Re: v5.17-rc3 compile failure on aarch64

Re: v5.17-rc3 compile failure on aarch64

[Mark Rutland]

On Thu, Feb 17, 2022 at 04:37:49PM +0800, Qu Wenruo wrote:
> Hi,

Hi,

[adding LAKML so other arm/arm64 folk can chime in]

> Recently I found v5.17-rc3 kernel failed to compile on my aarch64 setup,
> it failed with the following error messages:
> 
>   AR      lib/zstd/built-in.a
>   LD [M]  lib/zstd/zstd_compress.o
> ld: __patchable_function_entries has both ordered
> [`__patchable_function_entries' in lib/zstd/common/entropy_common.o] and
> unordered [`__patchable_function_entries' in
> lib/zstd/common/error_private.o] sections
> ld: final link failed: bad value
> make[2]: *** [scripts/Makefile.build:484: lib/zstd/zstd_compress.o] Error 1
> make[1]: *** [scripts/Makefile.build:550: lib/zstd] Error 2
> make: *** [Makefile:1831: lib] Error 2
> make: *** Waiting for unfinished jobs....

Uh-oh; that doesn't look good.

In case this is configuration-dependent, could you share your .config?

> But the same code base compiles fine inside my x86_64 VM.
> 
> The aarch64 environment is an VM running on RockPro64 or RPI CM4.
> 
> With a little older gcc (v10.2.0) and bintuils (2.35).

Is this a custom-built toolchain, or one shipped by a distribution?

If possible, can you see if you can reproduce this with one of the
kernel.org cross toolchains:

  https://mirrors.edge.kernel.org/pub/tools/crosstool/

... because if you can, that will be much easier for someone else to
reproduce and analyse.

The closest builds are 9.3.0 and 10.3.0, for both arm64 and x86_64.

FWIW, I had a go building v5.17-rc3 defconfig with ftrace and zstd bits
eanbled with both GCC 9.3.0 and GCC 10.3.0, and I could not reproduce
the problem.

Thanks,
Mark.

> While for my x86_64 VM it has newer gcc (11.1.0) and binutiles (2.36.1)
> 
> I'm super happy to upgrade my tool chain for my aarch64 VM, but I'm a
> little concerned if there is something worthy fixed.
> 
> Thanks,
> Qu

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Re: v5.17-rc3 compile failure on aarch64

[Qu Wenruo]

[-- Attachment #1: Type: text/plain, Size: 2700 bytes --]



On 2022/2/17 19:50, Mark Rutland wrote:
> On Thu, Feb 17, 2022 at 04:37:49PM +0800, Qu Wenruo wrote:
>> Hi,
>
> Hi,
>
> [adding LAKML so other arm/arm64 folk can chime in]
>
>> Recently I found v5.17-rc3 kernel failed to compile on my aarch64 setup,
>> it failed with the following error messages:
>>
>>    AR      lib/zstd/built-in.a
>>    LD [M]  lib/zstd/zstd_compress.o
>> ld: __patchable_function_entries has both ordered
>> [`__patchable_function_entries' in lib/zstd/common/entropy_common.o] and
>> unordered [`__patchable_function_entries' in
>> lib/zstd/common/error_private.o] sections
>> ld: final link failed: bad value
>> make[2]: *** [scripts/Makefile.build:484: lib/zstd/zstd_compress.o] Error 1
>> make[1]: *** [scripts/Makefile.build:550: lib/zstd] Error 2
>> make: *** [Makefile:1831: lib] Error 2
>> make: *** Waiting for unfinished jobs....
>
> Uh-oh; that doesn't look good.
>
> In case this is configuration-dependent, could you share your .config?

Sure, attached.

>
>> But the same code base compiles fine inside my x86_64 VM.
>>
>> The aarch64 environment is an VM running on RockPro64 or RPI CM4.
>>
>> With a little older gcc (v10.2.0) and bintuils (2.35).
>
> Is this a custom-built toolchain, or one shipped by a distribution?

Shipped by distro (ArchlinuxARM), native, no cross chain.

And it's mostly upstream, or very lightly backported.

>
> If possible, can you see if you can reproduce this with one of the
> kernel.org cross toolchains:
>
>    https://mirrors.edge.kernel.org/pub/tools/crosstool/
>
> ... because if you can, that will be much easier for someone else to
> reproduce and analyse.
>
> The closest builds are 9.3.0 and 10.3.0, for both arm64 and x86_64.

