Discuss March 2012

discuss@lists.centos.org

217 participants
198 discussions

iotop :: OSError: Netlink error: Invalid argument (22)
by Adrian Sevcenco 09 Mar '12

09 Mar '12

Hi! i have a problem with iotop : root@alien: ~ # iotop Traceback (most recent call last): File "/usr/bin/iotop", line 16, in ? main() File "/usr/lib/python2.4/site-packages/iotop/ui.py", line 567, in main main_loop() File "/usr/lib/python2.4/site-packages/iotop/ui.py", line 557, in <lambda> main_loop = lambda: run_iotop(options) File "/usr/lib/python2.4/site-packages/iotop/ui.py", line 465, in run_iotop return curses.wrapper(run_iotop_window, options) File "/usr/lib64/python2.4/curses/wrapper.py", line 44, in wrapper return func(stdscr, *args, **kwds) File "/usr/lib/python2.4/site-packages/iotop/ui.py", line 457, in run_iotop_window process_list = ProcessList(taskstats_connection, options) File "/usr/lib/python2.4/site-packages/iotop/data.py", line 375, in __init__ self.update_process_counts() File "/usr/lib/python2.4/site-packages/iotop/data.py", line 431, in update_process_counts stats = self.taskstats_connection.get_single_task_stats(thread) File "/usr/lib/python2.4/site-packages/iotop/data.py", line 158, in get_single_task_stats reply = self.connection.recv() File "/usr/lib/python2.4/site-packages/iotop/netlink.py", line 229, in recv raise err OSError: Netlink error: Invalid argument (22) CentOS release 5.5 (Final) iotop-0.4.3-4.el5 python-2.4.3-46.el5 anyone have any idea about this problem and how can i debug/fix it? Thanks! Adrian

4 3

php-pear problem on yum update
by Nikos Gatsis - Qbit 09 Mar '12

09 Mar '12

Hello list I have centos-release-5-7.el5.centos and today I noticed that there are some updates with yum. I try to update but something hapend with php-pear: file /usr/share/pear/.channels/__uri.reg from install of php-pear-1.4.9-8.el5.noarch conflicts with file from pa ckage php-pear-ole-0.5-2.el5.rf.noarch file /usr/share/pear/.channels/pear.php.net.reg from install of php-pear-1.4.9-8.el5.noarch conflicts with file from package php-pear-ole-0.5-2.el5.rf.noarch file /usr/share/pear/.channels/pecl.php.net.reg from install of php-pear-1.4.9-8.el5.noarch conflicts with file from package php-pear-ole-0.5-2.el5.rf.noarch file /usr/share/pear/.depdb from install of php-pear-1.4.9-8.el5.noarch conflicts with file from package php-pea r-ole-0.5-2.el5.rf.noarch file /usr/share/pear/.channels/__uri.reg from install of php-pear-1.4.9-8.el5.noarch conflicts with file from pa ckage php-pear-excel-0.9.0-1.el5.rf.noarch file /usr/share/pear/.channels/pear.php.net.reg from install of php-pear-1.4.9-8.el5.noarch conflicts with file from package php-pear-excel-0.9.0-1.el5.rf.noarch file /usr/share/pear/.channels/pecl.php.net.reg from install of php-pear-1.4.9-8.el5.noarch conflicts with file from package php-pear-excel-0.9.0-1.el5.rf.noarch file /usr/share/pear/.depdb from install of php-pear-1.4.9-8.el5.noarch conflicts with file from package php-pea r-excel-0.9.0-1.el5.rf.noarch file /usr/share/pear/.channels/__uri.reg from install of php-pear-1.4.9-8.el5.noarch conflicts with file from pa ckage php-pear-log-1.9.3-1.el5.rf.noarch file /usr/share/pear/.channels/pear.php.net.reg from install of php-pear-1.4.9-8.el5.noarch conflicts with file from package php-pear-log-1.9.3-1.el5.rf.noarch file /usr/share/pear/.channels/pecl.php.net.reg from install of php-pear-1.4.9-8.el5.noarch conflicts with file from package php-pear-log-1.9.3-1.el5.rf.noarch file /usr/share/pear/.depdb from install of php-pear-1.4.9-8.el5.noarch conflicts with file from package php-pea r-log-1.9.3-1.el5.rf.noarch file /usr/share/pear/.channels/__uri.reg from install of php-pear-1.4.9-8.el5.noarch conflicts with file from pa ckage php-pear-mail_mime-1.3.1-1.el5.rf.noarch file /usr/share/pear/.channels/pear.php.net.reg from install of php-pear-1.4.9-8.el5.noarch conflicts with file from package php-pear-mail_mime-1.3.1-1.el5.rf.noarch file /usr/share/pear/.channels/pecl.php.net.reg from install of php-pear-1.4.9-8.el5.noarch conflicts with file from package php-pear-mail_mime-1.3.1-1.el5.rf.noarch file /usr/share/pear/.depdb from install of php-pear-1.4.9-8.el5.noarch conflicts with file from package php-pea r-mail_mime-1.3.1-1.el5.rf.noarch I have never Install a package out of yum so this conflict is very strange to me. I try to clean up yum, and update with --skip-broken with no luck. Is good to install php packages excluding php-pear? Actually I dont use it. Can somebody advice me? Thank you in advance -- ------------------------------------------------------------------------ *Γατσής Νίκος - Gatsis Nikos* Web developer tel.: 2108256721 - 2108256722 fax: 2108256712 email: ngatsis(a)qbit.gr http://www.qbit.gr

