Show tech and cpu load

Hello
we have 2 6500 in VSS , with image 15.1(1)SY1.
I had to do show tech as there was some issue in our network , when i gave this command immidiately show process cpu output showed usage as 100% and resource was SSH Process and show tech output never got complete session got hanged and I had to open new VTY session
I want to know does this happen eveytime when we give show tech or there is a issue with our device .

Amit
It is not necessarily an issue with your switches. When you are logged in via the vty lines and you issue a command like "sh tech" there is a large amount of data to be displayed and it is normal for the CPU to spike when it does this -
Q. How can we reduce the process for SSH on 6500?
A. If it is virtual exec, that is used for servicing vty lines, Vty lines are used for logging into the switch. If we are trying to dump a huge output like "show tech", it is expected to see high CPU and is not a matter for concern.
full link -
https://supportforums.cisco.com/docs/DOC-22037
so what you are seeing is normal. But what is not normal is the display getting hung and having to open a new session.
So if it happens all the time it would be a problem but it could just be that at that particular time the switch was busy doing other things that also placed a load on the CPU.
Jon

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      52        1304      342532          3  0.00%  0.00%  0.00%   0 Compute load avg
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      55           4       10570          0  0.00%  0.00%  0.00%   0 Transport Port A
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      58           0           1          0  0.00%  0.00%  0.00%   0 POS APS Event Pr
      59           0           1          0  0.00%  0.00%  0.00%   0 SONET alarm time
      60           0           1          0  0.00%  0.00%  0.00%   0 CSP Timer       
      61         204           4      51000  0.00%  0.00%  0.00%   0 USB Startup     
      62           0           2          0  0.00%  0.00%  0.00%   0 FPD Management P
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      64           0           2          0  0.00%  0.00%  0.00%   0 VNM DSPRM MAIN  
      65           0           1          0  0.00%  0.00%  0.00%   0 RF_INTERDEV_DELA
      66           0           1          0  0.00%  0.00%  0.00%   0 RF_INTERDEV_SCTP
      67         464     1712577          0  0.00%  0.00%  0.00%   0 ISA Common Helpe
      68           0           2          0  0.00%  0.00%  0.00%   0 Flash MIB Update
      69           0          58          0  0.00%  0.00%  0.00%   0 Flash Card Oir  
      70           0           1          0  0.00%  0.00%  0.00%   0 CES Line Conditi
      71           0           1          0  0.00%  0.00%  0.00%   0 CF_INTERDEV_SCTP
      72           0           1          0  0.00%  0.00%  0.00%   0 Async write proc
      73           0           2          0  0.00%  0.00%  0.00%   0 Ethernet CFM    
      74         736     1670893          0  0.00%  0.00%  0.00%   0 Ethernet Timer C
      75           0           1          0  0.00%  0.00%  0.00%   0 delayed evt hand
      76          28         112        250  0.00%  0.00%  0.00%   0 AAA Server      
      77           0           1          0  0.00%  0.00%  0.00%   0 AAA ACCT Proc   
      78           0           1          0  0.00%  0.00%  0.00%   0 ACCT Periodic Pr
      79           0           2          0  0.00%  0.00%  0.00%   0 AAA Dictionary R
      80         744     1670882          0  0.00%  0.00%  0.00%   0 BGP Scheduler   
      81           0           2          0  0.00%  0.00%  0.00%   0 Ethernet OAM Pro
      82           0           2          0  0.00%  0.00%  0.00%   0 Ethernet LMI    
      83           0           2          0  0.00%  0.00%  0.00%   0 CEF switching ba
      84        3684       14726        250  0.00%  0.00%  0.00%   0 ADJ resolve proc
      85           8          30        266  0.00%  0.00%  0.00%   0 IP ARP Adjacency
      86           0           1          0  0.00%  0.00%  0.00%   0 IP ARP Retry Age
      87     3481296     6804010        511  0.00%  0.02%  0.01%   0 IP Input        
      88           0           1          0  0.00%  0.00%  0.00%   0 ICMP event handl
      89           0           9          0  0.00%  0.00%  0.00%   0 TurboACL        
