* Attila Szegedi: >> That seems … quite unlikely. GCC 8 has seen extensive use on >> AArch64, on a variety of implementations, and I don't recall >> problems in this area. I don't follow AArch64 *that* closely, >> admittedly, but I expect it would have caused quite a ruckus. >> > > Yeah. The lack of discussion also led me to believe that even if this is an > issue, it's definitely not a widely encountered one. (It's also possible > that it's a red herring, although, well, as I said, forcing general regs > only did fix it.)
Is it non-deterministic? It might be a context switching issue in the kernel/hypervisor/firmware. I usually don't notice fixes for those because they do not lead to questions whether it's necessary to rebuild the whole distribution. These bugs do happen from time to time: [PATCH v3 0/8] KVM: arm64: FPSIMD/SVE/SME fixes <https://lore.kernel.org/linux-arm-kernel/20250210195226.1215254-1-mark.rutl...@arm.com/>
