[PATCH v4 0/7] DAX poison recovery

[Jane Chu]

In this series, dax recovery code path is independent of that of
normal write. Competing dax recovery threads are serialized,
racing read threads are guaranteed not overlapping with the
recovery process.

In this phase, the recovery granularity is page, future patch
will explore recovery in finer granularity.

Change from v3:
  Rebased to v5.17-rc1-81-g0280e3c58f92

v3:
https://lkml.org/lkml/2022/1/11/900
v2:
https://lore.kernel.org/all/20211106011638.2613039-1-jane.chu@xxxxxxxxxx/
Disussions about marking poisoned page as 'np':
https://lore.kernel.org/all/CAPcyv4hrXPb1tASBZUg-GgdVs0OOFKXMXLiHmktg_kFi7YBMyQ@xxxxxxxxxxxxxx/

Jane Chu (7):
  mce: fix set_mce_nospec to always unmap the whole page
  dax: introduce dax device flag DAXDEV_RECOVERY
  dm: make dm aware of target's DAXDEV_RECOVERY capability
  dax: add dax_recovery_write to dax_op and dm target type
  pmem: add pmem_recovery_write() dax op
  dax: add recovery_write to dax_iomap_iter in failure path
  pmem: fix pmem_do_write() avoid writing to 'np' page

 arch/x86/include/asm/set_memory.h | 17 ++----
 arch/x86/kernel/cpu/mce/core.c    |  6 +-
 arch/x86/mm/pat/set_memory.c      |  8 ++-
 drivers/dax/super.c               | 41 +++++++++++++
 drivers/md/dm-linear.c            | 12 ++++
 drivers/md/dm-log-writes.c        | 12 ++++
 drivers/md/dm-stripe.c            | 13 ++++
 drivers/md/dm-table.c             | 33 +++++++++++
 drivers/md/dm.c                   | 27 +++++++++
 drivers/nvdimm/pmem.c             | 99 ++++++++++++++++++++++++++++---
 drivers/nvdimm/pmem.h             |  1 +
 fs/dax.c                          | 23 ++++++-
 include/linux/dax.h               | 33 +++++++++++
 include/linux/device-mapper.h     |  9 +++
 include/linux/set_memory.h        |  2 +-
 15 files changed, 309 insertions(+), 27 deletions(-)

-- 
2.18.4