      90           0           2          0  0.00%  0.00%  0.00%   0 TurboACL chunk  
    PID Runtime(ms)     Invoked      uSecs   5Sec   1Min   5Min TTY Process
      91           0           1          0  0.00%  0.00%  0.00%   0 IPv6 Echo event 
      92          16        2854          5  0.00%  0.00%  0.00%   0 MOP Protocols   
      93           0           1          0  0.00%  0.00%  0.00%   0 LSP Tunnel FRR  
      94           0           1          0  0.00%  0.00%  0.00%   0 MPLS Auto-Tunnel
      95           0           3          0  0.00%  0.00%  0.00%   0 PPP Hooks       
      96           0           1          0  0.00%  0.00%  0.00%   0 Async write proc
      97           0           1          0  0.00%  0.00%  0.00%   0 SSS Manager     
      98           0           1          0  0.00%  0.00%  0.00%   0 SSS Feature Mana
      99           0           1          0  0.00%  0.00%  0.00%   0 SSS Feature Time
    100           0           2          0  0.00%  0.00%  0.00%   0 Spanning Tree   
    101           0           1          0  0.00%  0.00%  0.00%   0 X.25 Encaps Mana
    102          20          96        208  0.00%  0.00%  0.00%   0 SSM connection m
    103           0           1          0  0.00%  0.00%  0.00%   0 AC Switch       
    104           4        5709          0  0.00%  0.00%  0.00%   0 Authentication P
    105           0           1          0  0.00%  0.00%  0.00%   0 Auth-proxy AAA B
    106           0           2          0  0.00%  0.00%  0.00%   0 EAPoUDP Process 
    107           0           2          0  0.00%  0.00%  0.00%   0 IP Host Track Pr
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    110        2276       28582         79  0.00%  0.00%  0.00%   0 IP RIB Update   
    111          60       34442          1  0.00%  0.00%  0.00%   0 CEF background p
    112        6784     2485297          2  0.00%  0.00%  0.00%   0 CEF: IPv4 proces
    113          12         104        115  0.00%  0.00%  0.00%   0 ADJ background  
    114           0           2          0  0.00%  0.00%  0.00%   0 PPP IP Route    
    115           0           2          0  0.00%  0.00%  0.00%   0 PPP IPCP        
    116           0           1          0  0.00%  0.00%  0.00%   0 IP Traceroute   
    117        7292     7550370          0  0.00%  0.00%  0.00%   0 TCP Timer       
    118        1300       10511        123  0.00%  0.00%  0.00%   0 TCP Protocols   
    119           0           1          0  0.00%  0.00%  0.00%   0 Socket Timers   
    120       18228       11429       1594  0.00%  0.00%  0.00%   0 HTTP CORE       
    121           0           2          0  0.00%  0.00%  0.00%   0 RLM groups Proce
    122           0           1          0  0.00%  0.00%  0.00%   0 L2X Data Daemon 
    123           0           1          0  0.00%  0.00%  0.00%   0 ac_atm_state_eve
    124           0           2          0  0.00%  0.00%  0.00%   0 SNMP Timers     
    125        1320     1710737          0  0.00%  0.00%  0.00%   0 RUDPV1 Main Proc
    126           0           1          0  0.00%  0.00%  0.00%   0 bsm_timers      
    127         568     1710728          0  0.00%  0.00%  0.00%   0 bsm_xmt_proc    
    128           0           1          0  0.00%  0.00%  0.00%   0 COPS            
    129           0           2          0  0.00%  0.00%  0.00%   0 Dialer Forwarder
    130           0           3          0  0.00%  0.00%  0.00%   0 Flow Exporter Ti
    131           0           2          0  0.00%  0.00%  0.00%   0 ATM OAM Input   
    132           0           2          0  0.00%  0.00%  0.00%   0 ATM OAM TIMER   
    133           0           1          0  0.00%  0.00%  0.00%   0 RARP Input      
    134           0           1          0  0.00%  0.00%  0.00%   0 IPv6 Inspect Tim
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    136           0           2          0  0.00%  0.00%  0.00%   0 LFDp Input Proc 
    PID Runtime(ms)     Invoked      uSecs   5Sec   1Min   5Min TTY Process
    137           0           1          0  0.00%  0.00%  0.00%   0 PAD InCall      
    138           0           2          0  0.00%  0.00%  0.00%   0 X.25 Background 
    139           0           2          0  0.00%  0.00%  0.00%   0 PPP Bind        
    140           0           2          0  0.00%  0.00%  0.00%   0 PPP SSS         
