[Pkg-xen-devel] DomU freeze with linux-image-4.9.0-8-amd64 and gnttab_max_frames=256

Hervé Moris herve.moris at loyaltek.com
Thu Apr 4 10:16:20 BST 2019


Subject: xen-hypervisor-4.11-amd64: DomU freeze with
linux-image-4.9.0-8-amd64 and gnttab_max_frames=256
Package: xen-hypervisor-4.11-amd64
Version: 4.11.1-1
Justification: breaks the whole system
Severity: critical
Tags: upstream
 
Dear Maintainers,
 
The issue I have looks a lot to the bug reported here :
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=880554
except that putting gnttab_max_frames=256 didn't solved my issue and the
environement may be a bit different.
 
So here is the situation,
 
I've downloaded Xen sources from the repo, compiled them with XSM/Flask
support, made deb packages and installed them on a fresh install of
Debian 9.
 
Dom0 4-6 vcpu with 4G ram
 
Dom0 and DomU uname -a :
Linux 4.9.0-8-amd64 #1 SMP Debian 4.9.144-3.1 (2019-02-19) x86_64 GNU/Linux
 
DomUs are launched with PvGrub and
seclabel='system_u:system_r:isolated_domU_t'
 
The problematic DomU is connected to a LUN target (iscsi) for some
storage and run some docker containers. (just in case ...)
 
I thought it might be related to the iscsi drive so I completely
uninstalled it but the problem is still occuring.
 
DomU.conf : 
    
    kernel      = '/usr/lib/grub-xen/grub-x86_64-xen.bin'
    extra       = '(hd0)/boot/grub/grub.cfg'
    
    seclabel='system_u:system_r:isolated_domU_t'
    
    vcpus       = '4'
    memory      = '4048'
    
    root        = '/dev/xvda2 ro'
    disk        = [
                      'phy:/dev/vg/domu-root,xvda2,w',
                      'phy:/dev/vg/domu-var-lib-docker,xvda10,w',
                      'phy:/dev/vg/domu-var-log-audit,xvda9,w',
                      'phy:/dev/vg/domu-var-log,xvda8,w',
                      'phy:/dev/vg/domu-home,xvda7,w',
                      'phy:/dev/vg/domu-var,xvda6,w',
                      'phy:/dev/vg/domu-usr,xvda5,w',
                      'phy:/dev/vg/domu-tmp,xvda4,w',
                      'phy:/dev/vg/domu-srv,xvda3,w',
                      'phy:/dev/vg/domu-swap,xvda1,w',
                      'phy:/dev/vg/domu-storage,xvda11,w',
                  ]
    
    name        = 'domu'
    
    vif         = [ 'mac=xx:xx:xx:xx:xx:xx, bridge=xenbr0' ]
    
    on_poweroff = 'destroy'
    on_reboot   = 'restart'
    on_crash    = 'restart'
 
 
 
 
After some "heavy" IO loads, the DomU freeze and the console show
messages like following : 
 
