On Mon, Oct 09, 2017 at 12:50:55PM +0200, Peter Zijlstra wrote: >> Fengguang, if you're still listening, could you please rerun the tests >> on top of ce07a9415f26, with the attached patches also applied? > >Ping!? it would be very good to get feedback on this asap. Sorry for the delay! >> From e7840ad76515f0b5061fcdd098b57b7c01b61482 Mon Sep 17 00:00:00 2001 >> Message-Id: >> From: Josh Poimboeuf >> Date: Thu, 5 Oct 2017 09:43:59 -0500 >> Subject: [PATCH 1/2] unwinder fixes >> >> --- >> arch/x86/kernel/unwind_frame.c | 33 ++++++++++++++++++++++++++++++--- I just test 316 boots and see 7 WARNINGs: [ 404.948035] WARNING: kernel stack frame pointer at c6ea3ecd in init:212 has bad value (null) [ 298.118383] WARNING: kernel stack frame pointer at cde07dad in init:1 has bad value bc000000 [ 112.848677] WARNING: kernel stack frame pointer at cde07dbd in swapper/0:1 has bad value c2000000 [ 127.942417] WARNING: kernel stack frame pointer at cf95de71 in rb_producer:50 has bad value 03cf95de [ 4.736938] WARNING: kernel stack frame pointer at bf643d59 in kworker/0:1:15 has bad value b5000000 [ 308.260066] WARNING: kernel stack frame pointer at bde07da5 in udevd:155 has bad value b5bfa17b [ 277.473596] WARNING: CPU: 0 PID: 520 at kernel/locking/lockdep.c:3841 check_flags+0x119/0x1b0 Attached are 2 dmesgs for the 2 types of warnings. Regards, Fengguang