Hard lockup on Raspberry Pi 4 after v5.10-rc1
Nicolas Saenz Julienne
nsaenzjulienne at suse.de
Mon Nov 2 05:15:41 EST 2020
On Mon, 2020-11-02 at 00:29 -0700, Nathan Chancellor wrote:
> Hi everyone,
> Starting with v5.10-rc1, I appear to be experiencing hard lockups on my
> Raspberry Pi 4 when compiling LLVM. My standard workflow for testing the
> Raspberry Pi 4 has been compiling tip of tree LLVM (to catch host
> AArch64 issues), compiling linux-next ARCH=arm64 defconfig, then booting
> it with QEMU + KVM, which has caught a few issues so far. Starting with
> v5.10-rc1, compiling LLVM causes the serial console to print junk like
> then I lose my mosh connection and I see the lights on the front of the
> Pi stop blinking.
> I have managed to narrow it down to a commit somewhere in the armsoc DT
> Good: 2e368dd2bbea ("Merge tag 'armsoc-drivers' of
> Bad: e533cda12d8f ("Merge tag 'armsoc-dt' of
> I have not been able to complete a full bisect due to a lack of time
> unfortunately, I am sending this email to hopefully get some more eyes
> on the issue.
> $ head -n6 /boot/config.txt
> # My settings
> $ cat /boot/.firmware_revision
> I can reproduce the issue with:
> $ git clone --depth=1 https://github.com/llvm/llvm-project
> $ mkdir -p llvm-project/build && cd llvm-project/build
> $ cmake \
> -G Ninja \
> -DCMAKE_BUILD_TYPE=Release \
> -DLLVM_ENABLE_PROJECTS="clang;lld" \
> ../llvm &&
> If you need any more information or testing, please let me know!
Thanks for the report! I'll have a look at it tomorrow.
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