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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] Regression introduced by "xen: properly account for _PAGE_NUMA during xen pte translations" (a9c8e4beeeb64c22b84c803747487857fe424b68)
For the issue fixed by a9c8e4be, it was possible to trigger it using a
small test case. Does that same test work if you run it after
migrating the instance?
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/mman.h>
void die(const char *what)
{
perror(what);
exit(1);
}
int main(int arg, char **argv)
{
void *p = mmap(NULL, 4096, PROT_READ | PROT_WRITE, MAP_PRIVATE
| MAP_ANONYMOUS, -1, 0);
if (p == MAP_FAILED)
die("mmap");
/* Tickle the page. */
((char *)p)[0] = 0;
if (mprotect(p, 4096, PROT_NONE) != 0)
die("mprotect");
if (mprotect(p, 4096, PROT_READ) != 0)
die("mprotect");
if (munmap(p, 4096) != 0)
die("munmap");
return 0;
}
On Thu, Feb 27, 2014 at 6:25 PM, Konrad Rzeszutek Wilk
<konrad.wilk@xxxxxxxxxx> wrote:
>
> This only shows up when using the Linux kernel as a 64-bit PV guest and
> when I have migrated and I am running iscsid and I poweroff the guest.
> Note: I can also reproduce this if I kill 'iscsid'.
>
> If I revert the above mentioned commit the problem disappears.
>
> The page flags it shows are bogus - this guest is running from RAM
> and has no swap.
>
> Here is what the console says (ignore the first BUG please):
>
> [ 42.268060] xen:grant_table: Grant tables using version 1 layout
> [ 42.268060] BUG: sleeping function called from invalid context at
> /home/konrad/ssd/konrad/linux/kernel/locking/mutex.c:96
> [ 42.268060] in_atomic(): 1, irqs_disabled(): 1, pid: 9, name: migration/0
> [ 42.268060] CPU: 0 PID: 9 Comm: migration/0 Not tainted 3.14.0-rc4upstream
> #1
> [ 42.268060] 0000000000000002 ffff88003cc0dcd8 ffffffff816f0e59
> ffff88003cc02630
> [ 42.268060] ffffffff81c6df80 ffff88003cc0dce8 ffffffff810cdfce
> ffff88003cc0dd08
> [ 42.268060] ffffffff816f3bdf ffff88003cc0dd08 0000000000000017
> ffff88003cc0dd38
> [ 42.268060] Call Trace:
> [ 42.268060] [<ffffffff816f0e59>] dump_stack+0x51/0x6b
> [ 42.268060] [<ffffffff810cdfce>] __might_sleep+0xce/0xf0
> [ 42.268060] [<ffffffff816f3bdf>] mutex_lock+0x1f/0x40
> [ 42.268060] [<ffffffff813f49fb>] rebind_evtchn_irq+0x3b/0xb0
> [ 42.268060] [<ffffffff81428bdc>] xen_console_resume+0x5c/0x60
> [ 42.268060] [<ffffffff813f3c0a>] xen_suspend+0x8a/0xb0
> [ 42.268060] [<ffffffff811265db>] multi_cpu_stop+0xbb/0xe0
> [ 42.268060] [<ffffffff81126520>] ? irq_cpu_stop_queue_work+0x30/0x30
> [ 42.268060] [<ffffffff81126bfa>] cpu_stopper_thread+0x4a/0x180
> [ 42.268060] [<ffffffff816f1a01>] ? __schedule+0x381/0x7e0
