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    SubjectRe: [PATCH] proc/stat: Separate out individual irq counts into /proc/stat_irqs
    On Mon, Apr 23, 2018 at 10:54:18PM -0700, David Rientjes wrote:
    > On Sat, 21 Apr 2018, Alexey Dobriyan wrote:
    >
    > > > On Thu, Apr 19, 2018 at 04:23:02PM -0700, Joel Fernandes (Google) wrote:
    > > > > Can we not just remove per-IRQ stats from /proc/stat (since I gather
    > > > > from this discussion it isn't scalable), and just have applications
    > > > > that need per-IRQ stats use /proc/interrupts ?
    > > >
    > > > If you can prove noone is using them in /proc/stat...
    > >
    > > And you can't even stick WARN into /proc/stat to find out.
    > >
    >
    > FWIW, removing per irq counts from /proc/stat would break some of our
    > scripts. We could adapt to that, but everybody else would have to as
    > well, so I'm afraid it's not going to be possible.

    Excellent!

    > It would probably be better to extract out the stats that you're actually
    > interested in to a new file.

    This is the worst scenario. Individual IRQ stats are going to live in 2 places.
    And /proc/stat still would be slow.

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