Sorry, not cross tool chain but native toolchain.

>
> FWIW, I had a go building v5.17-rc3 defconfig with ftrace and zstd bits
> eanbled with both GCC 9.3.0 and GCC 10.3.0, and I could not reproduce
> the problem.

After the incident, I tried the following things, and got it solved:

- Upgrade to gcc 11.1.0 and binutils 2.36.1
   The same kernel base, no "make clean"

   And got the same error.

- "make clean" for the kernel and recompile
   Now the failure is gone.

   Thus I guess it's mostly some old .o is being re-used...

Sorry for the inconvenience, I should just re-compile (even it's super
time-consuming) before reporting...

Thanks,
Qu

>
> Thanks,
> Mark.
>
>> While for my x86_64 VM it has newer gcc (11.1.0) and binutiles (2.36.1)
>>
>> I'm super happy to upgrade my tool chain for my aarch64 VM, but I'm a
>> little concerned if there is something worthy fixed.
>>
>> Thanks,
>> Qu

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[-- Attachment #3: Type: text/plain, Size: 176 bytes --]

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Re: v5.17-rc3 compile failure on aarch64

[Mark Rutland]

On Thu, Feb 17, 2022 at 07:59:10PM +0800, Qu Wenruo wrote:
> 
> 
> On 2022/2/17 19:50, Mark Rutland wrote:
> > On Thu, Feb 17, 2022 at 04:37:49PM +0800, Qu Wenruo wrote:
> > > Hi,
> > 
> > Hi,
> > 
> > [adding LAKML so other arm/arm64 folk can chime in]
> > 
> > > Recently I found v5.17-rc3 kernel failed to compile on my aarch64 setup,
> > > it failed with the following error messages:
> > > 
> > >    AR      lib/zstd/built-in.a
> > >    LD [M]  lib/zstd/zstd_compress.o
> > > ld: __patchable_function_entries has both ordered
> > > [`__patchable_function_entries' in lib/zstd/common/entropy_common.o] and
> > > unordered [`__patchable_function_entries' in
> > > lib/zstd/common/error_private.o] sections
> > > ld: final link failed: bad value
> > > make[2]: *** [scripts/Makefile.build:484: lib/zstd/zstd_compress.o] Error 1
> > > make[1]: *** [scripts/Makefile.build:550: lib/zstd] Error 2
> > > make: *** [Makefile:1831: lib] Error 2
> > > make: *** Waiting for unfinished jobs....
> > 
> > Uh-oh; that doesn't look good.
> > 
> > In case this is configuration-dependent, could you share your .config?
> 
> Sure, attached.

Thanks!

> > > But the same code base compiles fine inside my x86_64 VM.
> > > 
> > > The aarch64 environment is an VM running on RockPro64 or RPI CM4.
> > > 
> > > With a little older gcc (v10.2.0) and bintuils (2.35).
> > 
> > Is this a custom-built toolchain, or one shipped by a distribution?
> 
> Shipped by distro (ArchlinuxARM), native, no cross chain.
> 
> And it's mostly upstream, or very lightly backported.
> 
> > If possible, can you see if you can reproduce this with one of the
> > kernel.org cross toolchains:
> > 
> >    https://mirrors.edge.kernel.org/pub/tools/crosstool/
> > 
> > ... because if you can, that will be much easier for someone else to
> > reproduce and analyse.
> > 
> > The closest builds are 9.3.0 and 10.3.0, for both arm64 and x86_64.
> 
> Sorry, not cross tool chain but native toolchain.

I understood that; the page has builds for arm64 hosts. :)

> > FWIW, I had a go building v5.17-rc3 defconfig with ftrace and zstd bits
> > eanbled with both GCC 9.3.0 and GCC 10.3.0, and I could not reproduce
> > the problem.
> 
> After the incident, I tried the following things, and got it solved:
> 
> - Upgrade to gcc 11.1.0 and binutils 2.36.1
>   The same kernel base, no "make clean"
> 
>   And got the same error.
> 
> - "make clean" for the kernel and recompile
>   Now the failure is gone.
> 
>   Thus I guess it's mostly some old .o is being re-used...
> 
> Sorry for the inconvenience, I should just re-compile (even it's super
> time-consuming) before reporting...

No worries; thanks for confirming!

Thanks,
Mark.

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