Re: Linux 6.11-rc1

[Guenter Roeck]

On 7/31/24 01:21, Borislav Petkov wrote:
> On Tue, Jul 30, 2024 at 04:54:43PM -0700, Linus Torvalds wrote:
> > You also seemed to say that it only happened with some CPU selections.
> > Maybe there's something wrong with the ALTERNATIVE() cleanups - I'm
> > looking at that new "nested alternatives macros" thing, and the odd
> > games we play with the origin and replacement lengths etc.
> >
> > That all looks entirely crazy. That file was hard to read before, now
> > it's just incomprehensible to me.
>
> I'm sorry to hear that. The reason we did it is because it was starting to
> become really unwieldy to add a yet another alternative choice N in an
> ALTERNATIVE_N call...
>
> Anyway, I'll try to reproduce here. In the meantime, can anyone who can
> reproduce - Guenter, Jens - boot that failing kernel with
>
>    debug-alternative=-1
>
> and copy dmesg and vmlinux somewhere for me?
>
> It is a lot of output so make sure to catch it all.
>
> Thx.

See http://server.roeck-us.net/qemu/x86-nosmp/ for images; I copied
vmlinux there as well. Various logs are in
http://server.roeck-us.net/qemu/x86-nosmp/logs/; relevant

log-n270-good		boots
log-pentium2-bad	crashes
cpu-list		List of tested CPUs, with results
			Note that Opteron_G4 and Opteron_G5 are
			broken in upstream qemu since qemu v6.1.

Hope this helps,

Guenter