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    SubjectRe: [patch 4/5] fail-injection capability for disk IO
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    Akinobu Mita <mita@miraclelinux.com> 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.

    -Andi
    -
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