[LTP] [PATCH v3 2/2] syscalls/ioctl_loop05: Using LOOP_CONFIGURE to set direct io

[Cyril Hrubis]

Hi!
> +	/*
> +	 * When we call loop_configure ioctl successfully and detach it,
> +	 * the subquent loop_configure without non-zero lo_offset or
> +	 * sizelimit may trigger the blk_update_request I/O error.
> +	 * To avoid this, sleep 1s to ensure last blk_update_request has
> +	 * completed.
> +	 */
> +	sleep(1);

This sounds to me like a kernel bug. Have you tried asking kernel
developers if this is expected behavior before we attempt work around
the problem in tests?

-- 
Cyril Hrubis
chrubis@suse.cz