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Subject[PATCH v3 00/15] block, dax updates for 4.4
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Date
Changes since v2: [1]

1/ Include a fix to revoke dax-mappings at device teardown time

2/ Include a blkdev_issue_flush implementation for pmem

3/ New block device ioctls to set/query dax mode, make dax opt-in

4/ Collect reviewed-by's

[1]: https://lists.01.org/pipermail/linux-nvdimm/2015-October/002538.html

---

There were several topics developed during this cycle, some are ready
and some are not. The items needing more review and testing are the
pmem+dax updates with mm, ext4, and xfs dependencies. Topics like the
dax locking reworks, dax get_user_pages, and write-protecting dax ptes
after fsync/msync.

Instead, this more conservative set represents the fs and mm independent
updates to dax and pmem:

1/ Enable dax mappings for raw block devices

2/ Use blk_queue_{enter|exit} and the availability of 'struct page' to
fix lifetime issues and races with unloading the pmem driver.

3/ Enable blkdev_issue_flush to fix legacy apps that may dirty pmem via
dax mmap I/O. Although legacy environments should consider disabling
dax for apps that don't expect it.

These depend on the latest 'libnvdimm-for-next' branch from nvdimm.git
and the 'for-4.4/integrity' branch from Jens' tree. All but the last
three have been out for review previously, and I am looking to submit
them towards the back half of the merge window.

---

Dan Williams (15):
pmem, dax: clean up clear_pmem()
dax: increase granularity of dax_clear_blocks() operations
block, dax: fix lifetime of in-kernel dax mappings with dax_map_atomic()
libnvdimm, pmem: move request_queue allocation earlier in probe
libnvdimm, pmem: fix size trim in pmem_direct_access()
um: kill pfn_t
kvm: rename pfn_t to kvm_pfn_t
mm, dax, pmem: introduce pfn_t
block: notify queue death confirmation
dax, pmem: introduce zone_device_revoke() and devm_memunmap_pages()
block: introduce bdev_file_inode()
block: enable dax for raw block devices
block, dax: make dax mappings opt-in by default
dax: dirty extent notification
pmem: blkdev_issue_flush support


arch/arm/include/asm/kvm_mmu.h | 5 -
arch/arm/kvm/mmu.c | 10 +
arch/arm64/include/asm/kvm_mmu.h | 3
arch/mips/include/asm/kvm_host.h | 6 -
arch/mips/kvm/emulate.c | 2
arch/mips/kvm/tlb.c | 14 +-
arch/powerpc/include/asm/kvm_book3s.h | 4 -
arch/powerpc/include/asm/kvm_ppc.h | 2
arch/powerpc/kvm/book3s.c | 6 -
arch/powerpc/kvm/book3s_32_mmu_host.c | 2
arch/powerpc/kvm/book3s_64_mmu_host.c | 2
arch/powerpc/kvm/e500.h | 2
arch/powerpc/kvm/e500_mmu_host.c | 8 +
arch/powerpc/kvm/trace_pr.h | 2
arch/powerpc/sysdev/axonram.c | 11 +
arch/um/include/asm/page.h | 6 -
arch/um/include/asm/pgtable-3level.h | 4 -
arch/um/include/asm/pgtable.h | 2
arch/x86/include/asm/cacheflush.h | 4 +
arch/x86/include/asm/pmem.h | 7 -
arch/x86/kvm/iommu.c | 11 +
arch/x86/kvm/mmu.c | 37 +++--
arch/x86/kvm/mmu_audit.c | 2
arch/x86/kvm/paging_tmpl.h | 6 -
arch/x86/kvm/vmx.c | 2
arch/x86/kvm/x86.c | 2
block/blk-core.c | 13 +-
block/blk-mq.c | 19 ++-
block/blk.h | 13 --
block/ioctl.c | 42 ++++++
drivers/block/brd.c | 10 +
drivers/nvdimm/pmem.c | 247 ++++++++++++++++++++++++++++-----
drivers/s390/block/dcssblk.c | 13 +-
fs/block_dev.c | 159 ++++++++++++++++++---
fs/dax.c | 242 ++++++++++++++++++++++----------
include/linux/blkdev.h | 41 +++++
include/linux/fs.h | 11 +
include/linux/io.h | 17 --
include/linux/kvm_host.h | 37 +++--
include/linux/kvm_types.h | 2
include/linux/mm.h | 90 ++++++++++++
include/linux/pfn.h | 9 +
include/uapi/linux/fs.h | 2
kernel/memremap.c | 98 +++++++++++++
virt/kvm/kvm_main.c | 47 +++---
45 files changed, 949 insertions(+), 325 deletions(-)


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