Re: [Xen-devel] [PATCH] xen: correctly restore pfn_to_mfn_list_list after resume

[Ian Campbell <Ian.Campbell@xxxxxxxxxx>]

On Mon, 2009-11-30 at 10:17 +0000, Bartosz Lis wrote:
> Unfortunately save/restore does not work for 64bit kernel/userland in dom0 
> and 
> 32bit kernel/userland in domU (tested with 1 and then with 2 vcpus). Save 
> hangs. Save file is ~1.5kB long and I'm getting on guest's console:

You stack trace looks like the issue resolved by "xen: do not unmap
grant status on suspend when using v1 grant tables" sent to the list on
Wednesday.

> ----8<----
> [   34.729250] BUG: unable to handle kernel paging request at c1527000        
>                                                                      
> [   34.729271] IP: [<c1006593>] xen_set_pmd+0x73/0xb0                         
>   
> [   34.729288] *pdpt = 0000000403162027                                       
>   
> [   34.729299] Oops: 0003 [#1] SMP                                            
>   
> [   34.729312] last sysfs file: /sys/module/ip_tables/initstate               
>   
> [   34.729321] Modules linked in: sch_sfq xt_limit ipt_REJECT xt_tcpudp 
> ipt_LOG xt_state xt_multiport iptable_filter iptable_nat nf_nat 
> nf_conntrack_ipv4 nf_conntrack nf_defrag_ipv4 iptable_mangle ip_tables 
> x_tables xenfs dm_multipath scsi_dh dm_mod st sd_mod crc_t10dif lpfc qla2xxx 
> scsi_transport_fc scsi_tgt qla1280 scsi_mod psmouse uhci_hcd ehci_hcd usbcore 
> pcspkr xen_netfront evdev ext3 jbd mbcache                                    
>                                         
> [   34.729485]                                                                
>   
> [   34.729493] Pid: 1686, comm: kstop/0 xid: #0 Not tainted 
> (2.6.31.6x_xenUnogrsecuritypae-BL5.5 #1)                                      
>                       
> [   34.729504] EIP: 0061:[<c1006593>] EFLAGS: 00010046 CPU: 0                 
>   
> [   34.729513] EIP is at xen_set_pmd+0x73/0xb0                                
>   
> [   34.729520] EAX: c1527000 EBX: 031f3067 ECX: 00000004 EDX: c179b000        
>   
> [   34.729529] ESI: 00000004 EDI: c1527000 EBP: ddd75eb0 ESP: ddd75ea0        
>   
> [   34.729538]  DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: 0069                  
>   
> [   34.729547] Process kstop/0 (pid: 1686, ti=ddd74000 task=df8f48c0 
> task.ti=ddd74000)                                                             
>              
> [   34.729557] Stack:                                                         
>   
> [   34.729563]  c1527000 031f3067 1fd61067 c1527000 ddd75ec4 c10cd650 
> 00000000 
> 00000000                                                                      
>    
> [   34.729595] <0> 00200000 ddd75f20 c10ceb14 00000000 123ab067 00000000 
> 00000fff 00001000                                                             
>          
> [   34.729630] <0> 00000fff c1463000 c1474f60 01ba9067 00000000 ddd75f14 
> c1006f3a c153001c                                                             
>          
> [   34.729670] Call Trace:                                                    
>   
> [   34.729682]  [<c10cd650>] ? __pte_alloc_kernel+0xa0/0xb0                   
>   
> [   34.729693]  [<c10ceb14>] ? apply_to_page_range+0x314/0x330                
>   
> [   34.729705]  [<c1006f3a>] ? xen_force_evtchn_callback+0x1a/0x30            
>   
