Re: [Qemu-devel] [PATCH v6 48/49] linux-user: Split out ioctl

[Richard Henderson]

On 2/13/19 3:46 AM, Laurent Vivier wrote:
> On 13/02/2019 14:09, Laurent Vivier wrote:
>> Hi,
>>
>> this one is really a cut'n'paste but it introduces a problem with 
>> qemu-alpha, I don't know how/why:
>>
>>   $ sudo unshare --ipc --uts --pid --fork --kill-child --mount chroot 
>> chroot/alpha/sid/
>>   Unsupported ioctl: cmd=0x80047476
>>
>> And then it hangs.
>>
>> I'll try to debug.
> 
> In fact it happens with sid, with ppc64 too, but not with m68k and sh4.
> 
> And only with "unshare --pid --fork".
> 
> Without "unshare", the result is:
> 
>   Unsupported ioctl: cmd=0x80047476
>   bash: cannot set terminal process group (11507): Function not implemented
>   bash: no job control in this shell
>   Unsupported ioctl: cmd=0x80087467
>   Unsupported ioctl: cmd=0x80087467
>   Unsupported ioctl: cmd=0x802c7415

I'm just now getting back to this, and cannot replicate the issue, at least
rebased onto master.  With or without unshare, I see your "without unshare"
results.

The rebase onto master is at

  https://github.com/rth7680/qemu.git lu-split-6


r~