[Qemu-devel] [PATCH v2 00/15] RCUification of the memory API, parts 1 and 2

[Paolo Bonzini <pbonzini@redhat.com>]

Part 1 is patches 1-7, part 2 is patches 8-15.

Part 1 changes requested by reviewers were minimal, but no one really
provided a Reviewed-by so I'm reposting.  The idea is to send a pull
request for part 1 soon.

These two parts are enough of a base for Stefan's work on thread-safe
migration bitmaps.

Part 3 (in the works) will separate removal and reclamation of device
data.  Part 4 (already done) will switch KVM MMIO and PIO to unlocked
lookup and convert a single device to unlocked access.

Changes in part 1:

- patch 1: left aside for later (Peter)

- patch 2 (now patch 1): two small doc fixes (Fam)

- patch 3 (now patch 2): do not do both short and long tests (Fam)
                         do not drop rcu_register_thread in rcu_init (Fam)

TCG folks, please review patches 8 and 9.  Note that they are not
yet ready for multiple TCG threads.

Paolo


Jan Kiszka (1):
  memory: remove assertion on memory_region_destroy

Mike Day (4):
  rcu: introduce RCU-enabled QLIST
  cosmetic changes preparing for the following patches
  exec: convert ram_list to QLIST
  Convert ram_list to RCU

Paolo Bonzini (10):
  rcu: add rcu library
  rcu: add rcutorture
  rcu: allow nesting of rcu_read_lock/rcu_read_unlock
  rcu: add call_rcu
  memory: protect current_map by RCU
  memory: avoid ref/unref in memory_region_find
  exec: introduce cpu_reload_memory_map
  exec: make iotlb RCU-friendly
  exec: RCUify AddressSpaceDispatch
  exec: protect mru_block with RCU

 arch_init.c                  |  66 ++++---
 cpu-exec.c                   |  21 ++
 cpus.c                       |   2 +-
 cputlb.c                     |  13 +-
 docs/rcu.txt                 | 387 ++++++++++++++++++++++++++++++++++++
 exec.c                       | 304 +++++++++++++++++++----------
 hw/9pfs/virtio-9p-synth.c    |   3 +-
 hw/i386/intel_iommu.c        |   3 +
 hw/pci-host/apb.c            |   1 +
 hw/ppc/spapr_iommu.c         |   1 +
 include/exec/cpu-all.h       |  13 +-
 include/exec/cputlb.h        |   2 +-
 include/exec/exec-all.h      |   5 +-
 include/exec/memory.h        |   5 +
 include/qemu/atomic.h        |  61 ++++++
 include/qemu/queue.h         |  24 +--
 include/qemu/rcu.h           | 147 ++++++++++++++
 include/qemu/rcu_queue.h     | 134 +++++++++++++
 include/qemu/thread.h        |   3 -
 include/qom/cpu.h            |   1 +
 memory.c                     |  60 +++---
 scripts/dump-guest-memory.py |   8 +-
 softmmu_template.h           |   4 +-
 tests/Makefile               |  10 +-
 tests/rcutorture.c           | 452 +++++++++++++++++++++++++++++++++++++++++++
 tests/test-rcu-list.c        | 326 +++++++++++++++++++++++++++++++
 util/Makefile.objs           |   1 +
 util/rcu.c                   | 291 ++++++++++++++++++++++++++++
 28 files changed, 2148 insertions(+), 200 deletions(-)
 create mode 100644 docs/rcu.txt
 create mode 100644 include/qemu/rcu.h
 create mode 100644 include/qemu/rcu_queue.h
 create mode 100644 tests/rcutorture.c
 create mode 100644 tests/test-rcu-list.c
 create mode 100644 util/rcu.c

-- 
1.8.3.1