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
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