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    SubjectRe: ext4: WARNING: CPU: 10 PID: 23340 at fs/block_dev.c
    On Thu, Apr 09, 2015 at 11:19:45AM -0400, Sasha Levin wrote:
    >
    > Nope, I just got new servers to play with and decided to try xfstests.
    >
    > I can try bisection if it doesn't sound familiar, but since it's metal
    > servers it'll take a while.

    It's in the "dangerous" group, which may very well mean that it's
    known to cause systems to crash. In general I tend to run either
    "check -g quick" as a smoke test, or "check -g auto" with a variety of
    different ext4 configurations. The former takes about 30 minuts, and
    the latter (given my current list of test configs) takes a bit under
    24 hours.

    I tried manually running generic/019, and even though I have
    CONFIG_FAIL_MAKE_REQUEST defined, /sys/kernel/debug/fail_make_request
    isn't present, and so the test complains that I haven't compiled it
    into my kernel --- even though /proc/config.gz confirms that it is
    enabled.

    Is there anything special I have to do to get generic/019 to run?

    Thanks,

    - Ted

    P.S. I have provided for ext4 developers are preconfigured kvm test
    image that makes it very easy to do tests without needing to use bare
    metal; let me know if you're interested in getting a quick start to
    our setup.



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