> [ 42.268060] [<ffffffff810cbf10>] ? smpboot_create_threads+0x80/0x80
> [ 42.268060] [<ffffffff816f612b>] ? _raw_spin_unlock_irqrestore+0x1b/0x70
> [ 42.268060] [<ffffffff810cc058>] smpboot_thread_fn+0x148/0x1e0
> [ 42.268060] [<ffffffff810cbf10>] ? smpboot_create_threads+0x80/0x80
> [ 42.268060] [<ffffffff810c490e>] kthread+0xce/0xf0
> [ 42.268060] [<ffffffff810c4840>] ? kthread_freezable_should_stop+0x80/0x80
> [ 42.268060] [<ffffffff816fe74c>] ret_from_fork+0x7c/0xb0
> [ 42.268060] [<ffffffff810c4840>] ? kthread_freezable_should_stop+0x80/0x80
> [ 42.268060] PM: noirq restore of devices complete after 0.251 msecs
> [ 42.268645] PM: early restore of devices complete after 0.151 msecs
>
> #
> # [ 42.281199] switch: port 1(eth0) entered disabled state
> [ 42.282591] PM: restore of devices complete after 11.656 msecs
> [ 42.307965] switch: port 1(eth0) entered forwarding state
> [ 42.307990] switch: port 1(eth0) entered forwarding state
>
> #
> #
> # [ 57.312124] switch: port 1(eth0) entered forwarding state
> lspci
> # lsscsi
> # ifconfig
> eth0 Link encap:Ethernet HWaddr 00:0F:4B:00:00:68
> inet6 addr: fe80::20f:4bff:fe00:68/64 Scope:Link
> UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
> RX packets:99 errors:0 dropped:0 overruns:0 frame:0
> TX packets:86 errors:0 dropped:0 overruns:0 carrier:0
> collisions:0 txqueuelen:1000
> RX bytes:8722 (8.5 KiB) TX bytes:8709 (8.5 KiB)
>
> lo Link encap:Local Loopback
> inet addr:127.0.0.1 Mask:255.0.0.0
> inet6 addr: ::1/128 Scope:Host
> UP LOOPBACK RUNNING MTU:65536 Metric:1
> RX packets:4 errors:0 dropped:0 overruns:0 frame:0
> TX packets:4 errors:0 dropped:0 overruns:0 carrier:0
> collisions:0 txqueuelen:0
> RX bytes:260 (260.0 b) TX bytes:260 (260.0 b)
>
> switch Link encap:Ethernet HWaddr 00:0F:4B:00:00:68
> inet addr:192.168.102.68 Bcast:192.168.102.255 Mask:255.255.255.0
> inet6 addr: fe80::20f:4bff:fe00:68/64 Scope:Link
> UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
> RX packets:96 errors:0 dropped:0 overruns:0 frame:0
> TX packets:75 errors:0 dropped:0 overruns:0 carrier:0
> collisions:0 txqueuelen:0
> RX bytes:8506 (8.3 KiB) TX bytes:7755 (7.5 KiB)
>
> # ping 1 8.8.8.8
> PING 8.8.8.8 (8.8.8.8) 56(84) bytes of data.
> 64 bytes from 8.8.8.8: icmp_seq=1 ttl=45 time=57.0 ms
> 64 bytes from 8.8.8.8: icmp_seq=2 ttl=45 time=51.4 ms
> 64 bytes from 8.8.8.8: icmp_seq=3 ttl=45 time=51.8 ms
> ^C
> --- 8.8.8.8 ping statistics ---
> 3 packets transmitted, 3 received, 0% packet loss, time 2130ms
> rtt min/avg/max/mdev = 51.421/53.420/57.008/2.556 ms
> # poweroff
> Feb 28 02:05:30 g-pvops init: starting pid 2386, tty '': '/etc/init.d/halt'
>
> # Usage: /etc/init.d/halt {start}
>
> The system is going down NOW!
