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

[Thomas Monjalon]

2015-11-24 14:44, Stephen Hemminger:
> 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.

I mean it changes the memory allocator behaviour. It's not something we
want to discover a new bug just before the release.
This kind of important change must be integrated at the beginning of the
release cycle.
I'm asking for opinions because it would be really nice to have.