On Thu, Nov 30, 2017 at 03:35:54PM +0300, Andrey Ryabinin wrote: > Stackdepot doesn't work well with CONFIG_UNWINDER_GUESS=y. > The 'guess' unwinder generate awfully large and inaccurate stacktraces, > thus stackdepot can't deduplicate stacktraces because they all look like > unique. Eventually stackdepot reaches its capacity limit: > > WARNING: CPU: 0 PID: 545 at lib/stackdepot.c:119 depot_save_stack+0x28e/0x550 > Call Trace: > ? kasan_kmalloc+0x144/0x160 > ? depot_save_stack+0x1f5/0x550 > ? do_raw_spin_unlock+0xda/0xf0 > ? preempt_count_sub+0x13/0xc0 > > <...90 lines...> > > ? do_raw_spin_unlock+0xda/0xf0 > > Add STACKDEPOT=n dependency to UNWINDER_GUESS to avoid the problem. > > Signed-off-by: Andrey Ryabinin <aryabi...@virtuozzo.com> > Reported-by: kernel test robot <xiaolong...@intel.com> > Reported-by: Fengguang Wu <fengguang...@intel.com>
Acked-by: Josh Poimboeuf <jpoim...@redhat.com> -- Josh