    141           0           1          0  0.00%  0.00%  0.00%   0 MQC Flow Event B
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    144           0           2          0  0.00%  0.00%  0.00%   0 SCTP Main Proces
    145           0           1          0  0.00%  0.00%  0.00%   0 VPDN call manage
    146           0           1          0  0.00%  0.00%  0.00%   0 CHKPT EXAMPLE   
    147           0           1          0  0.00%  0.00%  0.00%   0 CHKPT DevTest   
    148           0           1          0  0.00%  0.00%  0.00%   0 IPS Process     
    149           0           2          0  0.00%  0.00%  0.00%   0 IPS Auto Update 
    150           0           2          0  0.00%  0.00%  0.00%   0 SDEE Management 
    151         948     3338807          0  0.00%  0.00%  0.00%   0 Inspect process 
    152           0           1          0  0.00%  0.00%  0.00%   0 xcpa-driver     
    153          52      136947          0  0.00%  0.00%  0.00%   0 FW DP Inspect pr
    154        1112     3338806          0  0.00%  0.00%  0.00%   0 CCE DP URLF cach
    155           0           2          0  0.00%  0.00%  0.00%   0 URL filter proc 
    156           0           1          0  0.00%  0.00%  0.00%   0 XSM_EVENT_ENGINE
    157         144      171238          0  0.00%  0.00%  0.00%   0 XSM_ENQUEUER    
    158          68      171238          0  0.00%  0.00%  0.00%   0 XSM Historian   
    159           0           1          0  0.00%  0.00%  0.00%   0 Select Timers   
    160           4           2       2000  0.00%  0.00%  0.00%   0 HTTP Process    
    161           0           2          0  0.00%  0.00%  0.00%   0 CIFS API Process
    162           0           2          0  0.00%  0.00%  0.00%   0 CIFS Proxy Proce
    163           0           1          0  0.00%  0.00%  0.00%   0 Crypto HW Proc  
    164          56      114166          0  0.00%  0.00%  0.00%   0 ACE policy loade
    165         156       68505          2  0.00%  0.00%  0.00%   0 CRM_CALL_UPDATE_
    166       36688      172862        212  0.00%  0.00%  0.00%   0 BGP I/O         
    167           0           2          0  0.00%  0.00%  0.00%   0 AAA Cached Serve
    168           0           2          0  0.00%  0.00%  0.00%   0 ENABLE AAA      
    169           0           1          0  0.00%  0.00%  0.00%   0 EM Background Pr
    170           0           1          0  0.00%  0.00%  0.00%   0 Key chain liveke
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    172          44         112        392  0.00%  0.00%  0.00%   0 LOCAL AAA       
    173           0          42          0  0.00%  0.00%  0.00%   0 MPLS Auto Mesh P
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    175           0           2          0  0.00%  0.00%  0.00%   0 VSP_MGR         
    176           0           1          0  0.00%  0.00%  0.00%   0 FW_TEST_TRP     
    177           0           1          0  0.00%  0.00%  0.00%   0 EPM MAIN PROCESS
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    179           0           2          0  0.00%  0.00%  0.00%   0 Crypto Support  
    180           0           1          0  0.00%  0.00%  0.00%   0 IPSECv6 PS Proc 
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    182           0           1          0  0.00%  0.00%  0.00%   0 CCVPM_R2        
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    183           0           1          0  0.00%  0.00%  0.00%   0 EPHONE MWI Refre
    184           0        1903          0  0.00%  0.00%  0.00%   0 FB/KS Log HouseK
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    186           0           1          0  0.00%  0.00%  0.00%   0 Skinny HW confer
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    188      206492      114180       1808  0.00%  0.00%  0.00%   0 BGP Scanner     
    189           0           1          0  0.00%  0.00%  0.00%   0 http client proc
    190           0           3          0  0.00%  0.00%  0.00%   0 BGP Event       
    191           0           1          0  0.00%  0.00%  0.00%   0 QOS_MODULE_MAIN 
    192           0           1          0  0.00%  0.00%  0.00%   0 RPMS_PROC_MAIN  
    193           0           1          0  0.00%  0.00%  0.00%   0 VoIP AAA        
    194           0           2          0  0.00%  0.00%  0.00%   0 Dialog Manager  
    195         184         104       1769  0.00%  0.00%  0.00%   0 crypto engine pr
