Re: [MM] Make mm counters per cpu instead of atomic

Andi Kleen
2009-11-04T21:01:03Z

Christoph Lameter <cl@linux-foundation.org> writes:
>
> One price to pay for these improvements is the need to scan over all percpu
> counters when the actual count values are needed.

Do you have numbers how costly alloc_percpu() is? I wonder what this
does to fork() overhead.

-Andi

--
ak@linux.intel.com -- Speaking for myself only.