On Mon, May 20, 2019 at 12:50:30PM +0300, Andrey Ryabinin wrote:
>
>
> On 5/20/19 8:38 AM, kernel test robot wrote:
> > Greeting,
> >
> > FYI, we noticed a -7.6% regression of netperf.Throughput_total_tps due to
> > commit:
> >
> >
> > commit: f0996bc2978e02d2ea898101462b960f6119b18f ("ubsan: Fix nasty
> > -Wbuiltin-declaration-mismatch GCC-9 warnings")
> > https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git master
> >
>
> This can't be right. First of all the commit makes changes only lib/ubsan.c
> which is compiled only when CONFIG_UBSAN=y.
> In your config:
> # CONFIG_UBSAN is not set
>
> But even in the case of enabled UBSAN that commit doesn't change the
> generated machine code at all.
Hi,
Sorry for bringing you inconvenience. We retested the commit and
couldn't reproduce the regression, please ignore the invalid report.
Best Regards,
Rong Chen
