On Mon, Oct 09, 2017 at 08:21:13PM +0800, Fengguang Wu wrote:
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:
<e7840ad76515f0b5061fcdd098b57b7c01b61482.1507215196.git.jpoim...@redhat.com>
From: Josh Poimboeuf <jpoim...@redhat.com>
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
It's easier to reproduce the warning when applying the patches onto v4.14-rc3.
Out of 60 boots there are 33 warnings:
wfg@inn
/pkg/linux/i386-randconfig-i0-201739/gcc-4.8/955f0ec8f62949acd4acf546c0647b1ecf94177a%
grep -h WARNING dmesg-* | sort -k10
[ 118.200019] WARNING: kernel stack frame pointer at be3d3cf1 in
01-cpu-hotplug:12673 has bad value b9000002
[ 82.170015] WARNING: kernel stack frame pointer at be3b9cbd in
01-cpu-hotplug:3060 has bad value b4000002
[ 14.180024] WARNING: kernel stack frame pointer at bf681e49 in
kworker/0:1:15 has bad value 02c09ba5
[ 5.090018] WARNING: kernel stack frame pointer at bf681e2d in
kworker/0:1:15 has bad value b6000002
[ 13.130018] WARNING: kernel stack frame pointer at bf681e2d in
kworker/0:1:15 has bad value b7000002
[ 8.980018] WARNING: kernel stack frame pointer at bf681e2d in
kworker/0:1:15 has bad value b7000002
[ 8.200024] WARNING: kernel stack frame pointer at bf681e2d in
kworker/0:1:15 has bad value ba000002
[ 18.450017] WARNING: kernel stack frame pointer at bc681e2d in
kworker/0:1:15 has bad value bc000002
[ 69.260017] WARNING: kernel stack frame pointer at bdf75c19 in procd:560 has
bad value b4000062
[ 57.520019] WARNING: kernel stack frame pointer at bb01bee5 in
rb_producer:42 has bad value (null)
[ 8.990015] WARNING: kernel stack frame pointer at bdebde1d in
rhashtable_thra:111 has bad value b9000002
[ 17.460024] WARNING: kernel stack frame pointer at bdebbe1d in
rhashtable_thra:111 has bad value ba000002
[ 9.520011] WARNING: kernel stack frame pointer at bdeb7e89 in
rhashtable_thra:113 has bad value b7c0aca7
[ 10.270015] WARNING: kernel stack frame pointer at bdec5e1d in
rhashtable_thra:113 has bad value b9000002
[ 5.230009] WARNING: kernel stack frame pointer at bded1e6d in
rhashtable_thra:116 has bad value b6000002
[ 9.510016] WARNING: kernel stack frame pointer at bb2d3e1d in
rhashtable_thra:117 has bad value bc000002
[ 5.110018] WARNING: kernel stack frame pointer at bded7e1d in
rhashtable_thra:119 has bad value b4000002
[ 17.250023] WARNING: kernel stack frame pointer at baed7ebd in
rhashtable_thra:119 has bad value bb000002
[ 87.380014] WARNING: kernel stack frame pointer at be2bbe6d in seq:2906 has
bad value 01000000
[ 34.460022] WARNING: kernel stack frame pointer at bf60fca1 in swapper/0:1
has bad value 00001225
[ 21.350222] WARNING: kernel stack frame pointer at bf60fc19 in swapper/0:1
has bad value 00bf60fd
[ 22.020027] WARNING: kernel stack frame pointer at bf60fc19 in swapper/0:1
has bad value 00bf60fd
[ 21.950020] WARNING: kernel stack frame pointer at bca0fe81 in swapper/0:1
has bad value 01000000
[ 16.530022] WARNING: kernel stack frame pointer at bf60fe59 in swapper/0:1
has bad value 040e703b
[ 15.490015] WARNING: kernel stack frame pointer at bf60fe59 in swapper/0:1
has bad value 085ecca1
[ 26.350019] WARNING: kernel stack frame pointer at bf60fcbd in swapper/0:1
has bad value 35c11e37
[ 22.980019] WARNING: kernel stack frame pointer at bc60fe59 in swapper/0:1
has bad value 863d8471
[ 25.850018] WARNING: kernel stack frame pointer at bf60fcc9 in swapper/0:1
has bad value 9300aa2a
[ 51.810025] WARNING: kernel stack frame pointer at bf60fca1 in swapper/0:1
has bad value a17ffffe
[ 17.400081] WARNING: kernel stack frame pointer at bf60fcfd in swapper/0:1
has bad value b4000000
[ 0.880020] WARNING: kernel stack frame pointer at bf60fddd in swapper/0:1
has bad value bb000002
[ 12.640008] WARNING: kernel stack frame pointer at bf60fe69 in swapper/0:1
has bad value bdbb4dd0
[ 0.920032] WARNING: kernel stack frame pointer at bf76fe61 in
torture_stutter:37 has bad value b5000000
Thanks,
Fengguang