4 3

HT (Hyper Threading) on CentOS 5.5
by Kaushal Shriyan 09 Mar '12

09 Mar '12

Hi, Do we need HT enabled on CentOS release 5.5 (Final) and Kernel Version :- 2.6.18-194.el5 Please help me understand the pros and cons of having HT enabled or disabled on the Server Dell R 710. cat /proc/cpuinfo -> http://fpaste.org/K2dT/ Do let me know if anyone needs more information. Regards, Kaushal

5 5

Re: [CentOS] HT (Hyper Threading) on CentOS 5.5
by Kaushal Shriyan 09 Mar '12

09 Mar '12

On Fri, Mar 9, 2012 at 1:35 PM, Sorin Srbu <sorin.srbu(a)orgfarm.uu.se> wrote: > -----Original Message----- > From: centos-bounces(a)centos.org [mailto:centos-bounces@centos.org] On > Behalf > Of John R Pierce > Sent: den 9 mars 2012 08:54 > To: centos(a)centos.org > Subject: Re: [CentOS] HT (Hyper Threading) on CentOS 5.5 > > On 03/08/12 11:44 PM, Sorin Srbu wrote: > > I know there might be some negative performance issues with certain > > applications, but would you notice it in day-to-day use? > Hi Pierce > if you're using the server for pure floating point compute, don't run > more threads than you have actual cores. Not sure i understand about your earlier comment regarding pure floating point compute, help me understand with some examples. Regards Kaushal

3 2

Re: [CentOS] HT (Hyper Threading) on CentOS 5.5
by John R Pierce 09 Mar '12

09 Mar '12

On 03/08/12 11:44 PM, Sorin Srbu wrote: > I know there might be some negative performance issues with certain > applications, but would you notice it in day-to-day use? if you're using the server for pure floating point compute, don't run more threads than you have actual cores. high concurrency server workloads that aren't IO bound generally benefit quite a lot from using hyperthreads to double the number of active workers. the HT on the X5600 and such newer Xeons is quite a lot better than the old netburst/p4 architecture where the benefits were marginal in many cases. -- john r pierce N 37, W 122 santa cruz ca mid-left coast

