* Ingo Molnar wrote: > yes - but there's a few pending regressions right now delaying the > reintegration. one of them is a new type of ftrace crash that started triggering in tip/master: [ 3.610253] initcall init_stack_trace+0x0/0x12 returned 0 after 105468 usecs [ 3.616017] calling init_function_trace+0x0/0x12 @ 1 [ 3.620014] Testing tracer function: <1>BUG: unable to handle kernel paging request at ffffffffffffff89 [ 3.648007] IP: [] save_rest+0x9/0x70 [ 3.648007] PGD 203067 PUD 204067 PMD 0 [ 3.648007] Thread overran stack, or stack corrupted [ 3.648007] Oops: 0000 [#1] SMP [ 3.648007] last sysfs file: [ 3.648007] CPU 0 [ 3.648007] Pid: 0, comm: swapper Not tainted 2.6.28-rc7-tip-01358-g7c567b4-dirty #6311 [ 3.648007] RIP: 0010:[] [] save_rest+0x9/0x70 [ 3.648007] RSP: 0018:ffffffff816fde40 EFLAGS: 00010296 [ 3.648007] RAX: 0000000000000000 RBX: ffffffffffffffff RCX: 0000000000000003 [ 3.648007] RDX: 0000000000000000 RSI: ffffffff80218b1c RDI: ffffffff80218acc [ 3.648007] RBP: ffffffff816fde88 R08: ffffffff8025e538 R09: 0000000000000001 [ 3.648007] R10: ffffffff80242084 R11: 0000000000000000 R12: 0000000000000001 [ 3.648007] R13: ffffffff8177f3a0 R14: ffffffff81782390 R15: 0000000000092f70 [ 3.648007] FS: 0000000000000000(0000) GS:ffffffff816f1b00(0000) knlGS:0000000000000000 [ 3.648007] CS: 0010 DS: 0018 ES: 0018 CR0: 000000008005003b [ 3.648007] CR2: ffffffffffffff89 CR3: 0000000000201000 CR4: 00000000000006e0 [ 3.648007] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 3.648007] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 [ 3.648007] Process swapper (pid: 0, threadinfo ffffffff816fc000, task ffffffff8150d4a0) [ 3.648007] Stack: [ 3.648007] ffffffff802112d6 0000000000000000 0000000000000003 0000000000000000 [ 3.648007] ffffffff816fc010 0000000000000003 ffffffff8025e538 0000000000000001 [ 3.648007] ffffffff80218ad1 ffffffff816fde98 ffffffff80218b1c ffffffff816fdec8 [ 3.648007] Call Trace: [ 3.648007] [] ? ftrace_call+0x5/0x2b [ 3.648007] [] ? __atomic_notifier_call_chain+0x0/0x87 [ 3.648007] [] ? constant_test_bit+0x9/0x26 [ 3.648007] [] need_resched+0x23/0x2d [ 3.648007] [] poll_idle+0x33/0x42 [ 3.648007] [] ? atomic_notifier_call_chain+0xf/0x11 [ 3.648007] [] ? stop_critical_timings+0x9/0x21 [ 3.648007] [] cpu_idle+0xac/0xe0 [ 3.648007] [] rest_init+0x66/0x68 [ 3.648007] [] start_kernel+0x47d/0x488 [ 3.648007] [] ? early_idt_handler+0x0/0x73 [ 3.648007] [] x86_64_start_reservations+0xae/0xb2 [ 3.648007] [] x86_64_start_kernel+0x137/0x146 [ 3.648007] Code: 00 00 00 75 0b 58 65 48 8b 24 25 30 00 00 00 50 e8 78 6e c7 00 c3 66 66 66 90 66 66 66 90 66 66 66 90 4c 8b 5c 24 38 48 89 5c 24 <38> 48 89 6c 24 30 4c 89 64 24 28 4c 89 6c 24 20 4c 89 74 24 18 [ 3.648007] RIP [] save_rest+0x9/0x70 [ 3.648007] RSP [ 3.648007] CR2: ffffffffffffff89 [ 3.648007] ---[ end trace 5a5d197966b56a2e ]--- [ 3.648007] Kernel panic - not syncing: Attempted to kill the idle task! [ 3.648007] Pid: 0, comm: swapper Tainted: G D 2.6.28-rc7-tip-01358-g7c567b4-dirty #6311 Full crashlog and config attached. Ingo