linux-kernel - Re: [PATCH 1/2] powerpc/entry: convert to common and generic entry

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Message-ID: <9B5E7C0A7C4BFBF0+ZuTzanfk7BcYoFas@HX09040029.powercore.com.cn>
Date: Sat, 14 Sep 2024 10:22:34 +0800
From: Luming Yu <luming.yu@...ngroup.cn>
To: Christophe Leroy <christophe.leroy@...roup.eu>
Cc: linuxppc-dev@...ts.ozlabs.org, linux-kernel@...r.kernel.org,
	mpe@...erman.id.au, npiggin@...il.com, jialong.yang@...ngroup.cn,
	luming.yu@...il.com
Subject: Re: [PATCH 1/2] powerpc/entry: convert to common and generic entry

On Fri, Sep 13, 2024 at 02:15:40PM +0200, Christophe Leroy wrote:
> 
> 
> Le 13/09/2024 à 14:02, Luming Yu a écrit :
> 
> > > ...
> > > nothing happens after that.
> > reproduced with ppc64_defconfig
> > [    0.818972][    T1] Run /init as init process
> > [    5.851684][  T240] request_module: modprobe binfmt-4c46 cannot be processed, kmod busy with 50 threads for more than 5 seconds now
> > [    5.851742][  T240] kworker/u33:18 (240) used greatest stack depth: 13584 bytes left
> > [    5.860081][  T232] kworker/u33:16 (232) used greatest stack depth: 13072 bytes left
> > [    5.863145][  T210] kworker/u35:13 (210) used greatest stack depth: 12928 bytes left
> > [    5.865000][    T1] Failed to execute /init (error -8)
> > [    5.868897][    T1] Run /sbin/init as init process
> > [   10.891673][  T315] request_module: modprobe binfmt-4c46 cannot be processed, kmod busy with 50 threads for more than 5 seconds now
> > [   10.894036][    T1] Starting init: /sbin/init exists but couldn't execute it (error -8)
> > [   10.901455][    T1] Run /etc/init as init process
> > [   10.903154][    T1] Run /bin/init as init process
> > [   10.904747][    T1] Run /bin/sh as init process
> > [   15.931679][  T367] request_module: modprobe binfmt-4c46 cannot be processed, kmod busy with 50 threads for more than 5 seconds now
> > [   15.934689][    T1] Starting init: /bin/sh exists but couldn't execute it (error -8)
> 
> That's something different, this is because you built a big-endian kernel
> and you are trying to run a little-endian userspace.
okay
> 
> Does it work with ppc64le_defconfig ?
make ppc64le_defconfig

yes, it builds && boots just fine.
the host is a p8 powernv system , the qemu command line is as below:
qemu-system-ppc64 -m 64g -smp 16,cores=4,threads=4 --enable-kvm  -nographic -net nic -net tap,ifname=tap0,script=/etc/qemu-ifup-nat,downscript=/etc/qemu-ifdown-nat  Downloads/Fedora-Cloud-Base-38-1.6.ppc64le.qcow2

I will try other test configures as well.
> 
> On my side there is absolutely nothing happening after the last line, the
> screen remains steady.
> 
> 
> Christophe
>