>
> Sent SIGTERM to all processes
> Feb 28 02:05:30 g-pvops exiting on signal 15
>
> [ 71.195552] BUG: Bad page map in process iscsid pte:39b22120 pmd:06953067
> [ 71.195569] page:ffffea0000c9ef70 count:1 mapcount:-1
> mapping:ffff88003a536490 index:0x1c8
> [ 71.195576] page flags:
> 0x100000000080078(uptodate|dirty|lru|active|swapbacked)
> [ 71.195585] page dumped because: bad pte
> [ 71.195589] addr:00007fb105d37000 vm_flags:00000070 anon_vma:
> (null) mapping:ffff880032006970 index:c
> [ 71.195598] vma->vm_ops->fault: shmem_fault+0x0/0x70
> [ 71.195603] vma->vm_file->f_op->mmap: shmem_mmap+0x0/0x30
> [ 71.195613] CPU: 0 PID: 2296 Comm: iscsid Not tainted 3.14.0-rc4upstream #1
> [ 71.195618] 00007fb105d37000 ffff880030ff3c28 ffffffff816f0e59
> 0000000000000000
> [ 71.195627] ffff8800302f8378 ffff880030ff3c78 ffffffff81199a5b
> ffff880030ff3c58
> [ 71.195634] ffffffff8117f6e1 ffff880030ff3c58 00007fb105d37000
> ffff8800069539b8
> [ 71.195642] Call Trace:
> [ 71.195649] [<ffffffff816f0e59>] dump_stack+0x51/0x6b
> [ 71.195657] [<ffffffff81199a5b>] print_bad_pte+0x1bb/0x280
> [ 71.195663] [<ffffffff8117f6e1>] ? activate_page+0xb1/0xe0
> [ 71.195669] [<ffffffff8119ad68>] unmap_single_vma+0x8c8/0x910
> [ 71.195676] [<ffffffff81040a69>] ? xen_pte_unlock+0x9/0x10
> [ 71.195680] [<ffffffff8119adfc>] unmap_vmas+0x4c/0xa0
> [ 71.195688] [<ffffffff811a2920>] exit_mmap+0x90/0x160
> [ 71.195694] [<ffffffff816f5f13>] ? _raw_spin_lock_irqsave+0x13/0x60
> [ 71.195702] [<ffffffff8109d672>] mmput+0x52/0x100
> [ 71.195707] [<ffffffff810a186c>] do_exit+0x29c/0xb90
> [ 71.195712] [<ffffffff810a3349>] ? SyS_wait4+0xa9/0xf0
> [ 71.195719] [<ffffffff810a2271>] do_group_exit+0x51/0x130
> [ 71.195724] [<ffffffff810a2362>] SyS_exit_group+0x12/0x20
> [ 71.195732] [<ffffffff816fe7f9>] system_call_fastpath+0x16/0x1b
> [ 71.195736] Disabling lock debugging due to kernel taint
> [ 71.195740] BUG: Bad page map in process iscsid pte:39b23120 pmd:06953067
> [ 71.195744] page:ffffea0000c9efa8 count:2 mapcount:-1
> mapping:ffff88003a536490 index:0x1c9
> [ 71.195751] page flags: 0x100000000080038(uptodate|dirty|lru|swapbacked)
> [ 71.195759] page dumped because: bad pte
> [ 71.195764] addr:00007fb105d38000 vm_flags:00000070 anon_vma:
> (null) mapping:ffff880032006970 index:d
> [ 71.195770] vma->vm_ops->fault: shmem_fault+0x0/0x70
> [ 71.195774] vma->vm_file->f_op->mmap: shmem_mmap+0x0/0x30
> [ 71.195778] CPU: 0 PID: 2296 Comm: iscsid Tainted: G B
> 3.14.0-rc4upstream #1
> [ 71.195783] 00007fb105d38000 ffff880030ff3c28 ffffffff816f0e59
> 0000000000000000
> [ 71.195791] ffff8800302f8378 ffff880030ff3c78 ffffffff81199a5b
