On 11/21/2014 10:14 AM, Konrad Rzeszutek Wilk wrote:
On Fri, Nov 21, 2014 at 11:08:37AM +0100, Juergen Gross wrote:
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:
Boris had an patch for this I htink..
Right, I submitted a patch a while ago to disable APIC power management
for PV but it didn't get anywhere (needed a response from x86 maintainers)
http://lists.xenproject.org/archives/html/xen-devel/2014-03/msg00153.html
Strangely enough, I don't remember seeing this error since then for some
reason.
-boris
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: GW
3.18.0-rc5 #30
[ 176.900393] 0009 c14c40b2 c1054b10 c1599538
0009 c158bdc2
[ 176.900393] 03c8 c103c925 c103c925 03c8 0002
c15d25eb e8867e64
[ 176.900393] c1054bd9 0009 c103c925 c103cb54
0002
[ 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: GW
3.18.0-rc5 #30
[ 176.900393] 0009 c14c40b2 c1054b10 c1599538
0009 c158bdc2
[ 176.900393] 03c8 c103c1e6 c103c1e6 03c8 c1030020 0002
001b
[ 176.900393] c1054bd9 0009 c103c1e6 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