    196           0           4          0  0.00%  0.00%  0.00%   0 Crypto CA       
    197           0           1          0  0.00%  0.00%  0.00%   0 Crypto PKI-CRL  
    198       28008       64288        435  0.00%  0.00%  0.00%   0 encrypt proc    
    199      384768       28300      13596  0.00%  0.00%  0.00%   0 crypto sw pk pro
    200           8          27        296  0.00%  0.00%  0.00%   0 Crypto INT      
    201         456        2019        225  0.00%  0.00%  0.00%   0 Crypto IKE Dispa
    202        2128        2714        784  0.00%  0.00%  0.00%   0 Crypto IKMP     
    203           0           1          0  0.00%  0.00%  0.00%   0 IPSEC manual key
    204         180       85737          2  0.00%  0.00%  0.00%   0 IPSEC key engine
    205           0           1          0  0.00%  0.00%  0.00%   0 CRYPTO QoS proce
    206          28         142        197  0.00%  0.00%  0.00%   0 Crypto ACL      
    207           0           1          0  0.00%  0.00%  0.00%   0 Crypto PAS Proc 
    208           0           1          0  0.00%  0.00%  0.00%   0 GDOI GM Process 
    209           0           1          0  0.00%  0.00%  0.00%   0 UNICAST REKEY   
    210           0           1          0  0.00%  0.00%  0.00%   0 UNICAST REKEY AC
    211           0           1          0  0.00%  0.00%  0.00%   0 MV64 TDR Process
    212           0           1          0  0.00%  0.00%  0.00%   0 IMA Traps       
    213           0           1          0  0.00%  0.00%  0.00%   0 SYSMGT Events   
    214           0           2          0  0.00%  0.00%  0.00%   0 Control-plane ho
    215           0           1          0  0.00%  0.00%  0.00%   0 DATA Transfer Pr
    216           0           1          0  0.00%  0.00%  0.00%   0 DATA Collector  
    217           0           1          0  0.00%  0.00%  0.00%   0 Async write proc
    218         116         292        397  0.00%  0.00%  0.00%   0 AAA SEND STOP EV
    219         136      171243          0  0.00%  0.00%  0.00%   0 RMON Recycle Pro
    220           0           2          0  0.00%  0.00%  0.00%   0 RMON Deferred Se
    221           0           1          0  0.00%  0.00%  0.00%   0 Syslog Traps    
    222           0           2          0  0.00%  0.00%  0.00%   0 EEM ED Resource 
    223           0           2          0  0.00%  0.00%  0.00%   0 EEM ED Routing  
    224           0           3          0  0.00%  0.00%  0.00%   0 EEM ED Track    
    225          80       53575          1  0.00%  0.00%  0.00%   0 Crypto cTCP proc
    226           0           1          0  0.00%  0.00%  0.00%   0 IP SLAs Ethernet
    227           4           1       4000  0.00%  0.00%  0.00%   0 RMON Packets    
    228         820     1709984          0  0.00%  0.00%  0.00%   0 trunk conditioni
    PID Runtime(ms)     Invoked      uSecs   5Sec   1Min   5Min TTY Process
    229           0           1          0  0.00%  0.00%  0.00%   0 trunk conditioni
    230          12         120        100  0.00%  0.00%  0.00%   0 EEM Server      
    231           4           2       2000  0.00%  0.00%  0.00%   0 Call Home proces
    232          52         260        200  0.00%  0.00%  0.00%   0 Syslog          
    233           0           1          0  0.00%  0.00%  0.00%   0 VPDN Test       
    234           0           2          0  0.00%  0.00%  0.00%   0 EEM Policy Direc
    235           0           2          0  0.00%  0.00%  0.00%   0 EEM ED CLI      
    236           0           3          0  0.00%  0.00%  0.00%   0 EEM ED Counter  
    237           0           3          0  0.00%  0.00%  0.00%   0 EM ED GOLD      
    238           0           3          0  0.00%  0.00%  0.00%   0 EEM ED Interface
    239           0           3          0  0.00%  0.00%  0.00%   0 EEM ED IOSWD    
    240           0           3          0  0.00%  0.00%  0.00%   0 EEM ED Ipsla    
    241           0           3          0  0.00%  0.00%  0.00%   0 EEM ED None     
    242           0           2          0  0.00%  0.00%  0.00%   0 EEM ED Nf       
    243           0           3          0  0.00%  0.00%  0.00%   0 EEM ED OIR      
    244           0           3          0  0.00%  0.00%  0.00%   0 EEM ED RF       
    245           0           3          0  0.00%  0.00%  0.00%   0 EEM ED SNMP     
    246           0           2          0  0.00%  0.00%  0.00%   0 EEM ED SNMP Noti
