Re: [sparc64] running stress-ng and a sparc64 hardware / kernel woes

[John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de>]

Hi Anatoly!

On 1/3/21 1:56 PM, Anatoly Pugachev wrote:
> Running a simple stress-ng as a non-privileged (non root) user :
> 
> stress-ng --opcode 1 --timeout 60 --metrics-brief
> 
> will almost always bring the linux kernel to an unusable state,
> starting from "Unable to handle kernel NULL pointer dereference",
> "Bogus kernel PC [0000000000000000] in fault handler", "Kernel
> unaligned access at TPC", "Unable to handle kernel paging request at
> virtual address" and "rcu: INFO: rcu_sched detected stalls on
> CPUs/tasks"...

This looks very similar to the kernel crashes on SPARC that we saw on
the buildds for the GCC testsuite in the past (and other packages).

I wonder whether we can use stress-ng to provoke the kernel crash on
POWER when hosting big-endian VMs with high load on little-endian hosts [1].

Adrian

> [1] https://bugzilla.kernel.org/show_bug.cgi?id=206669

-- 
 .''`.  John Paul Adrian Glaubitz
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`. `'   Freie Universitaet Berlin - glaubitz@physik.fu-berlin.de
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