On Mon, 19 Jun 2023 at 12:12, Chanho Min <chanho.min@xxxxxxx> wrote: > > This patch removes description of the KASAN_HW_TAGS's memory consumption. > KASAN_HW_TAGS does not set 1/32nd shadow memory. The hardware still allocates/uses shadow in MTE. Though, it may be 1/16-th, not sure. > Signed-off-by: Chanho Min <chanho.min@xxxxxxx> > --- > lib/Kconfig.kasan | 2 -- > 1 file changed, 2 deletions(-) > > diff --git a/lib/Kconfig.kasan b/lib/Kconfig.kasan > index fdca89c05745..5be1740234b9 100644 > --- a/lib/Kconfig.kasan > +++ b/lib/Kconfig.kasan > @@ -124,8 +124,6 @@ config KASAN_HW_TAGS > Supported only on arm64 CPUs starting from ARMv8.5 and relies on > Memory Tagging Extension and Top Byte Ignore. > > - Consumes about 1/32nd of available memory. > - > May potentially introduce problems related to pointer casting and > comparison, as it embeds a tag into the top byte of each pointer. > > -- > 2.17.1 >
