Hello ,
I've tested 4.9-rcX and Linus git tree and have on this box the following messages : ..... Nov 05 20:26:40 zwerg kernel: INFO: rcu_preempt detected stalls on CPUs/tasks: Nov 05 20:26:40 zwerg kernel: Tasks blocked on level-0 rcu_node (CPUs 0-15): P0 Nov 05 20:26:40 zwerg kernel: (detected by 8, t=60002 jiffies, g=2426, c=2425, q=789) Nov 05 20:26:40 zwerg kernel: swapper/0 R running task 0 0 0 0x00200000 Nov 05 20:26:40 zwerg kernel: 0000000000000000 ffff88043fc0c6c0 ffffffff810ca25e 0000000000000004 Nov 05 20:26:40 zwerg kernel: 0000000000000002 0000000000000003 0000000000000010 ffffffff814b936f Nov 05 20:26:40 zwerg kernel: ffff88043fc1d600 ffffffff81893f00 0000000000000003 ffffffff81893de0 Nov 05 20:26:40 zwerg kernel: Call Trace: Nov 05 20:26:40 zwerg kernel: [<ffffffff810ca25e>] ? __tick_broadcast_oneshot_control+0x5e/0x220 Nov 05 20:26:40 zwerg kernel: [<ffffffff814b936f>] ? intel_idle+0xef/0xfe Nov 05 20:26:40 zwerg kernel: [<ffffffff813d3b45>] ? cpuidle_enter_state+0x125/0x200 Nov 05 20:26:40 zwerg kernel: [<ffffffff81096e0f>] ? cpu_startup_entry+0x13f/0x230 Nov 05 20:26:40 zwerg kernel: [<ffffffff818e9e69>] ? start_kernel+0x428/0x430 Nov 05 20:26:40 zwerg kernel: [<ffffffff818e9120>] ? early_idt_handler_array+0x120/0x120 Nov 05 20:26:40 zwerg kernel: [<ffffffff818e937a>] ? x86_64_start_kernel+0xef/0xfe Nov 05 20:26:40 zwerg kernel: swapper/0 R running task 0 0 0 0x00200000 Nov 05 20:26:40 zwerg kernel: 0000000000000000 ffff88043fc0c6c0 ffffffff810ca25e 0000000000000004 Nov 05 20:26:40 zwerg kernel: 0000000000000002 0000000000000003 0000000000000010 ffffffff814b936f Nov 05 20:26:40 zwerg kernel: ffff88043fc1d600 ffffffff81893f00 0000000000000003 ffffffff81893de0 Nov 05 20:26:40 zwerg kernel: Call Trace: Nov 05 20:26:40 zwerg kernel: [<ffffffff810ca25e>] ? __tick_broadcast_oneshot_control+0x5e/0x220 Nov 05 20:26:40 zwerg kernel: [<ffffffff814b936f>] ? intel_idle+0xef/0xfe Nov 05 20:26:40 zwerg kernel: [<ffffffff813d3b45>] ? cpuidle_enter_state+0x125/0x200 Nov 05 20:26:40 zwerg kernel: [<ffffffff81096e0f>] ? cpu_startup_entry+0x13f/0x230 Nov 05 20:26:40 zwerg kernel: [<ffffffff818e9e69>] ? start_kernel+0x428/0x430 Nov 05 20:26:40 zwerg kernel: [<ffffffff818e9120>] ? early_idt_handler_array+0x120/0x120 Nov 05 20:26:40 zwerg kernel: [<ffffffff818e937a>] ? x86_64_start_kernel+0xef/0xfe ..... When I boot to console mode the system seems to work at least when I'm loggen in from tty1. Switching to other tty's sometimes works sometimes not.. Starting X makes the box hang.. sddm starts but I never get to the logn screen. After some minutes I have to hard reset the box.. Latest tested git kernel is 4.9.0-rc3-00429-g03daa36 , the box is a FUJITSU PRIMERGY TX200 S5. config used and dmesg can be found there : http://ftp.frugalware.org/pub/other/people/crazy/kernel/ Best Regards Gabriel C
