Messages in this thread | | | Date | Sat, 27 Nov 2010 10:00:58 +0200 | Subject | Re: [thisops uV2 02/10] vmstat: Optimize zone counter modifications through the use of this cpu operations | From | Pekka Enberg <> |
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On Fri, Nov 26, 2010 at 11:09 PM, Christoph Lameter <cl@linux.com> wrote: > this cpu operations can be used to slightly optimize the function. The > changes will avoid some address calculations and replace them with the > use of the percpu segment register. > > If one would have this_cpu_inc_return and this_cpu_dec_return then it > would be possible to optimize inc_zone_page_state and dec_zone_page_state even > more. > > V1->V2: > - Fix __dec_zone_state overflow handling > - Use s8 variables for temporary storage. > > Signed-off-by: Christoph Lameter <cl@linux.com>
Reviewed-by: Pekka Enberg <penberg@kernel.org> -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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