On Mon, 18 Feb 2019 16:56:44 +0100 Andrey Konovalov <andreyk...@google.com> wrote:
> On Mon, Feb 18, 2019 at 4:53 PM Qian Cai <c...@lca.pw> wrote: > > > > > > > > On 2/18/19 10:25 AM, Andrey Konovalov wrote: > > > On Sun, Feb 17, 2019 at 5:34 AM Qian Cai <c...@lca.pw> 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. OK, then I'll ignore the original patch in this thread. -- Steve
