https://bugzilla.kernel.org/show_bug.cgi?id=98051 I'm not sure what the expected behavior is here, because a file system can only do so much to deal with bugs in the device (or USB bridge chipsets). But my gut instinct is that I shouldn't get a return to prompt from umount until it's safe to disconnect the device. This error suggests otherwise. YetI have no idea how long I'd have to wait to avoid this message, which doesn't always happen. This is not a regression, I've seen it before. So far there's been no complaints on normal remount or btrfs check, so despite the 1 flush being dropped (?) the file system is consistent. -- Chris Murphy -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
