Re: [RFC PATCH] dynamic debug - adding ring buffer storage support
From: Jiri Olsa
Date: Tue Dec 22 2009 - 10:28:56 EST
On Tue, Dec 22, 2009 at 01:06:06PM +0100, Andi Kleen wrote:
> Jiri Olsa <jolsa@xxxxxxxxxx> writes:
>
> > Hi,
> >
> > as I use dynamic debug sometimes, I thought it could be useful having
> > the possibility to store the output somewhere else than dmesg.
> >
> > The attached patch implements support for storing dynamic debug
> > messages to the ring buffer.
> >
> > The dynamic debug allows simple addition of new flags,
> > so I added 'r' flag for ring buffer storage.
> >
> > I used the ring buffer implementation from trace framework.
> >
> > hopefuly this could be any use for others as well...
> > plz let me know what you think,
>
> The basic idea sounds good, but doing it all inline is a horrible
> idea. That will bloat the kernel considerably because all
> users have to expand this code.
>
> I would suggest to implement an out of line dyndebug_printk()
> which does all of this out of line.
right, I'll try to squeeze it
thanks,
jirka
>
> -Andi
> --
> ak@xxxxxxxxxxxxxxx -- Speaking for myself only.
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/