> 0000000000000575
> [ 71.195798] 0720072007200720 ffff880030ff3c58 00007fb105d38000
> ffff8800069539c0
> [ 71.195806] Call Trace:
> [ 71.195810] [<ffffffff816f0e59>] dump_stack+0x51/0x6b
> [ 71.195816] [<ffffffff81199a5b>] print_bad_pte+0x1bb/0x280
> [ 71.195820] [<ffffffff8119ad68>] unmap_single_vma+0x8c8/0x910
> [ 71.195827] [<ffffffff81040a69>] ? xen_pte_unlock+0x9/0x10
> [ 71.195832] [<ffffffff8119adfc>] unmap_vmas+0x4c/0xa0
> [ 71.195839] [<ffffffff811a2920>] exit_mmap+0x90/0x160
> [ 71.195843] [<ffffffff816f5f13>] ? _raw_spin_lock_irqsave+0x13/0x60
> [ 71.195849] [<ffffffff8109d672>] mmput+0x52/0x100
> [ 71.195854] [<ffffffff810a186c>] do_exit+0x29c/0xb90
> [ 71.195858] [<ffffffff810a3349>] ? SyS_wait4+0xa9/0xf0
> [ 71.195863] [<ffffffff810a2271>] do_group_exit+0x51/0x130
> [ 71.195870] [<ffffffff810a2362>] SyS_exit_group+0x12/0x20
> [ 71.195875] [<ffffffff816fe7f9>] system_call_fastpath+0x16/0x1b
> [ 71.195880] BUG: Bad page map in process iscsid pte:39b24120 pmd:06953067
> [ 71.195884] page:ffffea0000c9efe0 count:2 mapcount:-1
> mapping:ffff88003a536490 index:0x1ca
> [ 71.195888] page flags: 0x100000000080038(uptodate|dirty|lru|swapbacked)
> [ 71.195895] page dumped because: bad pte
> [ 71.195898] addr:00007fb105d39000 vm_flags:00000070 anon_vma:
> (null) mapping:ffff880032006970 index:e
> [ 71.195904] vma->vm_ops->fault: shmem_fault+0x0/0x70
> [ 71.195908] vma->vm_file->f_op->mmap: shmem_mmap+0x0/0x30
> [ 71.195912] CPU: 0 PID: 2296 Comm: iscsid Tainted: G B
> 3.14.0-rc4upstream #1
> [ 71.195916] 00007fb105d39000 ffff880030ff3c28 ffffffff816f0e59
> 0000000000000000
> [ 71.195923] ffff8800302f8378 ffff880030ff3c78 ffffffff81199a5b
> 000000000000058e
> [ 71.195929] 0720072007200720 ffff880030ff3c58 00007fb105d39000
> ffff8800069539c8
> [ 71.195935] Call Trace:
> [ 71.195939] [<ffffffff816f0e59>] dump_stack+0x51/0x6b
> [ 71.195944] [<ffffffff81199a5b>] print_bad_pte+0x1bb/0x280
> [ 71.195948] [<ffffffff8119ad68>] unmap_single_vma+0x8c8/0x910
> [ 71.195953] [<ffffffff81040a69>] ? xen_pte_unlock+0x9/0x10
> [ 71.195958] [<ffffffff8119adfc>] unmap_vmas+0x4c/0xa0
> [ 71.195963] [<ffffffff811a2920>] exit_mmap+0x90/0x160
> [ 71.195967] [<ffffffff816f5f13>] ? _raw_spin_lock_irqsave+0x13/0x60
> [ 71.195973] [<ffffffff8109d672>] mmput+0x52/0x100
> [ 71.195977] [<ffffffff810a186c>] do_exit+0x29c/0xb90
> [ 71.195982] [<ffffffff810a3349>] ? SyS_wait4+0xa9/0xf0
> [ 71.195987] [<ffffffff810a2271>] do_group_exit+0x51/0x130
> [ 71.195992] [<ffffffff810a2362>] SyS_exit_group+0x12/0x20
> [ 71.195997] [<ffffffff816fe7f9>] system_call_fastpath+0x16/0x1b
