Re: [PATCH 5.8 000/186] 5.8.8-rc1 review

From: Guenter Roeck
Date: Wed Sep 09 2020 - 12:48:04 EST

On Tue, Sep 08, 2020 at 05:22:22PM +0200, Greg Kroah-Hartman wrote:
> This is the start of the stable review cycle for the 5.8.8 release.
> There are 186 patches in this series, all will be posted as a response
> to this one. If anyone has any issues with these being applied, please
> let me know.
> Responses should be made by Thu, 10 Sep 2020 15:21:57 +0000.
> Anything received after that time might be too late.

Build results:
total: 154 pass: 153 fail: 1
Failed builds:
Qemu test results:
total: 430 pass: 430 fail: 0

The powerpc problem is the same as before:

Inconsistent kallsyms data
Try make KALLSYMS_EXTRA_PASS=1 as a workaround

KALLSYMS_EXTRA_PASS=1 doesn't help. The problem is sporadic, elusive, and all
but impossible to bisect. The same build passes on another system, for example,
with a different load pattern. It may pass with -j30 and fail with -j40.
The problem started at some point after v5.8, and got worse over time; by now
it almost always happens. I'd be happy to debug if there is a means to do it,
but I don't have an idea where to even start. I'd disable KALLSYMS in my
test configurations, but the symbol is selected from various places and thus
difficult to disable. So unless I stop building ppc:allmodconfig entirely
we'll just have to live with the failure.

Tested-by: Guenter Roeck <linux@xxxxxxxxxxxx>