 
[  484.316142] INFO: task kworker/u8:1:48 blocked for more than 120
seconds.
[  484.316183]       Not tainted 4.9.0-8-amd64 #1 Debian 4.9.144-3.1
[  484.316208] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs"
disables this message.
[  484.316240] kworker/u8:1    D    0    48      2 0x00000080
[  484.316276] Workqueue: writeback wb_workfn (flush-202:4)
[  484.316313]  ffff8800e8252540 0000000000000000 ffff8800f2c822c0
ffff8800f7f98980
[  484.316330]  ffff8800f6c06380 ffffc900408d35d0 ffffffff816144b9
0000000000000001
[  484.316347]  00ff8800ebbf60c0 ffff8800f7f98980 ffffffff813135d9
ffff8800f2c822c0
[  484.316367] Call Trace:
[  484.316378]  [<ffffffff816144b9>] ? __schedule+0x239/0x6f0
[  484.316389]  [<ffffffff813135d9>] ? blk_mq_flush_plug_list+0x139/0x160
[  484.316401]  [<ffffffff816149a2>] ? schedule+0x32/0x80
[  484.316410]  [<ffffffff81617d4d>] ? schedule_timeout+0x1dd/0x380
[  484.316421]  [<ffffffff813086b3>] ? blk_flush_plug_list+0xc3/0x230
[  484.316433]  [<ffffffff811861b9>] ? mempool_alloc+0x69/0x190
[  484.316444]  [<ffffffff8101bf91>] ? xen_clocksource_get_cycles+0x11/0x20
[  484.316455]  [<ffffffff8161421d>] ? io_schedule_timeout+0x9d/0x100
[  484.316467]  [<ffffffff81363964>] ? __sbitmap_queue_get+0x24/0x90
[  484.316477]  [<ffffffff81313b80>] ? bt_get.isra.6+0x160/0x220
[  484.316489]  [<ffffffff810bd350>] ? prepare_to_wait_event+0xf0/0xf0
[  484.316500]  [<ffffffff81313ef3>] ? blk_mq_get_tag+0x23/0x90
[  484.316510]  [<ffffffff8130f77a>] ? __blk_mq_alloc_request+0x1a/0x220
[  484.316520]  [<ffffffff81310649>] ? blk_mq_map_request+0xd9/0x170
[  484.316531]  [<ffffffff81312e8b>] ? blk_mq_make_request+0xbb/0x580
[  484.316541]  [<ffffffff81306d35>] ? generic_make_request+0x115/0x2d0
[  484.316551]  [<ffffffff81306f66>] ? submit_bio+0x76/0x140
[  484.316573]  [<ffffffffc01be358>] ? ext4_io_submit+0x48/0x60 [ext4]
[  484.316593]  [<ffffffffc01be5c6>] ? ext4_bio_write_page+0x236/0x4d0
[ext4]
[  484.316605]  [<ffffffff81190f98>] ? clear_page_dirty_for_io+0x148/0x1b0
[  484.316621]  [<ffffffffc01b3a32>] ? mpage_submit_page+0x52/0x70 [ext4]
[  484.316636]  [<ffffffffc01b3c83>] ?
mpage_map_and_submit_buffers+0x133/0x230 [ext4]
[  484.316658]  [<ffffffffc01b8fb0>] ? ext4_writepages+0x7c0/0xd60 [ext4]
[  484.316669]  [<ffffffff81618df4>] ?
_raw_spin_unlock_irqrestore+0x14/0x20
[  484.316680]  [<ffffffff810e9c57>] ? mod_timer+0x177/0x3b0
[  484.316690]  [<ffffffff8123a7bd>] ? __writeback_single_inode+0x3d/0x320
[  484.316700]  [<ffffffff8123af61>] ? writeback_sb_inodes+0x221/0x4f0
[  484.316714]  [<ffffffff8123b2b7>] ? __writeback_inodes_wb+0x87/0xb0
[  484.316724]  [<ffffffff8123b62e>] ? wb_writeback+0x27e/0x310
[  484.316734]  [<ffffffff8123be5e>] ? wb_workfn+0x17e/0x380
[  484.316745]  [<ffffffff8109427a>] ? process_one_work+0x18a/0x430
[  484.316755]  [<ffffffff8109456d>] ? worker_thread+0x4d/0x490
[  484.316765]  [<ffffffff81094520>] ? process_one_work+0x430/0x430
[  484.316775]  [<ffffffff8109a5d9>] ? kthread+0xd9/0xf0
[  484.316786]  [<ffffffff8109a500>] ? kthread_park+0x60/0x60
[  484.316796]  [<ffffffff816193f7>] ? ret_from_fork+0x57/0x70
[  484.316808] INFO: task jbd2/xvda5-8:194 blocked for more than 120
seconds.
[  484.316819]       Not tainted 4.9.0-8-amd64 #1 Debian 4.9.144-3.1
[  484.316828] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs"
disables this message.
[  484.316841] jbd2/xvda5-8    D    0   194      2 0x00000080
[  484.316851]  ffff8800f2dac500 0000000000000000 ffff88000298c380
ffff8800f7e18980
[  484.316867]  ffff8800f2dfa7c0 ffffc9004093bb30 ffffffff816144b9
ffffc9004093bbe8
[  484.316885]  00ffffff81307eaf ffff8800f7e18980 0000000000000000
ffff88000298c380
[  484.316903] Call Trace:
[  484.316910]  [<ffffffff816144b9>] ? __schedule+0x239/0x6f0
