On Thu, Jan 04, 2018 at 02:59:06AM +0100, Thomas Zeitlhofer wrote: > Hello, > > on an Ivybridge CPU, I get with 4.14.11: > > BUG: using smp_processor_id() in preemptible [00000000] code: > ovsdb-server/4510 > caller is native_flush_tlb_single+0x57/0xc0 > CPU: 3 PID: 4510 Comm: ovsdb-server Not tainted > 4.14.11-kvm-00434-gcd0b8eb84f5c #3 > Hardware name: MSI MS-7798/B75MA-P45 (MS-7798), BIOS V1.9 09/30/2013 > Call Trace: > dump_stack+0x5c/0x86 > check_preemption_disabled+0xdd/0xe0 > native_flush_tlb_single+0x57/0xc0 > ? __set_pte_vaddr+0x2d/0x40 > __set_pte_vaddr+0x2d/0x40 > set_pte_vaddr+0x2f/0x40 > cea_set_pte+0x30/0x40 > ds_update_cea.constprop.4+0x4d/0x70 > reserve_ds_buffers+0x159/0x410 > ? wp_page_copy+0x36d/0x6a0 > x86_reserve_hardware+0x150/0x160 > x86_pmu_event_init+0x3e/0x1f0 > perf_try_init_event+0x69/0x80 > perf_event_alloc+0x652/0x740 > SyS_perf_event_open+0x3f6/0xd60 > do_syscall_64+0x5c/0x190 > entry_SYSCALL64_slow_path+0x25/0x25 > RIP: 0033:0x74a1d94580b9 > RSP: 002b:00007fff0c01d5d8 EFLAGS: 00000206 ORIG_RAX: 000000000000012a > RAX: ffffffffffffffda RBX: 00007fff0c01d7b0 RCX: 000074a1d94580b9 > RDX: 00000000ffffffff RSI: 0000000000000000 RDI: 00007fff0c01d5e0 > RBP: 0000000000000000 R08: 0000000000000000 R09: 0000007000000000 > R10: 00000000ffffffff R11: 0000000000000206 R12: 0000000000000008 > R13: 0000000000000000 R14: 00007fff0c01d790 R15: 00005df43a799600 > > This does not show up when booting with pti=off. > > Maybe it is related to the issue that is fixed for the upcoming 4.4.110 > release by https://lkml.org/lkml/2018/1/3/692
JFYI, the very same kernel does not show this issue on a Haswell CPU. Thanks, Thomas
