doing that would not fake the old behavior (which is your suggestion),
LOC is per CPU, while the PIT timer irq that was there is global.
But, as per the previous mails, the new behavior is just fine, because
/proc/interrupts just reflects reality. And the way the kernel utilizes
the hardware has just changed - for the better.
The same happens when say a network driver implements NAPI: the IRQ
count goes way, way down. Or if a driver starts supporing MSI - the IRQ
line even moves to another one. Do we try to fix those counts up to
match the 'previous behavior'? Of course not. What you are suggesting
makes no sense, is against current kernel practices - as we pointed it
out to you 7 mails ago.
(that is something else: it's different because a different irq-chip is
behind it.)
Ingo
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