On Wed, 2022-01-05 at 17:40 +0800, Huacai Chen wrote: > Hi, Ruoyao, > > The problem still exists in 5.16-rc8, can you try to change > cpu_relax() definition to smp_mb()? It seems can fix the problem. Is there any workload which can triggers the panic? I can't trigger it by building and testing GCC, or building the kernel anymore. And is your "stable" issue the same one I'd encountered? To me changing barrier() to smp_mb() may fix some deadlock, but not a panic. (I'm not an expert on CPU architecture or kernel programming, so maybe I'm wrong here.) I'll put my 3A5000 machine into a loop building kernel and see if I can trigger the panic again... -- Xi Ruoyao <xry111@xxxxxxxxxxxxxxxx> School of Aerospace Science and Technology, Xidian University
