[Gluster-devel] Undefined behaviour results in udf instruction on armv7h

[Xavi Hernandez]

Hi Daniel,

some recent additions in the code require 64-bits atomic operations. We use
the userspace-rcu library to implement those atomics, and that library
places an "undefined instruction" when a 64-bits atomic is found when
compiling for 32-bit hardware.

There will be some changes in the existing code that may not require 64-bit
atomics, but I can promise anything right now.

Best regards,

Xavi

On Tue, Apr 12, 2022 at 10:06 AM Daniel Brunner <daniel at brunner.ninja>
wrote:

> Hi,
>
> I was using gluster on lots of odroid-hc2 machines, and with the latest
> gluster update provided by archlinuxarm, the glusterd process dies with an
> "Illegal instruction".
>
> I tried debugging on those machines using gdb, and I suspect a compiler
> update on the build machines of archlinuxarm now detects some undefined
> behaviour and therefore places undefined machine instructions in the binary.
>
> Any ideas?
>
> [image: image.png]
>
> best regards
>
> Daniel
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