vmstat's entries type

[Sten Daniel Sørsdal]

M. Warner Losh wrote:
>
> One approach that we could use for 64-bit counters would be to just
> use 32-bits one, and poll them for overflow and bump an overflow
> count.  This assumes that the 32-bit counters overflow much less often
> than the polling interval, and easily triples the amount of storage
> for each of them...  It is ugly :-(
> 

What's wrong with the add+adc (asm) approach found on any i386?
It would cost you just a few cpu cycles unless i'm mistaken.

-- 
Sten Daniel Sørsdal