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06064a6715
qemu/migration
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Peter Xu 06064a6715 migration: Recover behavior of preempt channel creation for pre-7.2 
In 8.0 devel window we reworked preempt channel creation, so that there'll
be no race condition when the migration channel and preempt channel got
established in the wrong order in commit 5655aab079.

However no one noticed that the change will also be not compatible with
older qemus, majorly 7.1/7.2 versions where preempt mode started to be
supported.

Leverage the same pre-7.2 flag introduced in the previous patch to recover
the behavior hopefully before 8.0 releases, so we don't break migration
when we migrate from 8.0 to older qemu binaries.

Fixes: 5655aab079 ("migration: Postpone postcopy preempt channel to be after main")
Signed-off-by: Peter Xu <peterx@redhat.com>
Reviewed-by: Juan Quintela <quintela@redhat.com>
Signed-off-by: Juan Quintela <quintela@redhat.com>
2023-04-12 21:44:56 +02:00
..
block-dirty-bitmap.c migration: Rename res_{postcopy,precopy}_only 2023-02-15 20:04:30 +01:00
block.c migration/block: replace uses of blk_nb_sectors that do not check result 2023-04-11 16:40:53 +02:00
block.h migration: disable auto-converge during bulk block migration 2017-09-27 11:27:14 +01:00
channel-block.c io: Add support for MSG_PEEK for socket channel 2023-02-06 19:22:56 +01:00
channel-block.h migration: introduce a QIOChannel impl for BlockDriverState VMState 2022-06-22 19:33:43 +01:00
channel.c migration: check magic value for deciding the mapping of channels 2023-02-06 19:22:57 +01:00
channel.h migration: check magic value for deciding the mapping of channels 2023-02-06 19:22:57 +01:00
colo-failover.c migration/colo: Improve an x-colo-lost-heartbeat error message 2023-02-23 14:10:17 +01:00
colo.c error: Drop superfluous #include "qapi/qmp/qerror.h" 2023-02-23 13:56:14 +01:00
dirtyrate.c *: Add missing includes of qemu/error-report.h 2023-03-22 15:06:57 +00:00
dirtyrate.h migration/dirtyrate: Refactor dirty page rate calculation 2022-07-20 12:15:08 +01:00
exec.c *: Add missing includes of qemu/error-report.h 2023-03-22 15:06:57 +00:00
exec.h migration: Export exec.c functions in its own file 2017-06-01 18:49:22 +02:00
fd.c monitor: Use getter/setter functions for cur_mon 2020-10-09 07:08:19 +02:00
fd.h migration: Fix fd protocol for incoming defer 2019-06-05 12:43:55 +02:00
global_state.c migration: Silence compiler warning in global_state_store_running() 2020-10-02 12:28:48 +01:00
meson.build migration: Introduce interface query-migrationthreads 2023-02-06 19:22:57 +01:00
migration-hmp-cmds.c error: Drop superfluous #include "qapi/qmp/qerror.h" 2023-02-23 13:56:14 +01:00
migration.c migration: Recover behavior of preempt channel creation for pre-7.2 2023-04-12 21:44:56 +02:00
migration.h migration: Recover behavior of preempt channel creation for pre-7.2 2023-04-12 21:44:56 +02:00
multifd-zlib.c multifd: Create page_size fields into both MultiFD{Recv,Send}Params 2022-12-15 10:30:37 +01:00
multifd-zstd.c multifd: Create page_size fields into both MultiFD{Recv,Send}Params 2022-12-15 10:30:37 +01:00
multifd.c migration/multifd: correct multifd_send_thread to trace the flags 2023-03-16 16:07:07 +01:00
multifd.h migration/multifd: Move load_cleanup inside incoming_state_destroy 2023-02-13 03:45:40 +01:00
page_cache.c migration: Fix cache_init()'s "Failed to allocate" error messages 2021-02-08 11:19:51 +00:00
page_cache.h migration: Clean up signed vs. unsigned XBZRLE cache-size 2021-02-08 11:19:51 +00:00
postcopy-ram.c migration: Recover behavior of preempt channel creation for pre-7.2 2023-04-12 21:44:56 +02:00
postcopy-ram.h migration: Postpone postcopy preempt channel to be after main 2023-02-11 16:51:09 +01:00
qemu-file.c migration/qemu-file: Add qemu_file_get_to_fd() 2023-02-15 19:09:25 +01:00
qemu-file.h migration/qemu-file: Add qemu_file_get_to_fd() 2023-02-15 19:09:25 +01:00
ram.c migration: Rename res_{postcopy,precopy}_only 2023-02-15 20:04:30 +01:00
ram.h migration: Use atomic ops properly for page accountings 2022-12-15 10:30:37 +01:00
rdma.c migration/rdma: Remove deprecated variable rdma_return_path 2023-03-16 16:07:07 +01:00
rdma.h migration: Export rdma.c functions in its own file 2017-06-01 18:49:23 +02:00
savevm.c migration: Rename res_{postcopy,precopy}_only 2023-02-15 20:04:30 +01:00
savevm.h migration: Rename res_{postcopy,precopy}_only 2023-02-15 20:04:30 +01:00
socket.c migration: Postcopy preemption preparation on channel creation 2022-07-20 12:15:08 +01:00
socket.h migration: Postcopy preemption preparation on channel creation 2022-07-20 12:15:08 +01:00
target.c migration: fix populate_vfio_info 2023-03-16 16:07:07 +01:00
threadinfo.c migration: Introduce interface query-migrationthreads 2023-02-06 19:22:57 +01:00
threadinfo.h migration: Introduce interface query-migrationthreads 2023-02-06 19:22:57 +01:00
tls.c cleanup: Tweak and re-run return_directly.cocci 2022-12-14 16:19:35 +01:00
tls.h migration: Add helpers to detect TLS capability 2022-07-20 12:15:08 +01:00
trace-events migration: Remove unused res_compatible 2023-02-15 20:04:30 +01:00
trace.h trace: switch position of headers to what Meson requires 2020-08-21 06:18:24 -04:00
vmstate-types.c Move CPU softfloat unions to cpu-float.h 2022-04-06 14:31:43 +02:00
vmstate.c migration: Add canary to VMSTATE_END_OF_LIST 2023-02-06 19:22:56 +01:00
xbzrle.c migration/xbzrle: fix out-of-bounds write with axv512 2023-03-16 16:07:07 +01:00
xbzrle.h AVX512 support for xbzrle_encode_buffer 2023-02-11 16:51:09 +01:00
yank_functions.c migration: Move the yank unregister of channel_close out 2021-07-26 12:45:03 +01:00
yank_functions.h migration: Move the yank unregister of channel_close out 2021-07-26 12:45:03 +01:00