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    248           0           3          0  0.00%  0.00%  0.00%   0 EEM ED Test     
    249           0           3          0  0.00%  0.00%  0.00%   0 EEM ED Config   
    250           0           3          0  0.00%  0.00%  0.00%   0 EEM ED Env      
    251           0           3          0  0.00%  0.00%  0.00%   0 EEM ED RPC      
    252           0           2          0  0.00%  0.00%  0.00%   0 cpf_process_msg_
    253           0           1          0  0.00%  0.00%  0.00%   0 Key Proc        
    254          36       28543          1  0.00%  0.00%  0.00%   0 Call Home Timer 
    255           0           1          0  0.00%  0.00%  0.00%   0 tHUB            
    256           0           1          0  0.00%  0.00%  0.00%   0 Async write proc
    257         104         953        109  0.00%  0.00%  0.00%   0 SSH Event handle
    258          16       28543          0  0.00%  0.00%  0.00%   0 Secure Login    
    259          84          54       1555  0.00%  0.00%  0.00%   0 Tunnel Security 
    260          56          67        835  0.00%  0.00%  0.00%   0 Crypto SS Proces
    261           0           1          0  0.00%  0.00%  0.00%   0 cpf_process_tpQ 
    262           0           1          0  0.00%  0.00%  0.00%   0 TCP Listener    
    263           0           2          0  0.00%  0.00%  0.00%   0 IP Flow Top Talk
    264        1180     3338804          0  0.00%  0.00%  0.00%   0 IP NAT Ager     
    265           0           1          0  0.00%  0.00%  0.00%   0 IP NAT WLAN     
    266          24       28563          0  0.00%  0.00%  0.00%   0 IP SLAs Event Pr
    267      434504     1489526        291  0.00%  0.00%  0.00%   0 IP SNMP         
    268      170304      877961        193  0.00%  0.00%  0.00%   0 PDU DISPATCHER  
    269      495704      877992        564  0.00%  0.00%  0.00%   0 SNMP ENGINE     
    270           0           2          0  0.00%  0.00%  0.00%   0 IP SNMPV6       
    271           0           1          0  0.00%  0.00%  0.00%   0 SNMP ConfCopyPro
    272           0           1          0  0.00%  0.00%  0.00%   0 SNMP Traps      
    273     1185420     1715196        691  0.00%  0.00%  0.00%   0 NTP             
    274         412          29      14206  0.00%  0.00%  0.00%   0 VTEMPLATE Backgr
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    275       18608      174262        106  0.00%  0.00%  0.00%   0 BGP Router      
    276          36       27171          1  0.00%  0.00%  0.00%   0 DFS flush period
    277           8          12        666  0.00%  0.00%  0.00%   0 Collection proce
    278          16         651         24  0.00%  0.00%  0.00%   0 CRYPTO IKMP IPC 
    279        1724         850       2028  0.00%  0.00%  0.00%   2 SSH Process     
    281           0           1          0  0.00%  0.00%  0.00%   0 Skinny MOH Event
    282          64      173856          0  0.00%  0.00%  0.00%   0 Skinny Socket Se
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    ==============================================================
    wish to help ASAP

    JosephDoherty wrote:DisclaimerThe   Author of this posting offers the information contained within this   posting without consideration and with the reader's understanding that   there's no implied or expressed suitability or fitness for any purpose.   Information provided is for informational purposes only and should not   be construed as rendering professional advice of any kind. Usage of  this  posting's information is solely at reader's own risk.Liability DisclaimerIn   no event shall Author be liable for any damages whatsoever (including,   without limitation, damages for loss of use, data or profit) arising  out  of the use or inability to use the posting's information even if  Author  has been advised of the possibility of such damage.PostingThe fact you are matching with any ACLs, will decrease maximum performance.The fact you are using a policy-may, will decrease maximum performance.The fact is a -G2 only has finite capacity.In other words, what you're seeing might be completely normal for your traffic volume, your traffic composition and your configuration.If you believe your router is overloaded, and generally above 75% CPU might be so considered, either you'll need a faster device (see ASR 1Ks), or you might try changing your configuration to decrease your configuration load on the router.What's your CPU load if your remove the policy-map from the interface?If removing the policy-map from the interface shows a significant CPU loading decrease - QED.If you need/desire such QoS, then you'll want a "faster" router.You might be also able to decrease your CPU a little by some "tuning".  