Re: HARD LOCKUP: Strange hard lock up on spin_lock(sighand-siglock);

2015-08-03 Thread Steven Rostedt
On Mon, 27 Jul 2015 15:54:01 +0300 Nikolay Borisov ker...@kyup.com wrote: Hello, I have a machine running kernel 3.13.3, in fact I have 3 such machines 3.13.3 is a very old kernel. A lot has changed. Also there's newer stable kernels of that release too (3.13.11). which are connected via

Re: HARD LOCKUP: Strange hard lock up on spin_lock(sighand-siglock);

2015-08-03 Thread Oleg Nesterov
Sorry for delay, vacation. I'll try to re-read your email later, just one note for now... On 07/27, Nikolay Borisov wrote: Based on that I think could be happening is that the sighand itself is being freed while we are in the grace period inside __lock_task_sighand but the slab page itself

HARD LOCKUP: Strange hard lock up on spin_lock(sighand-siglock);

2015-07-27 Thread Nikolay Borisov
Hello, I have a machine running kernel 3.13.3, in fact I have 3 such machines which are connected via corosync in a cluster. On one of the machines I observed the following lock-up: Jul 26 06:01:14 shrek kernel: [ cut here ] Jul 26 06:01:14 shrek kernel: WARNING: CPU: