Re: Re-implement MCE log ring buffer as per-CPU ring buffer

Steven Rostedt
2009-04-27T14:28:04Z

On Mon, 27 Apr 2009, Huang Ying wrote:

> On Fri, 2009-04-24 at 21:36 +0800, Steven Rostedt wrote:
> > On Fri, 24 Apr 2009, Robert Richter wrote:
> > > >
> > > > It seems that ring_buffer is not NMI-safe, while mcelog buffer will be
> > > > used in NMI context and interrupt context. When will ring_buffer to be
> > > > NMI-safe?
> > >
> > > You can use it in nmi context with separate read and write
> > > buffers. See this patch description:
> > > 6dad828b76c7224a22ddc9ce7aa495d994f03b31
> > >
> > > Not sure if somebody will make the ring_buffer non-locking.
> >
> > It already is ;-)
> >
> > I've put in for a patent application on the algorithm so I must wait till
> > it is processed before I can release the code.
>
> When will it be merged by mainline kernel? Do you have a plan?
>
> We do have some scalability issues of current mcelog implementation, and
> hopes that can be solved as soon as possible, perhaps for 2.6.31?

Yes, I plan on being able to post it before the 31 merge window opens.
I'll ping the lawyer to expedite the process.

-- Steve