[  484.316920]  [<ffffffff81615170>] ? bit_wait+0x50/0x50
[  484.316930]  [<ffffffff816149a2>] ? schedule+0x32/0x80
[  484.316938]  [<ffffffff81617d4d>] ? schedule_timeout+0x1dd/0x380
[  484.316952]  [<ffffffff810f107e>] ? ktime_get+0x3e/0xb0
[  484.316961]  [<ffffffff81615170>] ? bit_wait+0x50/0x50
[  484.316971]  [<ffffffff8161421d>] ? io_schedule_timeout+0x9d/0x100
[  484.316980]  [<ffffffff810bcf87>] ? prepare_to_wait+0x57/0x80
[  484.316991]  [<ffffffff81615187>] ? bit_wait_io+0x17/0x60
[  484.317000]  [<ffffffff81614d45>] ? __wait_on_bit+0x55/0x80
[  484.317009]  [<ffffffff81615170>] ? bit_wait+0x50/0x50
[  484.317018]  [<ffffffff81614eae>] ? out_of_line_wait_on_bit+0x7e/0xa0
[  484.317029]  [<ffffffff810bd3f0>] ? wake_atomic_t_function+0x60/0x60
[  484.317043]  [<ffffffffc0076e6e>] ?
jbd2_journal_commit_transaction+0xdde/0x17b0 [jbd2]
[  484.317059]  [<ffffffff81619364>] ? __switch_to_asm+0x34/0x70
[  484.317069]  [<ffffffff81619370>] ? __switch_to_asm+0x40/0x70
[  484.317080]  [<ffffffff810a1998>] ? finish_task_switch+0x78/0x210
[  484.317090]  [<ffffffff81618df4>] ?
_raw_spin_unlock_irqrestore+0x14/0x20
[  484.317102]  [<ffffffffc007bc62>] ? kjournald2+0xc2/0x260 [jbd2]
[  484.317114]  [<ffffffff810bd350>] ? prepare_to_wait_event+0xf0/0xf0
[  484.317125]  [<ffffffffc007bba0>] ? commit_timeout+0x10/0x10 [jbd2]
[  484.317135]  [<ffffffff8109a5d9>] ? kthread+0xd9/0xf0
[  484.317146]  [<ffffffff8109a500>] ? kthread_park+0x60/0x60
[  484.317154]  [<ffffffff816193f7>] ? ret_from_fork+0x57/0x70
[  484.317164] INFO: task jbd2/xvda4-8:328 blocked for more than 120
seconds.
[  484.317176]       Not tainted 4.9.0-8-amd64 #1 Debian 4.9.144-3.1
[  484.317185] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs"
disables this message.
[  484.317196] jbd2/xvda4-8    D    0   328      2 0x00000080
[  484.317205]  ffff8800f5c3b200 0000000000000000 ffff8800f2d56800
ffff8800f7f18980
[  484.317221]  ffff880002cb0480 ffffc900409c7a70 ffffffff816144b9
ffffffff81092a28
[  484.317237]  00ffe8ffffd8b540 ffff8800f7f18980 ffffffff813135d9
ffff8800f2d56800
[  484.317253] Call Trace:
[  484.317260]  [<ffffffff816144b9>] ? __schedule+0x239/0x6f0
[  484.317268]  [<ffffffff81092a28>] ? queue_work_on+0x28/0x40
[  484.317278]  [<ffffffff813135d9>] ? blk_mq_flush_plug_list+0x139/0x160
[  484.317287]  [<ffffffff81615170>] ? bit_wait+0x50/0x50
[  484.317296]  [<ffffffff816149a2>] ? schedule+0x32/0x80
[  484.317304]  [<ffffffff81617d4d>] ? schedule_timeout+0x1dd/0x380
[  484.317315]  [<ffffffff8101bf91>] ? xen_clocksource_get_cycles+0x11/0x20
[  484.317325]  [<ffffffff81615170>] ? bit_wait+0x50/0x50
[  484.317334]  [<ffffffff8161421d>] ? io_schedule_timeout+0x9d/0x100
[  484.317343]  [<ffffffff810bcf87>] ? prepare_to_wait+0x57/0x80
[  484.317353]  [<ffffffff81615187>] ? bit_wait_io+0x17/0x60
[  484.317362]  [<ffffffff81614d45>] ? __wait_on_bit+0x55/0x80
[  484.317373]  [<ffffffff811828c8>] ? find_get_pages_tag+0x158/0x2e0
[  484.317383]  [<ffffffff81181b2f>] ? wait_on_page_bit+0x7f/0xa0
[  484.317393]  [<ffffffff810bd3f0>] ? wake_atomic_t_function+0x60/0x60
[  484.317403]  [<ffffffff81181c30>] ? __filemap_fdatawait_range+0xe0/0x140
[  484.317413]  [<ffffffff81181c9f>] ? filemap_fdatawait_range+0xf/0x30
[  484.317425]  [<ffffffffc00767cd>] ?
jbd2_journal_commit_transaction+0x73d/0x17b0 [jbd2]
[  484.317437]  [<ffffffff81619364>] ? __switch_to_asm+0x34/0x70
[  484.317447]  [<ffffffff81619370>] ? __switch_to_asm+0x40/0x70
[  484.317456]  [<ffffffff810158e2>] ? xen_load_sp0+0x82/0x170
[  484.317465]  [<ffffffff810a1998>] ? finish_task_switch+0x78/0x210
[  484.317475]  [<ffffffff81618df4>] ?
_raw_spin_unlock_irqrestore+0x14/0x20
[  484.317486]  [<ffffffffc007bc62>] ? kjournald2+0xc2/0x260 [jbd2]
[  484.317496]  [<ffffffff810bd350>] ? prepare_to_wait_event+0xf0/0xf0