> [   34.729717]  [<c10079c6>] ? arch_gnttab_unmap+0x26/0x30                    
>   
> [   34.729729]  [<c1007950>] ? unmap_pte_fn+0x0/0x50                          
>   
> [   34.729742]  [<c1204591>] ? gnttab_suspend+0x41/0x50                       
>   
> [   34.729753]  [<c120756a>] ? xen_suspend+0x3a/0xf0                          
>   
> [   34.729765]  [<c108873d>] ? stop_cpu+0x8d/0xd0                             
>   
> [   34.729776]  [<c1054022>] ? worker_thread+0x112/0x220                      
>   
> [   34.729787]  [<c10886b0>] ? stop_cpu+0x0/0xd0                              
>   
> [   34.729798]  [<c10587e0>] ? autoremove_wake_function+0x0/0x40              
>   
> [   34.729810]  [<c1053f10>] ? worker_thread+0x0/0x220                        
>   
> [   34.729821]  [<c10584ec>] ? kthread+0x7c/0x90                              
>   
> [   34.729831]  [<c1058470>] ? kthread+0x0/0x90                               
>   
> [   34.729843]  [<c100ad17>] ? kernel_thread_helper+0x7/0x10                  
>   
> [   34.729851] Code: 00 75 48 8b 45 f0 89 da 89 f1 83 05 fc 32 53 c1 01 e8 e2 
> fe ff ff 8b 5d f4 8b 75 f8 8b 7d fc 89 ec 5d c3 90 8d 74 26 00 8b 45 f0 <89> 
> 18 89 70 04 eb e4 ba e0 32 53 c1 b9 33 00 00 00 31 c0 89 d7                   
>        
> [   34.730076] EIP: [<c1006593>] xen_set_pmd+0x73/0xb0 SS:ESP 0069:ddd75ea0   
>   
> [   34.730093] CR2: 00000000c1527000                                          
>   
> [   34.730102] ---[ end trace cd1b831872a4c87f ]---                           
>   
> [   34.730137] ------------[ cut here ]------------                           
>   
> [   34.730147] WARNING: at /root/rpm/BUILD/kernel-
> xenUnogrsecuritypae-2.6.31.6x/linux-2.6.31/kernel/time/timekeeping.c:102 
> getnstimeofday+0x102/0x110()         
> [   34.730160] Modules linked in: sch_sfq xt_limit ipt_REJECT xt_tcpudp 
> ipt_LOG xt_state xt_multiport iptable_filter iptable_nat nf_nat 
> nf_conntrack_ipv4 nf_conntrack nf_defrag_ipv4 iptable_mangle ip_tables 
> x_tables xenfs dm_multipath scsi_dh dm_mod st sd_mod crc_t10dif lpfc qla2xxx 
> scsi_transport_fc scsi_tgt qla1280 scsi_mod psmouse uhci_hcd ehci_hcd usbcore 
> pcspkr xen_netfront evdev ext3 jbd mbcache
> [   34.730316] Pid: 0, comm: swapper xid: #0 Tainted: G      D    
> 2.6.31.6x_xenUnogrsecuritypae-BL5.5 #1
> [   34.730326] Call Trace:
> [   34.730338]  [<c1333d7a>] ? printk+0x18/0x1e
> [   34.730349]  [<c1040fcd>] warn_slowpath_common+0x6d/0xa0
> [   34.730360]  [<c106b7d2>] ? getnstimeofday+0x102/0x110
> [   34.730370]  [<c106b7d2>] ? getnstimeofday+0x102/0x110
> [   34.730381]  [<c1041015>] warn_slowpath_null+0x15/0x20
> [   34.730392]  [<c106b7d2>] getnstimeofday+0x102/0x110
> [   34.730403]  [<c105c716>] ktime_get_ts+0x26/0x60
> [   34.730413]  [<c105c766>] ktime_get+0x16/0x40
> [   34.730425]  [<c107056c>] tick_nohz_stop_sched_tick+0x6c/0x390
> [   34.730437]  [<c1009187>] cpu_idle+0x27/0x80
> [   34.730449]  [<c1323e25>] rest_init+0x55/0x60
> [   34.730461]  [<c14a186c>] start_kernel+0x2fb/0x301
> [   34.730472]  [<c14a138e>] ? unknown_bootoption+0x0/0x1ad
> [   34.730483]  [<c14a108d>] i386_start_kernel+0x7c/0x83
> [   34.730494]  [<c14a418e>] xen_start_kernel+0x517/0x51f
> [   34.730502] ---[ end trace cd1b831872a4c880 ]---
> ----8<----
> 
> I'm going to try newer commits.
> 
> Regards,
> 



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