On Fri, Oct 21, 2022 at 09:37:36PM +0000, Pulavarty, Badari wrote: > I have been tracking similar issue(s) with soft lockup or panics on my system consistently with my workload. > Tried multiple kernel versions. Issue seem to happen consistently on 6.1-rc1 (while it seem to happen on 5.17, 5.19, 6.0.X) > > PANIC: "Kernel panic - not syncing: softlockup: hung tasks" > > RIP: 0000000000000001 RSP: ff3d8e7f0d9978ea RFLAGS: ff3d8e7f0d9978e8 > RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 > RDX: 000000006b9c66f1 RSI: ff506ca15ff33c20 RDI: 0000000000000000 > RBP: ffffffff84bc64cc R8: ff3d8e412cabdff0 R9: ffffffff84c00e8b > R10: ff506ca15ff33b69 R11: 0000000000000000 R12: ff506ca15ff33b58 > R13: ffffffff84bc79a3 R14: ff506ca15ff33b38 R15: 0000000000000000 > ORIG_RAX: ff506ca15ff33a80 CS: ff506ca15ff33c78 SS: 0000 > #9 [ff506ca15ff33c18] xas_load at ffffffff84b49a7f > #10 [ff506ca15ff33c28] __filemap_get_folio at ffffffff840985da > #11 [ff506ca15ff33ce8] swap_cache_get_folio at ffffffff841119db Oh, this is interesting. It's the swapper address_space. I bet that 0xffffffff85044560 (the value of a_ops) is the address of swap_ops in your kernel? I don't know if it will help, but it's an interesting data point. > Looking at the crash dump, mapping->host became NULL. Not sure what exactly is happening. That's always true for the swapper_spaces, AIUI. > a_ops = 0xffffffff85044560,