[  484.516588]  [<ffffffffc007bba0>] ? commit_timeout+0x10/0x10 [jbd2]
[  484.516603]  [<ffffffff8109a5d9>] ? kthread+0xd9/0xf0
[  484.516612]  [<ffffffff8109a500>] ? kthread_park+0x60/0x60
[  484.516624]  [<ffffffff816193f7>] ? ret_from_fork+0x57/0x70
[  484.516640] INFO: task jbd2/xvda8-8:367 blocked for more than 120
seconds.
[  484.516656]       Not tainted 4.9.0-8-amd64 #1 Debian 4.9.144-3.1
[  484.516667] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs"
disables this message.
[  484.516684] jbd2/xvda8-8    D    0   367      2 0x00000080
[  484.516704]  ffff8800f5c3b200 0000000000000000 ffff8800f5cac740
ffff8800f7f18980
[  484.516741]  ffff880002cb0480 ffffc90040ae7b30 ffffffff816144b9
ffff8800ee926000
[  484.516776]  00ff8800ee943200 ffff8800f7f18980 ffff88008e403f00
ffff8800f5cac740
[  484.516794] Call Trace:
[  484.516802]  [<ffffffff816144b9>] ? __schedule+0x239/0x6f0
[  484.516811]  [<ffffffff81615170>] ? bit_wait+0x50/0x50
[  484.516823]  [<ffffffff816149a2>] ? schedule+0x32/0x80
[  484.516831]  [<ffffffff81617d4d>] ? schedule_timeout+0x1dd/0x380
[  484.516841]  [<ffffffff81619370>] ? __switch_to_asm+0x40/0x70
[  484.516850]  [<ffffffff81619364>] ? __switch_to_asm+0x34/0x70
[  484.516861]  [<ffffffff8101bf91>] ? xen_clocksource_get_cycles+0x11/0x20
[  484.516871]  [<ffffffff810f107e>] ? ktime_get+0x3e/0xb0
[  484.516880]  [<ffffffff81615170>] ? bit_wait+0x50/0x50
[  484.516889]  [<ffffffff8161421d>] ? io_schedule_timeout+0x9d/0x100
[  484.516899]  [<ffffffff810bcf87>] ? prepare_to_wait+0x57/0x80
[  484.516910]  [<ffffffff81615187>] ? bit_wait_io+0x17/0x60
[  484.516921]  [<ffffffff81614d45>] ? __wait_on_bit+0x55/0x80
[  484.516930]  [<ffffffff810a1998>] ? finish_task_switch+0x78/0x210
[  484.516940]  [<ffffffff81615170>] ? bit_wait+0x50/0x50
[  484.516950]  [<ffffffff81614eae>] ? out_of_line_wait_on_bit+0x7e/0xa0
[  484.516961]  [<ffffffff810bd3f0>] ? wake_atomic_t_function+0x60/0x60
[  484.516972]  [<ffffffffc0076fe5>] ?
jbd2_journal_commit_transaction+0xf55/0x17b0 [jbd2]
[  484.516985]  [<ffffffff81619364>] ? __switch_to_asm+0x34/0x70
[  484.516994]  [<ffffffff81619370>] ? __switch_to_asm+0x40/0x70
[  484.517005]  [<ffffffff810a1998>] ? finish_task_switch+0x78/0x210
[  484.517016]  [<ffffffff81618df4>] ?
_raw_spin_unlock_irqrestore+0x14/0x20
[  484.517028]  [<ffffffffc007bc62>] ? kjournald2+0xc2/0x260 [jbd2]
[  484.517038]  [<ffffffff810bd350>] ? prepare_to_wait_event+0xf0/0xf0
[  484.517051]  [<ffffffffc007bba0>] ? commit_timeout+0x10/0x10 [jbd2]
[  484.517062]  [<ffffffff8109a5d9>] ? kthread+0xd9/0xf0
[  484.517071]  [<ffffffff8109a500>] ? kthread_park+0x60/0x60
[  484.517079]  [<ffffffff816193f7>] ? ret_from_fork+0x57/0x70
[  605.148081] INFO: task kworker/u8:1:48 blocked for more than 120
seconds.
[  605.148121]       Not tainted 4.9.0-8-amd64 #1 Debian 4.9.144-3.1
[  605.148146] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs"
disables this message.
[  605.148178] kworker/u8:1    D    0    48      2 0x00000080
[  605.148214] Workqueue: writeback wb_workfn (flush-202:4)
[  605.148242]  ffff8800e8252540 0000000000000000 ffff8800f2c822c0
ffff8800f7f98980
[  605.148287]  ffff8800f6c06380 ffffc900408d35d0 ffffffff816144b9
0000000000000001
[  605.148336]  00ff8800ebbf60c0 ffff8800f7f98980 ffffffff813135d9
ffff8800f2c822c0
[  605.148381] Call Trace:
[  605.148410]  [<ffffffff816144b9>] ? __schedule+0x239/0x6f0
[  605.148438]  [<ffffffff813135d9>] ? blk_mq_flush_plug_list+0x139/0x160
[  605.148476]  [<ffffffff816149a2>] ? schedule+0x32/0x80
[  605.148493]  [<ffffffff81617d4d>] ? schedule_timeout+0x1dd/0x380
[  605.148510]  [<ffffffff813086b3>] ? blk_flush_plug_list+0xc3/0x230
[  605.148527]  [<ffffffff811861b9>] ? mempool_alloc+0x69/0x190
[  605.148541]  [<ffffffff8101bf91>] ? xen_clocksource_get_cycles+0x11/0x20
