replaces incorrect device_lock() usage with a local rwsem - this
was identified during review.
Patch 2 is also a preparatory patch that replaces sprintf() for sysfs
operations with sysfs_emit()
Patch 3 adds the missing documentation for the sysfs ABI for DAX regions
and Dax devices.
Patch 4 exports mhp_supports_memmap_on_memory().
Patch 5 adds the new ABI for toggling memmap_on_memory semantics for dax
devices.
---
Changes in v7:
- Rebase to v6.8-rc1
- Remove an unnecessary 'size' variable. (Matthew)
- Replace device lock (ab)use in dax/bus.c with local rwsems (Greg)
- Replace sprintf() usage with sysfs_emit() (Greg)
- Link to v6: https://lore.kernel.org/r/20231214-vv-dax_abi-v6-0-ad900d698438@intel.com
Changes in v6:
- Use sysfs_emit() in memmap_on_memory_show() (Greg)
- Change the ABI documentation date for memmap_on_memory to January 2024
as that's likely when the 6.8 merge window will fall (Greg)
- Fix dev->driver check (Ying)
- Link to v5: https://lore.kernel.org/r/20231214-vv-dax_abi-v5-0-3f7b006960b4@intel.com
Changes in v5:
- Export and check mhp_supports_memmap_on_memory() in the DAX sysfs ABI
(David)
- Obtain dax_drv under the device lock (Ying)
- Check dax_drv for NULL before dereferencing it (Ying)
- Clean up some repetition in sysfs-bus-dax documentation entries
(Jonathan)
- A few additional cleanups enabled by guard(device) (Jonathan)
- Drop the DEFINE_GUARD() part of patch 2, add dependency on Dan's patch
above so it can be backported / applied separately (Jonathan, Dan)
- Link to v4: https://lore.kernel.org/r/20231212-vv-dax_abi-v4-0-1351758f0c92@intel.com
Changes in v4:
- Hold the device lock when checking if the dax_dev is bound to kmem
(Ying, Dan)
- Remove dax region checks (and locks) as they were unnecessary.
- Introduce guard(device) for device lock/unlock (Dan)
- Convert the rest of drivers/dax/bus.c to guard(device)
- Link to v3: https://lore.kernel.org/r/20231211-vv-dax_abi-v3-0-acf6cc1bde9f@intel.com
Changes in v3:
- Fix typo in ABI docs (Zhijian Li)
- Add kernel config and module parameter dependencies to the ABI docs
entry (David Hildenbrand)
- Ensure kmem isn't active when setting the sysfs attribute (Ying
Huang)
- Simplify returning from memmap_on_memory_store()
- Link to v2: https://lore.kernel.org/r/20231206-vv-dax_abi-v2-0-f4f4f2336d08@intel.com
Changes in v2:
- Fix CC lists, patch 1/2 didn't get sent correctly in v1
- Link to v1: https://lore.kernel.org/r/20231206-vv-dax_abi-v1-0-474eb88e201c@intel.com
Cc: <linux-kernel@vger.kernel.org>
Cc: <nvdimm@lists.linux.dev>
Cc: <linux-cxl@vger.kernel.org>
Cc: David Hildenbrand <david@redhat.com>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: Huang Ying <ying.huang@intel.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: <linux-mm@kvack.org>
To: Dan Williams <dan.j.williams@intel.com>
To: Vishal Verma <vishal.l.verma@intel.com>
To: Dave Jiang <dave.jiang@intel.com>
To: Andrew Morton <akpm@linux-foundation.org>
To: Oscar Salvador <osalvador@suse.de>
---
Vishal Verma (5):
dax/bus.c: replace driver-core lock usage by a local rwsem
dax/bus.c: replace several sprintf() with sysfs_emit()
Documentatiion/ABI: Add ABI documentation for sys-bus-dax
mm/memory_hotplug: export mhp_supports_memmap_on_memory()
dax: add a sysfs knob to control memmap_on_memory behavior
include/linux/memory_hotplug.h | 6 +
drivers/dax/bus.c | 295 +++++++++++++++++++++++---------
mm/memory_hotplug.c | 17 +-
Documentation/ABI/testing/sysfs-bus-dax | 153 +++++++++++++++++
4 files changed, 381 insertions(+), 90 deletions(-)
---
base-commit: 6613476e225e090cc9aad49be7fa504e290dd33d
change-id: 20231025-vv-dax_abi-17a219c46076
Best regards,
--
Vishal Verma <vishal.l.verma@intel.com>
next reply other threads:[~2024-01-24 20:04 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-01-24 20:03 Vishal Verma [this message]
2024-01-24 20:03 ` [PATCH v7 1/5] dax/bus.c: replace driver-core lock usage by a local rwsem Vishal Verma
2024-01-26 21:12 ` Alison Schofield
2024-03-12 20:07 ` Dan Williams
2024-03-12 20:20 ` Verma, Vishal L
2024-03-12 20:22 ` Andrew Morton
2024-01-24 20:03 ` [PATCH v7 2/5] dax/bus.c: replace several sprintf() with sysfs_emit() Vishal Verma
2024-01-26 21:14 ` Alison Schofield
2024-01-24 20:03 ` [PATCH v7 3/5] Documentatiion/ABI: Add ABI documentation for sys-bus-dax Vishal Verma
2024-01-24 20:03 ` [PATCH v7 4/5] mm/memory_hotplug: export mhp_supports_memmap_on_memory() Vishal Verma
2024-01-24 20:03 ` [PATCH v7 5/5] dax: add a sysfs knob to control memmap_on_memory behavior Vishal Verma
2024-01-26 21:40 ` Alison Schofield
2024-01-26 1:29 ` [PATCH v7 0/5] Add DAX ABI for memmap_on_memory Andrew Morton
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20240124-vv-dax_abi-v7-0-20d16cb8d23d@intel.com \
--to=vishal.l.verma@intel.com \
--cc=Jonathan.Cameron@huawei.com \
--cc=akpm@linux-foundation.org \
--cc=dan.j.williams@intel.com \
--cc=dave.hansen@linux.intel.com \
--cc=dave.jiang@intel.com \
--cc=david@redhat.com \
--cc=gregkh@linuxfoundation.org \
--cc=linux-cxl@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-mm@kvack.org \
--cc=lizhijian@fujitsu.com \
--cc=mhocko@suse.com \
--cc=nvdimm@lists.linux.dev \
--cc=osalvador@suse.de \
--cc=willy@infradead.org \
--cc=ying.huang@intel.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.