Re: Hardware Error Kernel Mini-Summit

From: Mauro Carvalho Chehab
Date: Wed May 19 2010 - 07:55:33 EST

Ingo Molnar wrote:
> Regarding dmesg, there's a WIP patch on lkml that
> integrates printks into this framework as well - makes
> each printk also available as a special string event.
> That way a tool can have both programmatic access to
> printk output (without having to interact with the syslog
> buffer itself) - together with all the other structured
> log sources, while humans can also see what is happening.

Some system admins prefer to have everything on dmesg, as they
can enable a serial console, and catch the logs remotely, even
when the machine crashes for example due to a hardware failure.

So, IMHO, one feature that the perf event needs is the capability
to report errors via a serial console also, or a mechanism where
some events are sent via dmesg.


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