[  605.148555]  [<ffffffff8161421d>] ? io_schedule_timeout+0x9d/0x100
[  605.148571]  [<ffffffff81363964>] ? __sbitmap_queue_get+0x24/0x90
[  605.148586]  [<ffffffff81313b80>] ? bt_get.isra.6+0x160/0x220
[  605.148602]  [<ffffffff810bd350>] ? prepare_to_wait_event+0xf0/0xf0
[  605.148618]  [<ffffffff81313ef3>] ? blk_mq_get_tag+0x23/0x90
[  605.148629]  [<ffffffff8130f77a>] ? __blk_mq_alloc_request+0x1a/0x220
[  605.148639]  [<ffffffff81310649>] ? blk_mq_map_request+0xd9/0x170
[  605.148649]  [<ffffffff81312e8b>] ? blk_mq_make_request+0xbb/0x580
[  605.148660]  [<ffffffff81306d35>] ? generic_make_request+0x115/0x2d0
[  605.148670]  [<ffffffff81306f66>] ? submit_bio+0x76/0x140
[  605.148694]  [<ffffffffc01be358>] ? ext4_io_submit+0x48/0x60 [ext4]
[  605.148714]  [<ffffffffc01be5c6>] ? ext4_bio_write_page+0x236/0x4d0
[ext4]
[  605.148725]  [<ffffffff81190f98>] ? clear_page_dirty_for_io+0x148/0x1b0
[  605.148742]  [<ffffffffc01b3a32>] ? mpage_submit_page+0x52/0x70 [ext4]
[  605.148757]  [<ffffffffc01b3c83>] ?
mpage_map_and_submit_buffers+0x133/0x230 [ext4]
[  605.148777]  [<ffffffffc01b8fb0>] ? ext4_writepages+0x7c0/0xd60 [ext4]
[  605.148788]  [<ffffffff81618df4>] ?
_raw_spin_unlock_irqrestore+0x14/0x20
[  605.148799]  [<ffffffff810e9c57>] ? mod_timer+0x177/0x3b0
[  605.148809]  [<ffffffff8123a7bd>] ? __writeback_single_inode+0x3d/0x320
[  605.148819]  [<ffffffff8123af61>] ? writeback_sb_inodes+0x221/0x4f0
[  605.148829]  [<ffffffff8123b2b7>] ? __writeback_inodes_wb+0x87/0xb0
[  605.148840]  [<ffffffff8123b62e>] ? wb_writeback+0x27e/0x310
[  605.148850]  [<ffffffff8123be5e>] ? wb_workfn+0x17e/0x380
[  605.148859]  [<ffffffff8109427a>] ? process_one_work+0x18a/0x430
[  605.148871]  [<ffffffff8109456d>] ? worker_thread+0x4d/0x490
[  605.148881]  [<ffffffff81094520>] ? process_one_work+0x430/0x430
[  605.148891]  [<ffffffff8109a5d9>] ? kthread+0xd9/0xf0
[  605.148900]  [<ffffffff8109a500>] ? kthread_park+0x60/0x60
[  605.148909]  [<ffffffff816193f7>] ? ret_from_fork+0x57/0x70
[  605.148920] INFO: task jbd2/xvda5-8:194 blocked for more than 120
seconds.
[  605.148929]       Not tainted 4.9.0-8-amd64 #1 Debian 4.9.144-3.1
[  605.148941] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs"
disables this message.
[  605.148952] jbd2/xvda5-8    D    0   194      2 0x00000080
[  605.148961]  ffff8800f2dac500 0000000000000000 ffff88000298c380
ffff8800f7e18980
[  605.148979]  ffff8800f2dfa7c0 ffffc9004093bb30 ffffffff816144b9
ffffc9004093bbe8
[  605.148995]  00ffffff81307eaf ffff8800f7e18980 0000000000000000
ffff88000298c380
[  605.149011] Call Trace:
[  605.149019]  [<ffffffff816144b9>] ? __schedule+0x239/0x6f0
[  605.149028]  [<ffffffff81615170>] ? bit_wait+0x50/0x50
[  605.149038]  [<ffffffff816149a2>] ? schedule+0x32/0x80
[  605.149046]  [<ffffffff81617d4d>] ? schedule_timeout+0x1dd/0x380
[  605.149057]  [<ffffffff810f107e>] ? ktime_get+0x3e/0xb0
[  605.149066]  [<ffffffff81615170>] ? bit_wait+0x50/0x50
[  605.149075]  [<ffffffff8161421d>] ? io_schedule_timeout+0x9d/0x100
[  605.149085]  [<ffffffff810bcf87>] ? prepare_to_wait+0x57/0x80
[  605.149096]  [<ffffffff81615187>] ? bit_wait_io+0x17/0x60
[  605.149106]  [<ffffffff81614d45>] ? __wait_on_bit+0x55/0x80
[  605.149115]  [<ffffffff81615170>] ? bit_wait+0x50/0x50
[  605.149124]  [<ffffffff81614eae>] ? out_of_line_wait_on_bit+0x7e/0xa0
[  605.149134]  [<ffffffff810bd3f0>] ? wake_atomic_t_function+0x60/0x60
[  605.149150]  [<ffffffffc0076e6e>] ?
jbd2_journal_commit_transaction+0xdde/0x17b0 [jbd2]
[  605.149162]  [<ffffffff81619364>] ? __switch_to_asm+0x34/0x70
[  605.149172]  [<ffffffff81619370>] ? __switch_to_asm+0x40/0x70
[  605.149184]  [<ffffffff810a1998>] ? finish_task_switch+0x78/0x210
[  605.149194]  [<ffffffff81618df4>] ?
_raw_spin_unlock_irqrestore+0x14/0x20
