[dpdk-dev] [PATCH 2/2] lib/librte_eal: Remove unnecessary hugepage zero-filling

Stephen Hemminger stephen at networkplumber.org
Tue Nov 24 23:44:03 CET 2015


On Tue, 24 Nov 2015 22:13:28 +0100
Thomas Monjalon <thomas.monjalon at 6wind.com> wrote:

> 2015-11-22 18:28, Stephen Hemminger:
> > On Sun, 22 Nov 2015 14:13:35 -0500
> > Zhihong Wang <zhihong.wang at intel.com> wrote:
> > 
> > > The kernel fills new allocated (huge) pages with zeros.
> > > DPDK just has to populate page tables to trigger the allocation.
> > > 
> > > Signed-off-by: Zhihong Wang <zhihong.wang at intel.com>
> > 
> > Nice, especially on slow machines or with large memory.
> > 
> > Acked-by: Stephen Hemminger <stephen at networkplumber.org>
> 
> Yes very nice.
> I think it's too late to integrate this change which can have some
> unpredictable side effects.
> Do you agree to wait for 2.3?

What side effects? Either it is zero or it is not.
Only some broken architecture would have an issue.


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