I already mention the TurboACL feature statement.  With ACLs, fewer are faster, and how they ordered (especially without TurboACL) impacts CPU.  How you order you class-maps, within a policy, and how the match statements are ordered will also have some impact on the CPU load.  If buffers are being allocated/deallocated, that too will impact CPU loading.  I assume CEF is enabled, but for some traffic, flow caching might decrease CPU load.Remember a software based router, like the 7200s, are, more or less, a computer that takes your configuration and determines what's to be done with every packet it "sees".  The more your configuration requires for per packet analysis, the more load for each packet.There are whitepapers addressing high CPU load caused by "process switching", but what you posted appears to be mostly all interrupt processing, which is "fast path", or optimal, packet forwarding.  There's not much you can normally do to improve against that, other than insuring your configuration is as optimal as possible for your needs (again, things like sequencing/ordering of statements).
    hi ,
    thanks very very much for this nice information,
    let me answer you :
    you said that NPE G2 has finite capacity , but how to know this full capacity ???
    i mean that my policy map is matching the traffic , but the matched traffic is not being enhancemend ??!!!
    last about two weeks , the matched traffic of youtube was excellent and no interrupt durting the my rush hour.
    i didnt change any thing, but my bw increased from 730 Mbps to 760Mbps ,
    im un able to make sure that i need to chnage my platform to faster one.
    agian
    my cpu is 60 % without QOS
    after QOS it increase to 80-85 %
    agian ,
    about NBAR
    i want to tell you that i cant depend on NBAR , as an example , im matching the ips of videos of facebook , i cant depend on NBAR because it is https videos.
    but in summary ,
    my qos is matching well , but i have no real enhancement for my traffic.
    did you face my issue before  ???
    i mean have you see like my problem ?
    like my router platform  with cpu over 80 % and 750Mbps , and matched qos without good result ??
    note that i upgraded to iso 15 , but seems same issue !!!
    regards

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    ~
    ~
    . . .  I guess I will have it triaged next week when our team returns. Please hold until then.
    ~
    ~
    ==
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     drivers/hv/hv_balloon.c |   20 +++-----------------
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    ==
    +
    ==
    > On 07/24/2013 02:29 PM, K. Y. Srinivasan wrote:
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    > > -   * proceed even if the pages in the hot added region
    > > -   * have not been "onlined" within the allowed time.
    > > +   * Before proceeding to hot add the next segment,
    > > +   * online the segment that has been hot added.
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    > > -  wait_for_completion_timeout(&dm_device.ol_waitevent,
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    Regards,
    K. Y
    ==
    ~
    ~
    ----- Original Message -----
    From: "Victor Miasnikov"
    To: "Dan Carpenter"; "K. Y. Srinivasan" ; <[email protected]>
    Cc: "Greg KH" ; <[email protected]>; <olaf (at) aepfle.de>; ""Andy Whitcroft"" <apw (at) canonical.com>;
    <jasowang (at) redhat.com>
    Sent: Thursday, January 09, 2014 2:18 PM
    Subject: RE: [PATCH 2/2] Drivers: hv: balloon: Online the hot-added memory "in context" Re: [PATCH 1/1] Drivers: hv:
    Implement the file copy service
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    Best regards, Victor Miasnikov
    Blog:  http://vvm.blog.tut.by/
    P.S.
    ==
     [PATCH 2/2] Drivers: hv: balloon: Online the hot-added memory "in context"
    ==
     What news?  Roadmap?

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