[  605.149206]  [<ffffffffc007bc62>] ? kjournald2+0xc2/0x260 [jbd2]
[  605.149216]  [<ffffffff810bd350>] ? prepare_to_wait_event+0xf0/0xf0
[  605.149227]  [<ffffffffc007bba0>] ? commit_timeout+0x10/0x10 [jbd2]
[  605.149237]  [<ffffffff8109a5d9>] ? kthread+0xd9/0xf0
[  605.149246]  [<ffffffff8109a500>] ? kthread_park+0x60/0x60
[  605.149254]  [<ffffffff816193f7>] ? ret_from_fork+0x57/0x70
[  605.149264] INFO: task jbd2/xvda4-8:328 blocked for more than 120
seconds.
[  605.149273]       Not tainted 4.9.0-8-amd64 #1 Debian 4.9.144-3.1
[  605.149283] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs"
disables this message.
[  605.149294] jbd2/xvda4-8    D    0   328      2 0x00000080
[  605.149303]  ffff8800f5c3b200 0000000000000000 ffff8800f2d56800
ffff8800f7f18980
[  605.149320]  ffff880002cb0480 ffffc900409c7a70 ffffffff816144b9
ffffffff81092a28
[  605.149337]  00ffe8ffffd8b540 ffff8800f7f18980 ffffffff813135d9
ffff8800f2d56800
[  605.149354] Call Trace:
[  605.149361]  [<ffffffff816144b9>] ? __schedule+0x239/0x6f0
[  605.149370]  [<ffffffff81092a28>] ? queue_work_on+0x28/0x40
[  605.149379]  [<ffffffff813135d9>] ? blk_mq_flush_plug_list+0x139/0x160
[  605.149389]  [<ffffffff81615170>] ? bit_wait+0x50/0x50
[  605.149397]  [<ffffffff816149a2>] ? schedule+0x32/0x80
[  605.149406]  [<ffffffff81617d4d>] ? schedule_timeout+0x1dd/0x380
[  605.149416]  [<ffffffff8101bf91>] ? xen_clocksource_get_cycles+0x11/0x20
[  605.149426]  [<ffffffff81615170>] ? bit_wait+0x50/0x50
[  605.149434]  [<ffffffff8161421d>] ? io_schedule_timeout+0x9d/0x100
[  605.149444]  [<ffffffff810bcf87>] ? prepare_to_wait+0x57/0x80
[  605.149454]  [<ffffffff81615187>] ? bit_wait_io+0x17/0x60
[  605.149463]  [<ffffffff81614d45>] ? __wait_on_bit+0x55/0x80
[  605.149473]  [<ffffffff811828c8>] ? find_get_pages_tag+0x158/0x2e0
[  605.149483]  [<ffffffff81181b2f>] ? wait_on_page_bit+0x7f/0xa0
[  605.149493]  [<ffffffff810bd3f0>] ? wake_atomic_t_function+0x60/0x60
[  605.149503]  [<ffffffff81181c30>] ? __filemap_fdatawait_range+0xe0/0x140
[  605.149513]  [<ffffffff81181c9f>] ? filemap_fdatawait_range+0xf/0x30
[  605.149525]  [<ffffffffc00767cd>] ?
jbd2_journal_commit_transaction+0x73d/0x17b0 [jbd2]
[  605.149537]  [<ffffffff81619364>] ? __switch_to_asm+0x34/0x70
[  605.149546]  [<ffffffff81619370>] ? __switch_to_asm+0x40/0x70
[  605.149555]  [<ffffffff810158e2>] ? xen_load_sp0+0x82/0x170
[  605.149565]  [<ffffffff810a1998>] ? finish_task_switch+0x78/0x210
[  605.149574]  [<ffffffff81618df4>] ?
_raw_spin_unlock_irqrestore+0x14/0x20
[  605.149585]  [<ffffffffc007bc62>] ? kjournald2+0xc2/0x260 [jbd2]
[  605.149595]  [<ffffffff810bd350>] ? prepare_to_wait_event+0xf0/0xf0
[  605.149606]  [<ffffffffc007bba0>] ? commit_timeout+0x10/0x10 [jbd2]
[  605.149616]  [<ffffffff8109a5d9>] ? kthread+0xd9/0xf0
[  605.149624]  [<ffffffff8109a500>] ? kthread_park+0x60/0x60
[  605.149633]  [<ffffffff816193f7>] ? ret_from_fork+0x57/0x70
[  605.149642] INFO: task jbd2/xvda8-8:367 blocked for more than 120
seconds.
[  605.348704]       Not tainted 4.9.0-8-amd64 #1 Debian 4.9.144-3.1
[  605.348715] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs"
disables this message.
[  605.348727] jbd2/xvda8-8    D    0   367      2 0x00000080
[  605.348740]  ffff8800f5c3b200 0000000000000000 ffff8800f5cac740
ffff8800f7f18980
[  605.348779]  ffff880002cb0480 ffffc90040ae7b30 ffffffff816144b9
ffff8800ee926000
[  605.348820]  00ff8800ee943200 ffff8800f7f18980 ffff88008e403f00
ffff8800f5cac740
[  605.348854] Call Trace:
[  605.348866]  [<ffffffff816144b9>] ? __schedule+0x239/0x6f0
[  605.348879]  [<ffffffff81615170>] ? bit_wait+0x50/0x50
[  605.348900]  [<ffffffff816149a2>] ? schedule+0x32/0x80
[  605.348915]  [<ffffffff81617d4d>] ? schedule_timeout+0x1dd/0x380
[  605.348929]  [<ffffffff81619370>] ? __switch_to_asm+0x40/0x70
