diff options
| -rw-r--r-- | blockdev.c | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/blockdev.c b/blockdev.c index ea7f3974e2..6ccb8e1f84 100644 --- a/blockdev.c +++ b/blockdev.c @@ -3371,7 +3371,17 @@ void do_blockdev_backup(const char *device, const char *target, goto out; } - bdrv_set_aio_context(target_bs, aio_context); + if (bdrv_get_aio_context(target_bs) != aio_context) { + if (!bdrv_has_blk(target_bs)) { + /* The target BDS is not attached, we can safely move it to another + * AioContext. */ + bdrv_set_aio_context(target_bs, aio_context); + } else { + error_setg(errp, "Target is attached to a different thread from " + "source."); + goto out; + } + } backup_start(bs, target_bs, speed, sync, NULL, on_source_error, on_target_error, block_job_cb, bs, txn, &local_err); if (local_err != NULL) { |