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

    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



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