Re: [PATCH] null_blk: allow teardown on request timeout

[Bart Van Assche]

On 10/15/22 22:20, Chaitanya Kulkarni wrote:
> In current timeout implementation null_blk just completes the request
> with error=BLK_STS_TIMEOUT without doing any cleanup, hence device
> cleanup code including handling inflight requests on timeout and
> teardown is never exercised.

Hi Chaitanya,

How about removing that code instead of adding a mechanism for 
triggering it?

> Add a module parameter rq_abort_limit to allow null_blk perform device
> cleanup when time out occurs. The non zero value of this parameter
> allows user to set the number of timeouts to occur before triggering
> cleanup/teardown work.

As Ming Lei wrote, there are no other block drivers that destroy 
themselves if a certain number of timeouts occur. It seems weird to me 
to trigger self-removal from inside a timeout handler.

Thanks,

Bart.