Re: [patch 4/5] fail-injection capability for disk IO
From: Jens Axboe
Date: Wed Aug 23 2006 - 08:05:34 EST
On Wed, Aug 23 2006, Andi Kleen wrote:
> Akinobu Mita <mita@xxxxxxxxxxxxxxxx> writes:
> > * @bio: The bio describing the location in memory and on the device.
> > @@ -3077,6 +3093,9 @@ end_io:
> > if (unlikely(test_bit(QUEUE_FLAG_DEAD, &q->queue_flags)))
> > goto end_io;
> > + if (should_fail(fail_make_request, bio->bi_size))
> > + goto end_io;
> AFAIK it is reasonably easy to write stacking block drivers.
> I think I would prefer a stackable driver instead of this hook.
But that makes it more tricky to setup a test, since you have to change
from using /dev/sda (for example) to /dev/stacked-driver.
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