3 3

Running processes
by Robert Spangler 09 Mar '12

09 Mar '12

Hello, I was wondering if anyone could tell me why so many processes are started on my system? Here is a list of them. I am trying to figure out why they are running and if I can stop them. Thnx. USER PID %CPU %MEM VSZ RSS TTY STAT START TIME COMMAND root 2 0.0 0.0 0 0 ? S< 19:33 0:00 [migration/0] root 3 0.0 0.0 0 0 ? SN 19:33 0:00 [ksoftirqd/0] root 4 0.0 0.0 0 0 ? S< 19:33 0:00 [watchdog/0] root 5 0.0 0.0 0 0 ? S< 19:33 0:00 [migration/1] root 6 0.0 0.0 0 0 ? SN 19:33 0:00 [ksoftirqd/1] root 7 0.0 0.0 0 0 ? S< 19:33 0:00 [watchdog/1] root 8 0.0 0.0 0 0 ? S< 19:33 0:00 [migration/2] root 9 0.0 0.0 0 0 ? SN 19:33 0:00 [ksoftirqd/2] root 10 0.0 0.0 0 0 ? S< 19:33 0:00 [watchdog/2] root 11 0.0 0.0 0 0 ? S< 19:33 0:00 [migration/3] root 12 0.0 0.0 0 0 ? SN 19:33 0:00 [ksoftirqd/3] root 13 0.0 0.0 0 0 ? S< 19:33 0:00 [watchdog/3] root 14 0.0 0.0 0 0 ? S< 19:33 0:00 [migration/4] root 15 0.0 0.0 0 0 ? SN 19:33 0:00 [ksoftirqd/4] root 16 0.0 0.0 0 0 ? S< 19:33 0:00 [watchdog/4] root 17 0.0 0.0 0 0 ? S< 19:33 0:00 [migration/5] root 18 0.0 0.0 0 0 ? SN 19:33 0:00 [ksoftirqd/5] root 19 0.0 0.0 0 0 ? S< 19:33 0:00 [watchdog/5] root 20 0.0 0.0 0 0 ? S< 19:33 0:00 [migration/6] root 21 0.0 0.0 0 0 ? SN 19:33 0:00 [ksoftirqd/6] root 22 0.0 0.0 0 0 ? S< 19:33 0:00 [watchdog/6] root 23 0.0 0.0 0 0 ? S< 19:33 0:00 [migration/7] root 24 0.0 0.0 0 0 ? SN 19:33 0:00 [ksoftirqd/7] root 25 0.0 0.0 0 0 ? S< 19:33 0:00 [watchdog/7] root 26 0.0 0.0 0 0 ? S< 19:33 0:00 [events/0] root 27 0.0 0.0 0 0 ? S< 19:33 0:00 [events/1] root 28 0.0 0.0 0 0 ? S< 19:33 0:00 [events/2] root 29 0.0 0.0 0 0 ? S< 19:33 0:00 [events/3] root 30 0.0 0.0 0 0 ? S< 19:33 0:00 [events/4] root 31 0.0 0.0 0 0 ? S< 19:33 0:00 [events/5] root 32 0.0 0.0 0 0 ? S< 19:33 0:00 [events/6] root 33 0.0 0.0 0 0 ? S< 19:33 0:00 [events/7] root 34 0.0 0.0 0 0 ? S< 19:33 0:00 [khelper] root 107 0.0 0.0 0 0 ? S< 19:33 0:00 [kthread] root 118 0.0 0.0 0 0 ? S< 19:33 0:00 [kblockd/0] root 119 0.0 0.0 0 0 ? S< 19:33 0:00 [kblockd/1] root 120 0.0 0.0 0 0 ? S< 19:33 0:00 [kblockd/2] root 121 0.0 0.0 0 0 ? S< 19:33 0:00 [kblockd/3] root 122 0.0 0.0 0 0 ? S< 19:33 0:00 [kblockd/4] root 123 0.0 0.0 0 0 ? S< 19:33 0:00 [kblockd/5] root 124 0.0 0.0 0 0 ? S< 19:33 0:00 [kblockd/6] root 125 0.0 0.0 0 0 ? S< 19:33 0:00 [kblockd/7] root 126 0.0 0.0 0 0 ? S< 19:33 0:00 [kacpid] root 291 0.0 0.0 0 0 ? S< 19:33 0:00 [cqueue/0] root 292 0.0 0.0 0 0 ? S< 19:33 0:00 [cqueue/1] root 293 0.0 0.0 0 0 ? S< 19:33 0:00 [cqueue/2] root 294 0.0 0.0 0 0 ? S< 19:33 0:00 [cqueue/3] root 