[  605.348939]  [<ffffffff81619364>] ? __switch_to_asm+0x34/0x70
[  605.348950]  [<ffffffff8101bf91>] ? xen_clocksource_get_cycles+0x11/0x20
[  605.348961]  [<ffffffff810f107e>] ? ktime_get+0x3e/0xb0
[  605.348971]  [<ffffffff81615170>] ? bit_wait+0x50/0x50
[  605.348980]  [<ffffffff8161421d>] ? io_schedule_timeout+0x9d/0x100
[  605.348991]  [<ffffffff810bcf87>] ? prepare_to_wait+0x57/0x80
[  605.349002]  [<ffffffff81615187>] ? bit_wait_io+0x17/0x60
[  605.349013]  [<ffffffff81614d45>] ? __wait_on_bit+0x55/0x80
[  605.349023]  [<ffffffff810a1998>] ? finish_task_switch+0x78/0x210
[  605.349037]  [<ffffffff81615170>] ? bit_wait+0x50/0x50
[  605.349046]  [<ffffffff81614eae>] ? out_of_line_wait_on_bit+0x7e/0xa0
[  605.349058]  [<ffffffff810bd3f0>] ? wake_atomic_t_function+0x60/0x60
[  605.349070]  [<ffffffffc0076fe5>] ?
jbd2_journal_commit_transaction+0xf55/0x17b0 [jbd2]
[  605.349083]  [<ffffffff81619364>] ? __switch_to_asm+0x34/0x70
[  605.349093]  [<ffffffff81619370>] ? __switch_to_asm+0x40/0x70
[  605.349104]  [<ffffffff810a1998>] ? finish_task_switch+0x78/0x210
[  605.349115]  [<ffffffff81618df4>] ?
_raw_spin_unlock_irqrestore+0x14/0x20
[  605.349127]  [<ffffffffc007bc62>] ? kjournald2+0xc2/0x260 [jbd2]
[  605.349139]  [<ffffffff810bd350>] ? prepare_to_wait_event+0xf0/0xf0
[  605.349151]  [<ffffffffc007bba0>] ? commit_timeout+0x10/0x10 [jbd2]
[  605.349162]  [<ffffffff8109a5d9>] ? kthread+0xd9/0xf0
[  605.349172]  [<ffffffff8109a500>] ? kthread_park+0x60/0x60
[  605.349181]  [<ffffffff816193f7>] ? ret_from_fork+0x57/0x70
[  725.980078] INFO: task kworker/u8:1:48 blocked for more than 120
seconds.
[  725.980098]       Not tainted 4.9.0-8-amd64 #1 Debian 4.9.144-3.1
[  725.980107] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs"
disables this message.
[  725.980119] kworker/u8:1    D    0    48      2 0x00000080
[  725.980135] Workqueue: writeback wb_workfn (flush-202:4)
[  725.980146]  ffff8800e8252540 0000000000000000 ffff8800f2c822c0
ffff8800f7f98980
[  725.980164]  ffff8800f6c06380 ffffc900408d35d0 ffffffff816144b9
0000000000000001
[  725.980181]  00ff8800ebbf60c0 ffff8800f7f98980 ffffffff813135d9
ffff8800f2c822c0
[  725.980199] Call Trace:
[  725.980210]  [<ffffffff816144b9>] ? __schedule+0x239/0x6f0
[  725.980221]  [<ffffffff813135d9>] ? blk_mq_flush_plug_list+0x139/0x160
[  725.980232]  [<ffffffff816149a2>] ? schedule+0x32/0x80
[  725.980243]  [<ffffffff81617d4d>] ? schedule_timeout+0x1dd/0x380
[  725.980254]  [<ffffffff813086b3>] ? blk_flush_plug_list+0xc3/0x230
[  725.980266]  [<ffffffff811861b9>] ? mempool_alloc+0x69/0x190
[  725.980277]  [<ffffffff8101bf91>] ? xen_clocksource_get_cycles+0x11/0x20
[  725.980290]  [<ffffffff8161421d>] ? io_schedule_timeout+0x9d/0x100
[  725.980300]  [<ffffffff81363964>] ? __sbitmap_queue_get+0x24/0x90
[  725.980312]  [<ffffffff81313b80>] ? bt_get.isra.6+0x160/0x220
[  725.980323]  [<ffffffff810bd350>] ? prepare_to_wait_event+0xf0/0xf0
[  725.980335]  [<ffffffff81313ef3>] ? blk_mq_get_tag+0x23/0x90
[  725.980346]  [<ffffffff8130f77a>] ? __blk_mq_alloc_request+0x1a/0x220
[  725.980359]  [<ffffffff81310649>] ? blk_mq_map_request+0xd9/0x170
[  725.980369]  [<ffffffff81312e8b>] ? blk_mq_make_request+0xbb/0x580
[  725.980382]  [<ffffffff81306d35>] ? generic_make_request+0x115/0x2d0
[  725.980392]  [<ffffffff81306f66>] ? submit_bio+0x76/0x140
[  725.980415]  [<ffffffffc01be358>] ? ext4_io_submit+0x48/0x60 [ext4]
[  725.980435]  [<ffffffffc01be5c6>] ? ext4_bio_write_page+0x236/0x4d0
[ext4]
[  725.980448]  [<ffffffff81190f98>] ? clear_page_dirty_for_io+0x148/0x1b0
[  725.980465]  [<ffffffffc01b3a32>] ? mpage_submit_page+0x52/0x70 [ext4]
[  725.980480]  [<ffffffffc01b3c83>] ?
mpage_map_and_submit_buffers+0x133/0x230 [ext4]
