linux-kernel - Re: How to verify linux-next

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Message-ID: <CAOuPNLjECO0ETryR3PmPiTVsU4NU7DvwdG-XD9+kTychUTLULw@mail.gmail.com>
Date:   Fri, 29 Sep 2017 23:23:31 +0530
From:   Pintu Kumar <pintu.ping@...il.com>
To:     Damian Tometzki <damian.tometzki@...oud.com>
Cc:     Valdis Kletnieks <valdis.kletnieks@...edu>,
        linux-kernel@...r.kernel.org, kernelnewbies@...nelnewbies.org
Subject: Re: How to verify linux-next

On Fri, Sep 29, 2017 at 7:56 PM, Pintu Kumar <pintu.ping@...il.com> wrote:
> On Fri, Sep 29, 2017 at 6:44 PM, Damian Tometzki
> <damian.tometzki@...oud.com> wrote:
>> Hello,
>>
>> Ubuntu 16.04 with current linux-next Kernel workson virtualbox 5.1.28
>>
>> Host: Windows 10
>> Guest: Ubuntu 16.04
>>
>> Best regards
>> Damian
>>
>>
>> Am Freitag, den 29.09.2017, 08:41 -0400 schrieb
>> valdis.kletnieks@...edu:
>>> On Fri, 29 Sep 2017 16:08:07 +0530, Pintu Kumar said:
>>>
>>> >
>>> > I have a general question.
>>> > How do we normally verify linux-next tree?
>>> The same exact way you "verify" any other Linux kernel, for whatever
>>> definition of "verify" you plan to use.
>>>
>>> >
>>> > 1) For Oracle virtual box 5.1.26 with ubuntu-32 bit, the linux-next
>>> > kernel is not booting.
>>> Does an Ubuntu kernel boot correctly under VirtualBox?  If not, fix
>>> that issue first.  Also, "is not booting" isn't detailed enough for
>>> anybody
>>> to make even a guess as to what's wrong.
>>>
>>> Also, note that 5.1.28 is out.
>
> Ok, I just updated to 5.1.28. And my Ubuntu version is already 16.04.
> Let me try again if it works.
> Thanks all for your reply.
>

Now, with vbox 5.1.28, I am getting below build failure with linux-next.
Any quick pointers on this, if anybody faced similar issue.

In file included from ./arch/x86/include/asm/atomic.h:7:0,
                 from ./include/linux/atomic.h:4,
                 from ./include/linux/mm_types_task.h:12,
                 from ./include/linux/mm_types.h:4,
                 from arch/x86/kvm/irq.h:25,
                 from arch/x86/kvm/vmx.c:19:
arch/x86/kvm/vmx.c: In function ‘__pi_post_block’:
./arch/x86/include/asm/cmpxchg.h:129:2: warning: ‘__ret’ is used
uninitialized in this function [-Wuninitialized]
  __ret;        \
  ^
./arch/x86/include/asm/cmpxchg.h:86:21: note: ‘__ret’ was declared here
  __typeof__(*(ptr)) __ret;     \
                     ^
./arch/x86/include/asm/cmpxchg.h:133:2: note: in expansion of macro
‘__raw_cmpxchg’
  __raw_cmpxchg((ptr), (old), (new), (size), LOCK_PREFIX)
  ^
./arch/x86/include/asm/cmpxchg.h:148:2: note: in expansion of macro ‘__cmpxchg’
  __cmpxchg(ptr, old, new, sizeof(*(ptr)))
  ^
arch/x86/kvm/vmx.c:11732:11: note: in expansion of macro ‘cmpxchg’
  } while (cmpxchg(&pi_desc->control, old.control,
           ^
  CC      kernel/trace/trace_seq.o
  CC      kernel/trace/trace_stat.o
In function ‘__pi_post_block’,
    inlined from ‘pi_post_block’ at arch/x86/kvm/vmx.c:11831:2,
    inlined from ‘vmx_post_block’ at arch/x86/kvm/vmx.c:11840:2:
./arch/x86/include/asm/cmpxchg.h:127:3: error: call to
‘__cmpxchg_wrong_size’ declared with attribute error: Bad argument
size for cmpxchg
   __cmpxchg_wrong_size();     \
   ^



> BTW, I am more interested in my another query about QEMU arm.
> This will be much quicker and easy for me.
> But the problem is I wanted to use multiple ssh shell on qemu.
> Also I needed a pre-built rootfs image for qemu-arm, cortex-a9
> versatilepb machine.
> It should have networking and ssh built-in so that I can connect to it
> using PUTTY client.
> Note that I could able to build my own minimal busybox and boot qemu
> using linux-next (non graphical mode).
> But I could able to get only one shell.
> I need to test some client/server problem, so I need multiple shell.
> I am not able to configure net/ssh on this qemu system.
>
> So, I have 2 things to ask:
> 1) If you have pointers on how to setup ssh/net connection on QEMU
> with busybox, do let me know.
> 2) Let, please point me to a pre-built qemu-arm busy box image with
> full features.
>
>
> Thanks,
> Pintu