From: Juergen Gross <jgross@suse.com>
To: "xen-devel@lists.xensource.com" <xen-devel@lists.xensource.com>
Subject: WARNings in guest during xl save/restore
Date: Fri, 21 Nov 2014 11:08:37 +0100 [thread overview]
Message-ID: <546F0F25.4040707@suse.com> (raw)
Hi,
during tests of my "linear p2m list" patches I stumbled over some
WARNs issued during xl save and xl restore of a pv-domU with
unpatched linux 3.18-rc5:
during save I saw multiple entries like:
[ 176.900393] WARNING: CPU: 0 PID: 9 at arch/x86/xen/enlighten.c:968
clear_local_APIC+0xa5/0x2b0()
[ 176.900393] Modules linked in: cfg80211 rfkill nfsd auth_rpcgss
oid_registry nfs_acl nfs lockd grace fscache sunrpc evdev
x86_pkg_temp_thermal thermal_sys snd_pcm coretemp snd_timer crc32_pclmul
aesni_intel snd xts soundcore aes_i586 lrw gf128mul ablk_helper pcspkr
cryptd fuse autofs4 ext4 crc16 mbcache jbd2 crc32c_intel
[ 176.900393] CPU: 0 PID: 9 Comm: migration/0 Tainted: G W
3.18.0-rc5 #30
[ 176.900393] 00000009 c14c40b2 00000000 c1054b10 c1599538 00000000
00000009 c158bdc2
[ 176.900393] 000003c8 c103c925 c103c925 000003c8 00000002 00000000
c15d25eb e8867e64
[ 176.900393] c1054bd9 00000009 00000000 c103c925 00000000 c103cb54
00000002 00000000
[ 176.900393] Call Trace:
[ 176.900393] [<c14c40b2>] ? dump_stack+0x3e/0x4e
[ 176.900393] [<c1054b10>] ? warn_slowpath_common+0x90/0xc0
[ 176.900393] [<c103c925>] ? clear_local_APIC+0xa5/0x2b0
[ 176.900393] [<c103c925>] ? clear_local_APIC+0xa5/0x2b0
[ 176.900393] [<c1054bd9>] ? warn_slowpath_null+0x19/0x20
[ 176.900393] [<c103c925>] ? clear_local_APIC+0xa5/0x2b0
[ 176.900393] [<c103cb54>] ? disable_local_APIC+0x24/0x90
[ 176.900393] [<c103ccde>] ? lapic_suspend+0x11e/0x170
[ 176.900393] [<c1360ff9>] ? syscore_suspend+0x79/0x220
[ 176.900393] [<c107e782>] ? set_next_entity+0x62/0x80
[ 176.900393] [<c13165cd>] ? xen_suspend+0x2d/0x110
[ 176.900393] [<c10045df>] ? xen_mc_flush+0x13f/0x170
[ 176.900393] [<c10d5619>] ? multi_cpu_stop+0xa9/0xd0
[ 176.900393] [<c10d5570>] ? cpu_stop_should_run+0x50/0x50
[ 176.900393] [<c10d5771>] ? cpu_stopper_thread+0x71/0x100
[ 176.900393] [<c1074214>] ? finish_task_switch+0x34/0xd0
[ 176.900393] [<c14c513d>] ? __schedule+0x23d/0x7f0
[ 176.900393] [<c10897f4>] ? __wake_up_common+0x44/0x70
[ 176.900393] [<c14c8962>] ? _raw_spin_lock_irqsave+0x12/0x60
[ 176.900393] [<c1071f22>] ? smpboot_thread_fn+0xd2/0x170
[ 176.900393] [<c1071e50>] ? SyS_setgroups+0x110/0x110
[ 176.900393] [<c106e801>] ? kthread+0xa1/0xc0
[ 176.900393] [<c14c8ea1>] ? ret_from_kernel_thread+0x21/0x30
[ 176.900393] [<c106e760>] ? kthread_create_on_node+0x120/0x120
