Subject: Re: [PATCH] powerpc/vdso: Avoid link stack corruption in __get_datapage()

From: Michael Neuling <[email-masked]>
Date: Thu, 24 Sep 2015 09:33:05 +1000

> I've got the following results on POWER7 64bit
> without the patch:
> # ./tb
> time =3D 0.263337
> # ./tb
> time =3D 0.251273
> # ./tb
> time =3D 0.258453
> # ./tb
> time =3D 0.260189
>=20
> with the patch:
> # ./tb
> time =3D 0.241517
> # ./tb
> time =3D 0.241973
> # ./tb
> time =3D 0.239365
> # ./tb
> time =3D 0.240109

Nice, I was expecting a bump there too but didn't test..  Looks like
about 7% to me. =20

Thanks,
Mikey