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migration: Add migration_rp_wait|kick()

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It's just a simple wrapper for rp_sem on either wait() or kick(), make it
even clearer on how it is used.  Prepared to be used even for other things.

Reviewed-by: Fabiano Rosas <farosas@suse.de>
Signed-off-by: Peter Xu <peterx@redhat.com>
Message-ID: <20231004220240.167175-8-peterx@redhat.com>
Signed-off-by: Juan Quintela <quintela@redhat.com>
This commit is contained in:
Peter Xu 2023-10-04 18:02:37 -04:00 • committed by Juan Quintela
parent 1015ff5476
commit 5e79a4bf03
3 changed files with 34 additions and 11 deletions
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14
migration/migration.c
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@ -1763,6 +1763,16 @@ static void mark_source_rp_bad(MigrationState *s)
s->rp_state.error = true;
}
void migration_rp_wait(MigrationState *s)
{
qemu_sem_wait(&s->rp_state.rp_sem);
}
void migration_rp_kick(MigrationState *s)
{
qemu_sem_post(&s->rp_state.rp_sem);
}
static struct rp_cmd_args {
ssize_t len; /* -1 = variable */
const char *name;
@ -1835,7 +1845,7 @@ static int migrate_handle_rp_resume_ack(MigrationState *s, uint32_t value)
MIGRATION_STATUS_POSTCOPY_ACTIVE);
/* Notify send thread that time to continue send pages */
qemu_sem_post(&s->rp_state.rp_sem);
migration_rp_kick(s);
return 0;
}
@ -2464,7 +2474,7 @@ static int postcopy_resume_handshake(MigrationState *s)
qemu_savevm_send_postcopy_resume(s->to_dst_file);
while (s->state == MIGRATION_STATUS_POSTCOPY_RECOVER) {
qemu_sem_wait(&s->rp_state.rp_sem);
migration_rp_wait(s);
}
if (s->state == MIGRATION_STATUS_POSTCOPY_ACTIVE) {