Bug#993948: kernel/amd64: system hang on HPE ProLiant BL460c Gen9

[YunQiang Su <wzssyqa@gmail.com>]

Yunqiang Su <wzssyqa@gmail.com> 于2021年9月9日周四 上午11:11写道：
>
>
> On Wed, 8 Sep 2021 20:53:27 +0800 YunQiang Su <wzssyqa@gmail.com> wrote:
> > Package: src:linux
> > Version: 5.10
> >
> > After upgrade to bullseyes' kernel, the system always hang after about 10 min
> > with an error from IML log
> >
> > An Unrecoverable System Error (NMI) has occurred (Service Information:
> > 0x00000008, 0x89480000)
> >
> > Kernel 5.14 from experimental also has this problem.
> > Kernel 4.19 works fine.
> > Fedora 34 seems to be working well.
>
> This is the output of dmesg and lspci from both Fedora 34 and Debian bullseye.
> Wish they are useful.
>

Finally, we find the problem:

https://github.com/torvalds/linux/commit/8343b1f8b97ac016150c8303f95b63b20b98edf8
https://github.com/torvalds/linux/commit/65161c35554f7135e6656b3df1ce2c500ca0bdcf

In the first patch:
   They thought `err' is not used at all, and removed it.
In the second patch:
   They add it back and a wrong value "-EINVAL" is given.

Better KPI got.

> >
> > --
> > YunQiang Su
> >
> >



-- 
YunQiang Su