> [ 71.196001] BUG: Bad page map in process iscsid pte:39b25120 pmd:06953067
> [ 71.196005] page:ffffea0000c9f018 count:2 mapcount:-1
> mapping:ffff88003a536490 index:0x1cb
> [ 71.362165] page flags: 0x100000000080038(uptodate|dirty|lru|swapbacked)
> [ 71.362172] page dumped because: bad pte
> [ 71.362175] addr:00007fb105d3a000 vm_flags:00000070 anon_vma:
> (null) mapping:ffff880032006970 index:f
> [ 71.362181] vma->vm_ops->fault: shmem_fault+0x0/0x70
> [ 71.362185] vma->vm_file->f_op->mmap: shmem_mmap+0x0/0x30
> [ 71.362193] CPU: 0 PID: 2296 Comm: iscsid Tainted: G B
> 3.14.0-rc4upstream #1
> [ 71.362197] 00007fb105d3a000 ffff880030ff3c28 ffffffff816f0e59
> 0000000000000000
> [ 71.362206] ffff8800302f8378 ffff880030ff3c78 ffffffff81199a5b
> 00000000000005a7
> [ 71.362212] 0720072007200720 ffff880030ff3c58 00007fb105d3a000
> ffff8800069539d0
> [ 71.362221] Call Trace:
> [ 71.362225] [<ffffffff816f0e59>] dump_stack+0x51/0x6b
> [ 71.362230] [<ffffffff81199a5b>] print_bad_pte+0x1bb/0x280
> [ 71.362241] [<ffffffff8119ad68>] unmap_single_vma+0x8c8/0x910
> [ 71.362247] [<ffffffff81040a69>] ? xen_pte_unlock+0x9/0x10
> [ 71.362254] [<ffffffff8119adfc>] unmap_vmas+0x4c/0xa0
> [ 71.362258] [<ffffffff811a2920>] exit_mmap+0x90/0x160
> [ 71.362263] [<ffffffff816f5f13>] ? _raw_spin_lock_irqsave+0x13/0x60
> [ 71.362270] [<ffffffff8109d672>] mmput+0x52/0x100
> [ 71.362276] [<ffffffff810a186c>] do_exit+0x29c/0xb90
> [ 71.362282] [<ffffffff810a3349>] ? SyS_wait4+0xa9/0xf0
> [ 71.362287] [<ffffffff810a2271>] do_group_exit+0x51/0x130
> [ 71.362292] [<ffffffff810a2362>] SyS_exit_group+0x12/0x20
> [ 71.362297] [<ffffffff816fe7f9>] system_call_fastpath+0x16/0x1b
> [ 71.364639] BUG: Bad page state in process iscsid pfn:39b25
> [ 71.364651] page:ffffea0000c9f018 count:0 mapcount:-1
> mapping:ffff88003a536490 index:0x1cb
> [ 71.364656] page flags: 0x100000000080018(uptodate|dirty|swapbacked)
> [ 71.364663] page dumped because: non-NULL mapping
> [ 71.364666] Modules linked in: dm_multipath dm_mod xen_evtchn
> iscsi_boot_sysfs iscsi_tcp libiscsi_tcp libiscsi scsi_transport_iscsi
> scsi_mod libcrc32c crc32c fbcon tileblit font radeon bitblit softcursor ttm
> drm_kms_helper xen_blkfront xen_netfront xen_fbfront fb_sys_fops sysimgblt
> sysfillrect syscopyarea xen_kbdfront xenfs xen_privcmd
> [ 71.364706] CPU: 0 PID: 2296 Comm: iscsid Tainted: G B
> 3.14.0-rc4upstream #1
> [ 71.364711] ffffffff8197f00f ffff880030ff3bb8 ffffffff816f0e59
> ffffffff8197f00f
> [ 71.364718] ffffea0000c9f018 ffff880030ff3be8 ffffffff811751a0
> ffff880030ff3c48
> [ 71.364724] 0000000000000001 ffffea0000c9f018 0000000000000000
> ffff880030ff3c48
> [ 71.364733] Call Trace:
