Here are my block mirroring patches for QEMU 1.4, please review.
Patches 1-12 implement improvements and optimizations to the code
that went in 1.3.
Patches 13-20 (lacking tests for now) implement a persistent dirty
bitmap. The bitmap can be used to run storage migration jobs across
multiple executions of the VM or, in the future, offline via qemu-img.
Paolo
Paolo Bonzini (20):
host-utils: add ffsl
add hierarchical bitmap data type and test cases
block: implement dirty bitmap using HBitmap
block: make round_to_clusters public
mirror: perform COW if the cluster size is bigger than the granularity
block: return count of dirty sectors, not chunks
block: allow customizing the granularity of the dirty bitmap
mirror: allow customizing the granularity
mirror: switch mirror_iteration to AIO
mirror: add buf-size argument to drive-mirror
mirror: support more than one in-flight AIO operation
mirror: support arbitrarily-sized iterations
oslib: add a wrapper for mmap/munmap
hbitmap: add hbitmap_alloc_with_data and hbitmap_required_size
hbitmap: add hbitmap_copy
block: split bdrv_enable_dirty_tracking and
bdrv_disable_dirty_tracking
block: support a persistent dirty bitmap
mirror: add support for persistent dirty bitmap
block: choose the default dirty bitmap granularity in
bdrv_enable_dirty_tracking
monitor: add commands to start/stop dirty bitmap
Makefile.objs | 2 +-
block-migration.c | 22 +-
block.c | 279 +++++++++++++++++---------
block.h | 18 +-
block/mirror.c | 393 ++++++++++++++++++++++++++++++------
block_int.h | 15 +-
blockdev.c | 83 ++++++--
blockdev.h | 1 +
hbitmap.c | 485 +++++++++++++++++++++++++++++++++++++++++++++
hbitmap.h | 243 +++++++++++++++++++++++
hmp-commands.hx | 39 ++++
hmp.c | 29 ++-
hmp.h | 2 +
host-utils.h | 26 +++
osdep.h | 10 +
oslib-posix.c | 47 +++++
oslib-win32.c | 59 ++++++
qapi-schema.json | 71 ++++++-
qmp-commands.hx | 75 ++++++-
tests/Makefile | 2 +
tests/qemu-iotests/041 | 52 +++++
tests/qemu-iotests/041.out | 4 +-
tests/test-hbitmap.c | 475 ++++++++++++++++++++++++++++++++++++++++++++
trace-events | 12 ++
24 files changed, 2247 insertions(+), 197 deletions(-)
create mode 100644 hbitmap.c
create mode 100644 hbitmap.h
create mode 100644 tests/test-hbitmap.c
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1.8.0.1