[  725.980502]  [<ffffffffc01b8fb0>] ? ext4_writepages+0x7c0/0xd60 [ext4]
[  725.980513]  [<ffffffff81618df4>] ?
_raw_spin_unlock_irqrestore+0x14/0x20
[  725.980523]  [<ffffffff810e9c57>] ? mod_timer+0x177/0x3b0
[  725.980534]  [<ffffffff8123a7bd>] ? __writeback_single_inode+0x3d/0x320
[  725.980545]  [<ffffffff8123af61>] ? writeback_sb_inodes+0x221/0x4f0
[  725.980556]  [<ffffffff8123b2b7>] ? __writeback_inodes_wb+0x87/0xb0
[  725.980567]  [<ffffffff8123b62e>] ? wb_writeback+0x27e/0x310
[  725.980579]  [<ffffffff8123be5e>] ? wb_workfn+0x17e/0x380
[  725.980588]  [<ffffffff8109427a>] ? process_one_work+0x18a/0x430
[  725.980599]  [<ffffffff8109456d>] ? worker_thread+0x4d/0x490
[  725.980609]  [<ffffffff81094520>] ? process_one_work+0x430/0x430
[  725.980620]  [<ffffffff8109a5d9>] ? kthread+0xd9/0xf0
[  725.980629]  [<ffffffff8109a500>] ? kthread_park+0x60/0x60
[  725.980639]  [<ffffffff816193f7>] ? ret_from_fork+0x57/0x70
[  725.980652] INFO: task jbd2/xvda5-8:194 blocked for more than 120
seconds.
[  725.980663]       Not tainted 4.9.0-8-amd64 #1 Debian 4.9.144-3.1
[  725.980672] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs"
disables this message.
[  725.980684] jbd2/xvda5-8    D    0   194      2 0x00000080
[  725.980693]  ffff8800f2dac500 0000000000000000 ffff88000298c380
ffff8800f7e18980
[  725.980710]  ffff8800f2dfa7c0 ffffc9004093bb30 ffffffff816144b9
ffffc9004093bbe8
[  725.980729]  00ffffff81307eaf ffff8800f7e18980 0000000000000000
ffff88000298c380
[  725.980746] Call Trace:
[  725.980756]  [<ffffffff816144b9>] ? __schedule+0x239/0x6f0
[  725.980765]  [<ffffffff81615170>] ? bit_wait+0x50/0x50
[  725.980774]  [<ffffffff816149a2>] ? schedule+0x32/0x80
[  725.980783]  [<ffffffff81617d4d>] ? schedule_timeout+0x1dd/0x380
[  725.980795]  [<ffffffff810f107e>] ? ktime_get+0x3e/0xb0
[  725.980804]  [<ffffffff81615170>] ? bit_wait+0x50/0x50
[  725.980814]  [<ffffffff8161421d>] ? io_schedule_timeout+0x9d/0x100
[  725.980824]  [<ffffffff810bcf87>] ? prepare_to_wait+0x57/0x80
[  725.980835]  [<ffffffff81615187>] ? bit_wait_io+0x17/0x60
[  725.980844]  [<ffffffff81614d45>] ? __wait_on_bit+0x55/0x80
[  725.980853]  [<ffffffff81615170>] ? bit_wait+0x50/0x50
[  725.980862]  [<ffffffff81614eae>] ? out_of_line_wait_on_bit+0x7e/0xa0
[  725.980872]  [<ffffffff810bd3f0>] ? wake_atomic_t_function+0x60/0x60
[  725.980887]  [<ffffffffc0076e6e>] ?
jbd2_journal_commit_transaction+0xdde/0x17b0 [jbd2]
[  725.980899]  [<ffffffff81619364>] ? __switch_to_asm+0x34/0x70
[  725.980909]  [<ffffffff81619370>] ? __switch_to_asm+0x40/0x70
[  725.980919]  [<ffffffff810a1998>] ? finish_task_switch+0x78/0x210
[  725.980929]  [<ffffffff81618df4>] ?
_raw_spin_unlock_irqrestore+0x14/0x20
[  725.980941]  [<ffffffffc007bc62>] ? kjournald2+0xc2/0x260 [jbd2]
[  725.980951]  [<ffffffff810bd350>] ? prepare_to_wait_event+0xf0/0xf0
[  725.980962]  [<ffffffffc007bba0>] ? commit_timeout+0x10/0x10 [jbd2]
[  725.980973]  [<ffffffff8109a5d9>] ? kthread+0xd9/0xf0
[  725.980981]  [<ffffffff8109a500>] ? kthread_park+0x60/0x60
[  725.980990]  [<ffffffff816193f7>] ? ret_from_fork+0x57/0x70
 
 
 
$ xen-diag gnttab_query_size 0
domid=0: nr_frames=1, max_nr_frames=256
 
$ xen-diag gnttab_query_size 51
xc: error: Could not query dom 20's grant size: Internal error
 
 
$ xl sched-credit 
Cpupool Pool-0: tslice=30ms ratelimit=1000us migration-delay=0us
Name                                ID Weight  Cap
Domain-0                             0    512    0
domu1                               51    256    0
 
 
If you need more information don't hesitate :)
 
Hervé

-- 

*Hervé Moris*
System Administrator / Backend developer

*Loyaltek*
Cantersteen 47
1000 - Brussels
Tel : +32 2 808.07.58
Fax : +32 2 706.56.84

www.loyaltek.com <http://www.loyaltek.com>
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