On Mon, Feb 18, 2019 at 4:53 PM Qian Cai <[email protected]> wrote: > > > > On 2/18/19 10:25 AM, Andrey Konovalov wrote: > > On Sun, Feb 17, 2019 at 5:34 AM Qian Cai <[email protected]> wrote: > >> > >> Enabling function tracer with CONFIG_KASAN_SW_TAGS=y (hwasan) tracer > >> causes the whole system frozen on ThunderX2 systems with 256 CPUs, > >> because there is a burst of too much pointer access, and then KASAN will > >> dereference each byte of the shadow address for the tag checking which > >> will kill all the CPUs. > > > > Hi Qian, > > > > Could you check if adding "CFLAGS_REMOVE_tags.o = -pg" into > > mm/kasan/Makefile helps with that? > > Yes, you nailed it!
Great! I'll send the patch.
