Re: [PATCH] trace: skip hwasan

[Qian Cai]

On 2/18/19 10:25 AM, Andrey Konovalov wrote:
> On Sun, Feb 17, 2019 at 5:34 AM Qian Cai <cai@xxxxxx> 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!