Re: 3.17.0-rc6 system freeze

2014-09-29 Thread Liu Bo
Hi Tomasz, On Mon, Sep 29, 2014 at 02:00:18PM +0200, Tomasz Chmielewski wrote: System froze under 3.17.0-rc6 with btrfs. It had to be hard rebooted. Sep 29 05:50:21 bkp010 kernel: [559018.459704] NMI watchdog: BUG: soft lockup - CPU#6 stuck for 22s! [kworker/u16:24:16872] Sep 29 05:50:21

Re: 3.17.0-rc6 system freeze

2014-09-29 Thread Tomasz Chmielewski
On 2014-09-29 16:10 (Mon), Liu Bo wrote: Hi Tomasz, On Mon, Sep 29, 2014 at 02:00:18PM +0200, Tomasz Chmielewski wrote: System froze under 3.17.0-rc6 with btrfs. It had to be hard rebooted. How does this happen? A stressful write with compression? Rsync (with --inplace - can be stressful