Re: [PATCH] watchdog: Inject NMI when locked up and going to panic

2012-11-19 Thread Andrew Morton
On Sat, 17 Nov 2012 19:28:53 -0500 Sasha Levin wrote: > Send an NMI to all CPUs when a lockup is detected and the lockup > watchdog code is configured to panic. This gives us a fairly uptodate > snapshot of all CPUs in the system. > > This lets us get stack trace of all CPUs which makes life eas

[PATCH] watchdog: Inject NMI when locked up and going to panic

2012-11-17 Thread Sasha Levin
Send an NMI to all CPUs when a lockup is detected and the lockup watchdog code is configured to panic. This gives us a fairly uptodate snapshot of all CPUs in the system. This lets us get stack trace of all CPUs which makes life easier trying to debug a deadlock, and the NMI doesn't change anythin