[PATCH] panic.c: export panic_on_oops
akpm at linux-foundation.org
Mon Oct 12 14:09:54 EDT 2009
On Mon, 12 Oct 2009 08:36:38 -0700 (PDT) Linus Torvalds <torvalds at linux-foundation.org> wrote:
> I agree with the "save kernel buffer on panic" thing, but I disagree with
> making it anything new, and hooking into "printk()" or the console
> subsystem AT ALL. That's just bogus, stupid, and WRONG.
> What you can do is to just flush the 'log_buf' buffer (or as much of it as
> you want - the buffer may be a megabyte in size, and maybe you only want
> to flush the last 8kB or something like that) on oops. And _not_ mix this
> up with anything else.
What he said. I did it that way in the Digeo kernel back in 2002.
Doing it via a console is rather weird. It will need core kernel
changes to do it properly.
Perhaps oops_enter() is a good place to mark the start of the log, and
flush it within oops_exit().
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