On Mon, Oct 18, 2021 at 12:43:38PM +0800, Zqiang wrote: > This is the details of the test, Hope it helps you Call me stupid, but I can only find the trace and linked to unreadable google sites that wan't me to log in somehow and no actual details. If you have a direct link to the reproducer (an attachment would do it as well) I'd love to try it myself. Otherwise this commit in the block-5.15 tree should help to catch what I suspect is the root cause (final ref drop before unregister) earlier and with a better backtrace: https://git.kernel.dk/cgit/linux-block/commit/?h=block-5.15&id=a20417611b98e12a724e5c828c472ea16990b71f