> [ 71.364739] [<ffffffff816f0e59>] dump_stack+0x51/0x6b
> [ 71.364748] [<ffffffff811751a0>] bad_page+0xd0/0x120
> [ 71.364753] [<ffffffff81175335>] free_pages_prepare+0x145/0x160
> [ 71.364760] [<ffffffff81041642>] ? xen_pte_val+0x32/0x40
> [ 71.364768] [<ffffffff8117993b>] free_hot_cold_page+0x3b/0x150
> [ 71.364773] [<ffffffff81179fc7>] free_hot_cold_page_list+0x47/0xb0
> [ 71.364780] [<ffffffff8117e3ad>] release_pages+0x7d/0x230
> [ 71.364785] [<ffffffff811b04c4>] free_pages_and_swap_cache+0xb4/0xe0
> [ 71.364791] [<ffffffff81099507>] ? flush_tlb_mm_range+0x57/0x1b0
> [ 71.364798] [<ffffffff81199cb7>] tlb_flush_mmu+0x57/0xa0
> [ 71.364803] [<ffffffff81199d0f>] tlb_finish_mmu+0xf/0x40
> [ 71.364810] [<ffffffff811a2947>] exit_mmap+0xb7/0x160
> [ 71.364815] [<ffffffff816f5f12>] ? _raw_spin_lock_irqsave+0x12/0x60
> [ 71.364820] [<ffffffff8109d672>] mmput+0x52/0x100
> [ 71.364825] [<ffffffff810a186c>] do_exit+0x29c/0xb90
> [ 71.364830] [<ffffffff810a3349>] ? SyS_wait4+0xa9/0xf0
> [ 71.364835] [<ffffffff810a2271>] do_group_exit+0x51/0x130
> [ 71.364842] [<ffffffff810a2362>] SyS_exit_group+0x12/0x20
> [ 71.364848] [<ffffffff816fe7f9>] system_call_fastpath+0x16/0x1b
> [ 71.364854] BUG: Bad page state in process iscsid pfn:39b24
> [ 71.364858] page:ffffea0000c9efe0 count:0 mapcount:-1
> mapping:ffff88003a536490 index:0x1ca
> [ 71.364863] page flags: 0x100000000080018(uptodate|dirty|swapbacked)
> [ 71.364871] page dumped because: non-NULL mapping
> [ 71.364874] Modules linked in: dm_multipath dm_mod xen_evtchn
> iscsi_boot_sysfs iscsi_tcp libiscsi_tcp libiscsi scsi_transport_iscsi
> scsi_mod libcrc32c crc32c fbcon tileblit font radeon bitblit softcursor ttm
> drm_kms_helper xen_blkfront xen_netfront xen_fbfront fb_sys_fops sysimgblt
> sysfillrect syscopyarea xen_kbdfront xenfs xen_privcmd
> [ 71.364906] CPU: 0 PID: 2296 Comm: iscsid Tainted: G B
> 3.14.0-rc4upstream #1
> [ 71.364913] ffffffff8197f00f ffff880030ff3bb8 ffffffff816f0e59
> ffffffff8197f00f
> [ 71.364919] ffffea0000c9efe0 ffff880030ff3be8 ffffffff811751a0
> ffff880030ff3c48
> [ 71.364925] 0000000000000001 ffffea0000c9efe0 0000000000000000
> ffff880030ff3c48
> [ 71.364933] Call Trace:
> [ 71.364938] [<ffffffff816f0e59>] dump_stack+0x51/0x6b
> [ 71.364945] [<ffffffff811751a0>] bad_page+0xd0/0x120
> [ 71.364950] [<ffffffff81175335>] free_pages_prepare+0x145/0x160
> [ 71.364955] [<ffffffff81041642>] ? xen_pte_val+0x32/0x40
> [ 71.364960] [<ffffffff8117993b>] free_hot_cold_page+0x3b/0x150
> [ 71.364965] [<ffffffff81179fc7>] free_hot_cold_page_list+0x47/0xb0
> [ 71.364970] [<ffffffff8117e3ad>] release_pages+0x7d/0x230
