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migration/multifd: Implement zero page transmission on the multifd thread.

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1. Add zero_pages field in MultiFDPacket_t.
2. Implements the zero page detection and handling on the multifd
threads for non-compression, zlib and zstd compression backends.
3. Added a new value 'multifd' in ZeroPageDetection enumeration.
4. Adds zero page counters and updates multifd send/receive tracing
format to track the newly added counters.

Signed-off-by: Hao Xiang <hao.xiang@bytedance.com>
Acked-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Fabiano Rosas <farosas@suse.de>
Link: https://lore.kernel.org/r/20240311180015.3359271-5-hao.xiang@linux.dev
Signed-off-by: Peter Xu <peterx@redhat.com>
This commit is contained in:
Hao Xiang
2024-03-11 18:00:12 +00:00
committed by Peter Xu
parent 5fdbb1dfcc
commit 303e6f54f9
10 changed files with 228 additions and 32 deletions
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2
hw/core/qdev-properties-system.c
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@@ -696,7 +696,7 @@ const PropertyInfo qdev_prop_granule_mode = {
const PropertyInfo qdev_prop_zero_page_detection = {
.name = "ZeroPageDetection",
.description = "zero_page_detection values, "
"none,legacy",
"none,legacy,multifd",
.enum_table = &ZeroPageDetection_lookup,
.get = qdev_propinfo_get_enum,
.set = qdev_propinfo_set_enum,