On Sat, Jul 17, 2021 at 06:08:04PM -0700, Stephen Hemminger wrote:
> On Sat, 17 Jul 2021 23:13:04 +0100
> Liang Ma <lian...@liangbit.com> wrote:
>
> > On Sat, Jul 17, 2021 at 10:48:49AM -0700, Stephen Hemminger wrote:
> > > On Sat, 17 Jul 2021 18:08:30 +0100
> > > Liang Ma <lian...@liangbit.com> wrote:
> > >
> > > > From: Liang Ma <lian...@bytedance.com>
> > > >
> > > > GCC 6.3.0 has a known bug which related to _mm512_extracti64x4_epi64.
> > > > Please reference https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82887
> > > >
> > > > Some DPDK PMD avx512 version heavily use _mm512_extracti64x4_epi6,
> > > > which casue building failure with debug buildtype.
> > > >
> > > > Therefore, it's helpful to disable avx512 for GCC 6.3.0
> > > >
> > > > Bugzilla ID: 717
> > > > Fixes: e6a6a138919f (net/i40e: add AVX512 vector path)
> > > > Fixes: 808a17b3c1e6 (net/ice: add Rx AVX512 offload path)
> > > > Fixes: 4b64ccb328c9 (net/iavf: fix VLAN extraction in AVX512 path)
> > > > Cc: sta...@dpdk.org
> > > >
> > > > Reported-by: Liang Ma <lian...@liangbit.com>
> > > > Signed-off-by: Liang Ma <lian...@bytedance.com>
> > >
> > > What distro still has GCC 6.3.0?
> > For example Debian 9.x
>
> Ok, thanks. Is there a bug fix in Debian LTS yet?
I look into https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82887, and
find gcc community has no plan to backport fix. Hence, I don't think
Debian LTS will have any fix for this. That's why I send out this patch.