Commit 9adc1cb49af8d fixed a bug about unaligned (to dirty bitmap
granularity) guest writes (and discards) by simply requesting
corresponding alignment on mirror-top filter. However forcing large
alignment obviously decreases performance of unaligned requests.
So it's time for a new solution which is in 04. And 05 reverts
9adc1cb49af8d.
v2:
01: new fix (do we need it for stable?)
02,03,05: add Max's r-b
04: fix bitmap handling
improve comments
Vladimir Sementsov-Ogievskiy (5):
hbitmap: handle set/reset with zero length
block/mirror: simplify do_sync_target_write
block/block-backend: add blk_co_pwritev_part
block/mirror: support unaligned write in active mirror
Revert "mirror: Only mirror granularity-aligned chunks"
include/sysemu/block-backend.h | 4 +
block/block-backend.c | 17 +++-
block/mirror.c | 181 ++++++++++++++++-----------------
util/hbitmap.c | 8 ++
4 files changed, 114 insertions(+), 96 deletions(-)
--
2.21.0