> [ 71.364975] [<ffffffff811b04c4>] free_pages_and_swap_cache+0xb4/0xe0
> [ 71.364982] [<ffffffff81099507>] ? flush_tlb_mm_range+0x57/0x1b0
> [ 71.364987] [<ffffffff81199cb7>] tlb_flush_mmu+0x57/0xa0
> [ 71.364994] [<ffffffff81199d0f>] tlb_finish_mmu+0xf/0x40
> [ 71.364999] [<ffffffff811a2947>] exit_mmap+0xb7/0x160
> [ 71.365004] [<ffffffff816f5f12>] ? _raw_spin_lock_irqsave+0x12/0x60
> [ 71.365009] [<ffffffff8109d672>] mmput+0x52/0x100
> [ 71.365015] [<ffffffff810a186c>] do_exit+0x29c/0xb90
> [ 71.365020] [<ffffffff810a3349>] ? SyS_wait4+0xa9/0xf0
> [ 71.365025] [<ffffffff810a2271>] do_group_exit+0x51/0x130
> [ 71.365030] [<ffffffff810a2362>] SyS_exit_group+0x12/0x20
> [ 71.365035] [<ffffffff816fe7f9>] system_call_fastpath+0x16/0x1b
> [ 71.365039] BUG: Bad page state in process iscsid pfn:39b23
> [ 71.365043] page:ffffea0000c9efa8 count:0 mapcount:-1
> mapping:ffff88003a536490 index:0x1c9
> [ 71.365047] page flags: 0x100000000080018(uptodate|dirty|swapbacked)
> [ 71.365074] page dumped because: non-NULL mapping
> [ 71.365077] Modules linked in: dm_multipath dm_mod xen_evtchn
> iscsi_boot_sysfs iscsi_tcp libiscsi_tcp libiscsi scsi_transport_iscsi
> scsi_mod libcrc32c crc32c fbcon tileblit font radeon bitblit softcursor ttm
> drm_kms_helper xen_blkfront xen_netfront xen_fbfront fb_sys_fops sysimgblt
> sysfillrect syscopyarea xen_kbdfront xenfs xen_privcmd
> [ 71.365104] CPU: 0 PID: 2296 Comm: iscsid Tainted: G B
> 3.14.0-rc4upstream #1
> [ 71.365109] ffffffff8197f00f ffff880030ff3bb8 ffffffff816f0e59
> ffffffff8197f00f
> [ 71.365115] ffffea0000c9efa8 ffff880030ff3be8 ffffffff811751a0
> ffff880030ff3c48
> [ 71.365121] 0000000000000001 ffffea0000c9efa8 0000000000000000
> ffff880030ff3c48
> [ 71.365127] Call Trace:
> [ 71.365131] [<ffffffff816f0e59>] dump_stack+0x51/0x6b
> [ 71.365136] [<ffffffff811751a0>] bad_page+0xd0/0x120
> [ 71.365141] [<ffffffff81175335>] free_pages_prepare+0x145/0x160
> [ 71.365146] [<ffffffff81041642>] ? xen_pte_val+0x32/0x40
> [ 71.365151] [<ffffffff8117993b>] free_hot_cold_page+0x3b/0x150
> [ 71.365155] [<ffffffff81179fc7>] free_hot_cold_page_list+0x47/0xb0
> [ 71.365160] [<ffffffff8117e3ad>] release_pages+0x7d/0x230
> [ 71.365165] [<ffffffff811b04c4>] free_pages_and_swap_cache+0xb4/0xe0
> [ 71.365170] [<ffffffff81099507>] ? flush_tlb_mm_range+0x57/0x1b0
> [ 71.365175] [<ffffffff81199cb7>] tlb_flush_mmu+0x57/0xa0
> [ 71.365180] [<ffffffff81199d0f>] tlb_finish_mmu+0xf/0x40
> [ 71.562344] [<ffffffff811a2947>] exit_mmap+0xb7/0x160
> [ 71.562349] [<ffffffff816f5f12>] ? _raw_spin_lock_irqsave+0x12/0x60
> [ 71.562354] [<ffffffff8109d672>] mmput+0x52/0x100
