Messages in this thread | | | Date | Fri, 25 Apr 2014 00:21:20 +0200 (CEST) | From | Jiri Kosina <> | Subject | Re: [PATCH] printk: Print cpu number along with time |
| |
On Thu, 24 Apr 2014, David Rientjes wrote:
> > Well, if you have dmesg dump from panic that happens every other year, and > > you have to do post-mortem analysis on it, I am pretty sure you would love > > to be able to figure out how the stack traces would look like without > > inter-CPU interleaving. And I am pretty sure you wouldn't want to > > insert/enable a tracepoint and wait another two years for the bug to > > trigger again. > > Sounds like the appropriate fix would be to serialize stack dumping to the > kernel log.
That's rather difficult, as it can be done both from NMI and non-NMI contexts, and those are very hard to synchronize.
-- Jiri Kosina SUSE Labs
| |