Re: Regression with a0747a859ef6 ("bdi: add error handle for bdi_debug_register")

[weiping zhang]

2017-12-21 23:18 GMT+08:00 Bruno Wolff III <bruno@xxxxxxxx>:
> On Thu, Dec 21, 2017 at 22:01:33 +0800,
>  weiping zhang <zwp10758@xxxxxxxxx> wrote:
>>
>> Hi,
>> how do you do bisect ?build all kernel commit one by one ?
>> as you did before:
>> https://bugzilla.redhat.com/show_bug.cgi?id=1520982
>
>
> I just did the one bisect using Linus' tree. After each build, I would do a
> test boot and see if the boot was normal or if I got errors and an eventual
> hang before boot.
>
> Since then I have used git revert to revert just the problem commit from
> later kernels (such as v4.15-rc4) and when I do the system boots normally.
> And when I don't do the revert or just use stock Fedora kernels the problem
> occurs every time.
does every time boot fail can trigger WANRING in device_add_disk ?