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migration: Rename thread debug names

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The postcopy thread names on dest QEMU are slightly confusing, partly I'll
need to blame myself on 36f62f11e4 ("migration: Postcopy preemption
preparation on channel creation").  E.g., "fault-fast" reads like a fast
version of "fault-default", but it's actually the fast version of
"postcopy/listen".

Taking this chance, rename all the migration threads with proper rules.
Considering we only have 15 chars usable, prefix all threads with "mig/",
meanwhile identify src/dst threads properly this time.  So now most thread
names will look like "mig/DIR/xxx", where DIR will be "src"/"dst", except
the bg-snapshot thread which doesn't have a direction.

For multifd threads, making them "mig/{src|dst}/{send|recv}_%d".

We used to have "live_migration" thread for a very long time, now it's
called "mig/src/main".  We may hope to have "mig/dst/main" soon but not
yet.

Reviewed-by: Fabiano Rosas <farosas@suse.de>
Reviewed-by: Zhijian Li (Fujitsu) <lizhijian@fujitsu.com>
Signed-off-by: Peter Xu <peterx@redhat.com>
Signed-off-by: Fabiano Rosas <farosas@suse.de>
This commit is contained in:
Peter Xu 2024-06-19 18:30:37 -04:00 • committed by Fabiano Rosas
parent 637280aeb2
commit 60ce47675d
5 changed files with 10 additions and 10 deletions
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6
migration/migration.c
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@ -2431,7 +2431,7 @@ static int open_return_path_on_source(MigrationState *ms)
trace_open_return_path_on_source();
qemu_thread_create(&ms->rp_state.rp_thread, "return path",
qemu_thread_create(&ms->rp_state.rp_thread, "mig/src/rp-thr",
source_return_path_thread, ms, QEMU_THREAD_JOINABLE);
ms->rp_state.rp_thread_created = true;
@ -3770,10 +3770,10 @@ void migrate_fd_connect(MigrationState *s, Error *error_in)
}
if (migrate_background_snapshot()) {
qemu_thread_create(&s->thread, "bg_snapshot",
qemu_thread_create(&s->thread, "mig/snapshot",
bg_migration_thread, s, QEMU_THREAD_JOINABLE);
} else {
qemu_thread_create(&s->thread, "live_migration",
qemu_thread_create(&s->thread, "mig/src/main",
migration_thread, s, QEMU_THREAD_JOINABLE);
}
s->migration_thread_running = true;