> [ 71.562359] [<ffffffff810a186c>] do_exit+0x29c/0xb90
> [ 71.562364] [<ffffffff810a3349>] ? SyS_wait4+0xa9/0xf0
> [ 71.562369] [<ffffffff810a2271>] do_group_exit+0x51/0x130
> [ 71.562379] [<ffffffff810a2362>] SyS_exit_group+0x12/0x20
> [ 71.562387] [<ffffffff816fe7f9>] system_call_fastpath+0x16/0x1b
> [ 71.562391] BUG: Bad page state in process iscsid pfn:39b22
> [ 71.562395] page:ffffea0000c9ef70 count:0 mapcount:-1
> mapping:ffff88003a536490 index:0x1c8
> [ 71.562399] page flags: 0x100000000080018(uptodate|dirty|swapbacked)
> [ 71.562413] page dumped because: non-NULL mapping
> [ 71.562420] Modules linked in: dm_multipath dm_mod xen_evtchn
> iscsi_boot_sysfs iscsi_tcp libiscsi_tcp libiscsi scsi_transport_iscsi
> scsi_mod libcrc32c crc32c fbcon tileblit font radeon bitblit softcursor ttm
> drm_kms_helper xen_blkfront xen_netfront xen_fbfront fb_sys_fops sysimgblt
> sysfillrect syscopyarea xen_kbdfront xenfs xen_privcmd
> [ 71.562456] CPU: 0 PID: 2296 Comm: iscsid Tainted: G B
> 3.14.0-rc4upstream #1
> [ 71.562461] ffffffff8197f00f ffff880030ff3bb8 ffffffff816f0e59
> ffffffff8197f00f
> [ 71.562467] ffffea0000c9ef70 ffff880030ff3be8 ffffffff811751a0
> ffff880030ff3c48
> [ 71.562476] 0000000000000001 ffffea0000c9ef70 0000000000000000
> ffff880030ff3c48
> [ 71.562486] Call Trace:
> [ 71.562490] [<ffffffff816f0e59>] dump_stack+0x51/0x6b
> [ 71.562495] [<ffffffff811751a0>] bad_page+0xd0/0x120
> [ 71.562500] [<ffffffff81175335>] free_pages_prepare+0x145/0x160
> [ 71.562515] [<ffffffff81041642>] ? xen_pte_val+0x32/0x40
> [ 71.562520] [<ffffffff8117993b>] free_hot_cold_page+0x3b/0x150
> [ 71.562525] [<ffffffff81179fc7>] free_hot_cold_page_list+0x47/0xb0
> [ 71.562535] [<ffffffff8117e3ad>] release_pages+0x7d/0x230
> [ 71.562544] [<ffffffff811b04c4>] free_pages_and_swap_cache+0xb4/0xe0
> [ 71.562550] [<ffffffff81099507>] ? flush_tlb_mm_range+0x57/0x1b0
> [ 71.562555] [<ffffffff81199cb7>] tlb_flush_mmu+0x57/0xa0
> [ 71.562561] [<ffffffff81199d0f>] tlb_finish_mmu+0xf/0x40
> [ 71.562568] [<ffffffff811a2947>] exit_mmap+0xb7/0x160
> [ 71.562579] [<ffffffff816f5f12>] ? _raw_spin_lock_irqsave+0x12/0x60
> [ 71.562584] [<ffffffff8109d672>] mmput+0x52/0x100
> [ 71.562594] [<ffffffff810a186c>] do_exit+0x29c/0xb90
> [ 71.562603] [<ffffffff810a3349>] ? SyS_wait4+0xa9/0xf0
> [ 71.562608] [<ffffffff810a2271>] do_group_exit+0x51/0x130
> [ 71.562613] [<ffffffff810a2362>] SyS_exit_group+0x12/0x20
> [ 71.562617] [<ffffffff816fe7f9>] system_call_fastpath+0x16/0x1b
>
> Sent SIGKILL to all processes
>
> Requesting system poweroff
> [ 73.375423] reboot: System halted
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