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Date: Fri, 8 Jun 2018 23:58:29 +0000
From: "Williams, Dan J" <dan.j.williams@...el.com>
To: "torvalds@...ux-foundation.org" <torvalds@...ux-foundation.org>
CC: "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
"linux-nvdimm@...ts.01.org" <linux-nvdimm@...ts.01.org>,
"linux-acpi@...r.kernel.org" <linux-acpi@...r.kernel.org>
Subject: [GIT PULL] libnvdimm for 4.18
Hi Linus, please pull from:
git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm tags/libnvdimm-for-4.18
...to receive the first part of the libnvdimm / persistent memory
support update for 4.18. These patches have all been in -next for
several releases. The 'DAX DMA vs Truncate' work has had extra soak
time as it nearly missed 4.17.
This pull request adds a user for the new 'bytes-remaining' updates to
memcpy_mcsafe() that you already received through Ingo via the x86-dax-
for-linus pull. There is a minor collision with bdev_dax_supported()
reworks that you pulled from xfs, and another minor collision of the
vm_fault_t conversion you received from Andrew. A potential merge
resolution is here: https://git.kernel.org/pub/scm/linux/kernel/git/nvd
imm/nvdimm.git/log/?h=libnvdimm-for-4.18-merge
Not included in this pull, but still targeting this cycle, is support
for handling memory media errors (poison) consumed via userspace dax
mappings.
---
The following changes since commit b04e217704b7f879c6b91222b066983a44a7a09f:
Linux 4.17-rc7 (2018-05-27 13:01:47 -0700)
are available in the Git repository at:
git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm tags/libnvdimm-for-4.18
for you to fetch changes up to 930218affeadd1325ea17e053f0dcecf218f5a4f:
Merge branch 'for-4.18/mcsafe' into libnvdimm-for-next (2018-06-08 15:16:44 -0700)
----------------------------------------------------------------
libnvdimm for 4.18
* DAX broke a fundamental assumption of truncate of file mapped pages.
The truncate path assumed that it is safe to disconnect a pinned page
from a file and let the filesystem reclaim the physical block. With DAX
the page is equivalent to the filesystem block. Introduce
dax_layout_busy_page() to enable filesystems to wait for pinned DAX
pages to be released. Without this wait a filesystem could allocate
blocks under active device-DMA to a new file.
* DAX arranges for the block layer to be bypassed and uses
dax_direct_access() + copy_to_iter() to satisfy read(2) calls.
However, the memcpy_mcsafe() facility is available through the pmem
block driver. In order to safely handle media errors, via the DAX
block-layer bypass, introduce copy_to_iter_mcsafe().
* Fix cache management policy relative to the ACPI NFIT Platform
Capabilities Structure to properly elide cache flushes when they are not
necessary. The table indicates whether CPU caches are power-fail
protected. Clarify that a deep flush is always performed on
REQ_{FUA,PREFLUSH} requests.
----------------------------------------------------------------
Dan Williams (17):
memremap: split devm_memremap_pages() and memremap() infrastructure
mm: introduce MEMORY_DEVICE_FS_DAX and CONFIG_DEV_PAGEMAP_OPS
mm: fix __gup_device_huge vs unmap
mm, fs, dax: handle layout changes to pinned dax mappings
xfs: prepare xfs_break_layouts() to be called with XFS_MMAPLOCK_EXCL
xfs: prepare xfs_break_layouts() for another layout type
xfs, dax: introduce xfs_break_dax_layouts()
uio, lib: Fix CONFIG_ARCH_HAS_UACCESS_MCSAFE compilation
dax: Introduce a ->copy_to_iter dax operation
dax: Report bytes remaining in dax_iomap_actor()
pmem: Switch to copy_to_iter_mcsafe()
x86, nfit_test: Add unit test for memcpy_mcsafe()
libnvdimm: Debug probe times
libnvdimm, e820: Register all pmem resources
acpi, nfit: Remove ecc_unit_size
Merge branch 'for-4.18/dax' into libnvdimm-for-next
Merge branch 'for-4.18/mcsafe' into libnvdimm-for-next
Matthew Wilcox (1):
dax: dax_insert_mapping_entry always succeeds
Robert Elliott (1):
linvdimm, pmem: Preserve read-only setting for pmem devices
Ross Zwisler (4):
libnvdimm, pmem: Complete REQ_FLUSH => REQ_PREFLUSH
libnvdimm, pmem: Unconditionally deep flush on *sync
libnvdimm, pmem: Do not flush power-fail protected CPU caches
dax: Use dax_write_cache* helpers
Documentation/ABI/removed/sysfs-bus-nfit | 17 +++
Documentation/ABI/testing/sysfs-bus-nfit | 19 ---
arch/x86/Kconfig | 1 +
arch/x86/Kconfig.debug | 3 +
arch/x86/include/asm/mcsafe_test.h | 75 +++++++++++
arch/x86/include/asm/string_64.h | 10 +-
arch/x86/include/asm/uaccess_64.h | 14 +++
arch/x86/lib/memcpy_64.S | 112 ++++++++---------
arch/x86/lib/usercopy_64.c | 21 ++++
drivers/acpi/nfit/core.c | 11 --
drivers/dax/super.c | 33 +++--
drivers/md/dm-linear.c | 16 +++
drivers/md/dm-log-writes.c | 15 +++
drivers/md/dm-stripe.c | 21 ++++
drivers/md/dm.c | 25 ++++
drivers/nvdimm/bus.c | 19 ++-
drivers/nvdimm/claim.c | 3 +-
drivers/nvdimm/e820.c | 41 +++---
drivers/nvdimm/pfn_devs.c | 2 -
drivers/nvdimm/pmem.c | 52 ++++++--
drivers/nvdimm/region_devs.c | 3 +-
drivers/s390/block/dcssblk.c | 7 ++
fs/Kconfig | 1 +
fs/dax.c | 136 ++++++++++++++++----
fs/xfs/xfs_file.c | 72 ++++++++++-
fs/xfs/xfs_inode.h | 16 +++
fs/xfs/xfs_ioctl.c | 8 +-
fs/xfs/xfs_iops.c | 16 ++-
fs/xfs/xfs_pnfs.c | 15 +--
fs/xfs/xfs_pnfs.h | 5 +-
include/linux/dax.h | 12 ++
include/linux/device-mapper.h | 5 +-
include/linux/memremap.h | 36 ++----
include/linux/mm.h | 71 ++++++++---
include/linux/string.h | 4 +-
include/linux/uio.h | 15 +++
kernel/Makefile | 3 +-
kernel/iomem.c | 167 ++++++++++++++++++++++++
kernel/memremap.c | 210 +++++--------------------------
kernel/resource.c | 1 +
lib/Kconfig | 3 +
lib/iov_iter.c | 61 +++++++++
mm/Kconfig | 5 +
mm/gup.c | 36 ++++--
mm/hmm.c | 13 +-
mm/swap.c | 3 +-
tools/testing/nvdimm/test/nfit.c | 104 +++++++++++++++
47 files changed, 1092 insertions(+), 446 deletions(-)
create mode 100644 Documentation/ABI/removed/sysfs-bus-nfit
create mode 100644 arch/x86/include/asm/mcsafe_test.h
create mode 100644 kernel/iomem.c
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