Re: [PATCH] selftests: ublk: kublk: improve behavior on init failure

[Ming Lei]

On Tue, Jun 03, 2025 at 05:38:33PM -0600, Uday Shankar wrote:
> Some failure modes are handled poorly by kublk. For example, if ublk_drv
> is built as a module but not currently loaded into the kernel, ./kublk
> add ... just hangs forever. This happens because in this case (and a few
> others), the worker process does not notify its parent (via a write to
> the shared eventfd) that it has tried and failed to initialize, so the
> parent hangs forever. Fix this by ensuring that we always notify the
> parent process of any initialization failure, and have the parent print
> a (not very descriptive) log line when this happens.
> 
> Signed-off-by: Uday Shankar <ushankar@xxxxxxxxxxxxxxx>

Reviewed-by: Ming Lei <ming.lei@xxxxxxxxxx>

Thanks,
Ming