57e05be343
We only need to call both the BlockDriver's callback and the parent
callbacks when going from undrained to drained or vice versa. A second
drain section doesn't make a difference for the driver or the parent,
they weren't supposed to send new requests before and after the second
drain.
One thing that gets in the way is the 'ignore_bds_parents' parameter in
bdrv_do_drained_begin_quiesce() and bdrv_do_drained_end(): It means that
bdrv_drain_all_begin() increases bs->quiesce_counter, but does not
quiesce the parent through BdrvChildClass callbacks. If an additional
drain section is started now, bs->quiesce_counter will be non-zero, but
we would still need to quiesce the parent through BdrvChildClass in
order to keep things consistent (and unquiesce it on the matching
bdrv_drained_end(), even though the counter would not reach 0 yet as
long as the bdrv_drain_all() section is still active).
Instead of keeping track of this, let's just get rid of the parameter.
It was introduced in commit
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.. | ||
avocado | ||
bench | ||
data | ||
decode | ||
docker | ||
fp | ||
guest-debug | ||
image-fuzzer | ||
include | ||
keys | ||
lcitool | ||
migration | ||
multiboot | ||
perf/block/qcow2 | ||
plugin | ||
qapi-schema | ||
qemu-iotests | ||
qtest | ||
rocker | ||
tcg | ||
tsan | ||
uefi-test-tools | ||
unit | ||
vm | ||
vmstate-static-checker-data | ||
check-block.sh | ||
dbus-vmstate-daemon.sh | ||
Makefile.include | ||
meson.build | ||
requirements.txt | ||
test-qht-par.c | ||
vhost-user-bridge.c |