[ 176.900393] ---[ end trace b38596d5cfdcde8d ]---
and during restore:
[ 176.900393] WARNING: CPU: 0 PID: 9 at arch/x86/xen/enlighten.c:968
lapic_resume+0xc6/0x270()
[ 176.900393] Modules linked in: cfg80211 rfkill nfsd auth_rpcgss
oid_registry nfs_acl nfs lockd grace fscache sunrpc evdev
x86_pkg_temp_thermal thermal_sys snd_pcm coretemp snd_timer crc32_pclmul
aesni_intel snd xts soundcore aes_i586 lrw gf128mul ablk_helper pcspkr
cryptd fuse autofs4 ext4 crc16 mbcache jbd2 crc32c_intel
[ 176.900393] CPU: 0 PID: 9 Comm: migration/0 Tainted: G W
3.18.0-rc5 #30
[ 176.900393] 00000009 c14c40b2 00000000 c1054b10 c1599538 00000000
00000009 c158bdc2
[ 176.900393] 000003c8 c103c1e6 c103c1e6 000003c8 c1030020 00000002
0000001b 00000000
[ 176.900393] c1054bd9 00000009 00000000 c103c1e6 00000000 c16432c0
0108cdfe c15d25dc
[ 176.900393] Call Trace:
[ 176.900393] [<c14c40b2>] ? dump_stack+0x3e/0x4e
[ 176.900393] [<c1054b10>] ? warn_slowpath_common+0x90/0xc0
[ 176.900393] [<c103c1e6>] ? lapic_resume+0xc6/0x270
[ 176.900393] [<c103c1e6>] ? lapic_resume+0xc6/0x270
[ 176.900393] [<c1030020>] ? mcheck_cpu_init+0x170/0x4f0
[ 176.900393] [<c1054bd9>] ? warn_slowpath_null+0x19/0x20
[ 176.900393] [<c103c1e6>] ? lapic_resume+0xc6/0x270
[ 176.900393] [<c1360e66>] ? syscore_resume+0x46/0x160
[ 176.900393] [<c1009012>] ? xen_timer_resume+0x42/0x60
[ 176.900393] [<c131661c>] ? xen_suspend+0x7c/0x110
[ 176.900393] [<c10d5619>] ? multi_cpu_stop+0xa9/0xd0
[ 176.900393] [<c10d5570>] ? cpu_stop_should_run+0x50/0x50
[ 176.900393] [<c10d5771>] ? cpu_stopper_thread+0x71/0x100
[ 176.900393] [<c1074214>] ? finish_task_switch+0x34/0xd0
[ 176.900393] [<c14c513d>] ? __schedule+0x23d/0x7f0
[ 176.900393] [<c10897f4>] ? __wake_up_common+0x44/0x70
[ 176.900393] [<c14c8962>] ? _raw_spin_lock_irqsave+0x12/0x60
[ 176.900393] [<c1071f22>] ? smpboot_thread_fn+0xd2/0x170
[ 176.900393] [<c1071e50>] ? SyS_setgroups+0x110/0x110
[ 176.900393] [<c106e801>] ? kthread+0xa1/0xc0
[ 176.900393] [<c14c8ea1>] ? ret_from_kernel_thread+0x21/0x30
[ 176.900393] [<c106e760>] ? kthread_create_on_node+0x120/0x120
[ 176.900393] ---[ end trace b38596d5cfdcde93 ]---
While this seems not to be critical (the system is running after the
restore) I assume disabling/enabling a local APIC on a pv-domain isn't
something we want to happen...
Juergen
next reply other threads:[~2014-11-21 10:08 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-11-21 10:08 Juergen Gross [this message]
2014-11-21 15:14 ` WARNings in guest during xl save/restore Konrad Rzeszutek Wilk
2014-11-21 15:20 ` Boris Ostrovsky
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