295 0.0 0.0 0 0 ? S< 19:33 0:00 [cqueue/4] root 296 0.0 0.0 0 0 ? S< 19:33 0:00 [cqueue/5] root 297 0.0 0.0 0 0 ? S< 19:33 0:00 [cqueue/6] root 298 0.0 0.0 0 0 ? S< 19:33 0:00 [cqueue/7] root 301 0.0 0.0 0 0 ? S< 19:33 0:00 [khubd] root 303 0.0 0.0 0 0 ? S< 19:33 0:00 [kseriod] root 387 0.0 0.0 0 0 ? S 19:33 0:00 [khungtaskd] root 388 0.0 0.0 0 0 ? S 19:33 0:00 [pdflush] root 389 0.0 0.0 0 0 ? S 19:33 0:00 [pdflush] root 390 0.0 0.0 0 0 ? S< 19:33 0:00 [kswapd0] root 391 0.0 0.0 0 0 ? S< 19:33 0:00 [aio/0] root 392 0.0 0.0 0 0 ? S< 19:33 0:00 [aio/1] root 393 0.0 0.0 0 0 ? S< 19:33 0:00 [aio/2] root 394 0.0 0.0 0 0 ? S< 19:33 0:00 [aio/3] root 395 0.0 0.0 0 0 ? S< 19:33 0:00 [aio/4] root 396 0.0 0.0 0 0 ? S< 19:33 0:00 [aio/5] root 397 0.0 0.0 0 0 ? S< 19:33 0:00 [aio/6] root 398 0.0 0.0 0 0 ? S< 19:33 0:00 [aio/7] root 548 0.0 0.0 0 0 ? S< 19:33 0:00 [kpsmoused] root 636 0.0 0.0 0 0 ? S< 19:33 0:00 [ata/0] root 637 0.0 0.0 0 0 ? S< 19:33 0:00 [ata/1] root 638 0.0 0.0 0 0 ? S< 19:33 0:00 [ata/2] root 639 0.0 0.0 0 0 ? S< 19:33 0:00 [ata/3] root 640 0.0 0.0 0 0 ? S< 19:33 0:00 [ata/4] root 641 0.0 0.0 0 0 ? S< 19:33 0:00 [ata/5] root 642 0.0 0.0 0 0 ? S< 19:33 0:00 [ata/6] root 643 0.0 0.0 0 0 ? S< 19:33 0:00 [ata/7] root 644 0.0 0.0 0 0 ? S< 19:33 0:00 [ata_aux] root 654 0.0 0.0 0 0 ? S< 19:33 0:00 [scsi_eh_0] root 655 0.0 0.0 0 0 ? S< 19:33 0:00 [scsi_eh_1] root 656 0.0 0.0 0 0 ? S< 19:33 0:00 [scsi_eh_2] root 657 0.0 0.0 0 0 ? S< 19:33 0:00 [scsi_eh_3] root 658 0.0 0.0 0 0 ? S< 19:33 0:00 [scsi_eh_4] root 659 0.0 0.0 0 0 ? S< 19:33 0:00 [scsi_eh_5] root 660 0.0 0.0 0 0 ? S< 19:33 0:00 [scsi_eh_6] root 661 0.0 0.0 0 0 ? S< 19:33 0:00 [scsi_eh_7] root 662 0.0 0.0 0 0 ? R< 19:33 0:00 [scsi_eh_8] root 663 0.0 0.0 0 0 ? S< 19:33 0:00 [scsi_eh_9] root 682 0.0 0.0 0 0 ? S< 19:33 0:00 [kstriped] root 721 0.0 0.0 0 0 ? S< 19:33 0:00 [md5_raid1] root 724 0.0 0.0 0 0 ? S< 19:33 0:00 [md6_raid1] root 727 0.0 0.0 0 0 ? S< 19:33 0:00 [md7_raid1] root 730 0.0 0.0 0 0 ? S< 19:33 0:00 [md9_raid1] root 733 0.0 0.0 0 0 ? S< 19:33 0:00 [md8_raid1] root 736 0.0 0.0 0 0 ? S< 19:33 0:00 [md4_raid1] root 739 0.0 0.0 0 0 ? S< 19:33 0:00 [md3_raid1] root 742 0.0 0.0 0 0 ? S< 19:33 0:00 [md2_raid1] root 745 0.0 0.0 0 0 ? S< 19:33 0:00 [md10_raid1] root 748 0.0 0.0 0 0 ? S< 19:33 0:00 [md11_raid1] root 751 0.0 0.0 0 0 ? S< 19:33 0:00 [md12_raid1] root 754 0.0 0.0 0 0 ? S< 19:33 0:00 [md1_raid1] root 757 0.0 0.0 0 0 ? S< 19:33 0:00 [md0_raid1] root 758 0.0 0.0 0 0 ? S< 19:33 0:00 [kjournald] root 789 0.0 0.0 0 0 ? S< 19:33 0:00 [kauditd] root 2062 0.0 0.0 0 0 ? S< 19:33 0:00 [hd-audio0] root 2100 0.0 0.0 0 0 ? S< 19:33 0:00 [hd-audio1] root 2805 0.0 0.0 0 0 ? S< 19:33 0:00 [kksmd] root 3074 0.0 0.0 0 0 ? S< 19:33 0:00 [kmpathd/0] root 3075 0.0 0.0 0 0 ? S< 19:33 0:00 [kmpathd/1] root 3076 0.0 0.0 0 0 ? S< 19:33 0:00 [kmpathd/2] root 3077 0.0 0.0 0 0 ? S< 19:33 0:00 [kmpathd/3] root 3078 0.0 0.0 0 0 ? S< 19:33 0:00 [kmpathd/4] root 3079 0.0 0.0 0 0 ? S< 19:33 0:00 [kmpathd/5] root 3080 0.0 0.0 0 0 ? S< 19:33 0:00 [kmpathd/6] root 3081 0.0 0.0 0 0 ? S< 19:33 0:00 [kmpathd/7] root 3082 0.0 0.0 0 0 ? S< 19:33 0:00 [kmpath_handlerd] root 3114 0.0 0.0 0 0 ? S< 19:34 0:00 [kjournald] root 3116 0.0 0.0 0 0 ? S< 19:34 0:00 [kjournald] root 3308 0.0 0.0 0 0 ? S< 19:34 0:00 [iscsi_eh] root 3416 0.0 0.0 0 0 ? S< 19:34 0:00 [cnic_wq] root 3427 0.0 0.0 0 0 ? S< 19:34 0:00 [bnx2i_thread/0] root 3430 0.0 0.0 0 0 ? S< 19:34 0:00 [bnx2i_thread/1] root 3431 0.0 0.0 0 0 ? S< 19:34 0:00 [bnx2i_thread/2] root 3432 0.0 0.0 0 0 ? S< 19:34 0:00 [bnx2i_thread/3] root 3433 0.0 0.0 0 0 ? S< 19:34 0:00 [bnx2i_thread/4] root 3434 0.0 0.0 0 0 ? S< 19:34 0:00 [bnx2i_thread/5] root 3435 0.0 0.0 0 0 ? S< 19:34 0:00 [bnx2i_thread/6] root 3436 0.0 0.0 0 0 ? S< 19:34 0:00 [bnx2i_thread/7] root 3459 0.0 0.0 0 0 ? S< 19:34 0:00 [ib_addr] root 3487 0.0 0.0 0 0 ? S< 19:34 0:00 [ib_mcast] root 3488 0.0 0.0 0 0 ? S< 19:34 0:00 [ib_inform] root 3489 0.0 0.0 0 0 ? S< 19:34 0:00 [local_sa] root 3499 0.0 0.0 0 0 ? S< 19:34 0:00 [iw_cm_wq] root 3510 0.0 0.0 0 0 ? S< 19:34 0:00 [ib_cm/0] root 3511 0.0 0.0 0 0 ? S< 19:34 0:00 [ib_cm/1] root 3512 0.0 0.0 0 0 ? S< 19:34 0:00 [ib_cm/2] root 3513 0.0 0.0 0 0 ? S< 19:34 0:00 [ib_cm/3] root 3514 0.0 0.0 0 0 ? S< 19:34 0:00 [ib_cm/4] root 3515 0.0 0.0 0 0 ? S< 19:34 0:00 [ib_cm/5] root 3516 0.0 0.0 0 0 ? S< 19:34 0:00 [ib_cm/6] root 3517 0.0 0.0 0 0 ? S< 19:34 0:00 [ib_cm/7] root 3527 0.0 0.0 0 0 ? S< 19:34 0:00 [rdma_cm] root 4236 0.0 0.0 0 0 ? S< 19:34 0:00 [kondemand/0] root 4237 0.0 0.0 0 0 ? S< 19:34 0:00 [kondemand/1] root 4238 0.0 0.0 0 0 ? S< 19:34 0:00 [kondemand/2] root 4239 0.0 0.0 0 0 ? S< 19:34 0:00 [kondemand/3] root 4240 0.0 0.0 0 0 ? S< 19:34 0:00 [kondemand/4] root 4241 0.0 0.0 0 0 ? S< 19:34 0:00 [kondemand/5] root 4242 0.0 0.0 0 0 ? S< 19:34 0:00 [kondemand/6] root 4243 0.0 0.0 0 0 ? S< 19:34 0:00 [kondemand/7] root 4344 0.0 0.0 0 0 ? S< 19:34 0:00 [rpciod/0] root 4345 0.0 0.0 0 0 ? S< 19:34 0:00 [rpciod/1] root 4346 0.0 0.0 0 0 ? S< 19:34 0:00 [rpciod/2] root 4347 0.0 0.0 0 0 ? S< 19:34 0:00 [rpciod/3] root 4348 0.0 0.0 0 0 ? S< 19:34 0:00 [rpciod/4] root 4349 0.0 0.0 0 0 ? S< 19:34 0:00 [rpciod/5] root 4350 0.0 0.0 0 0 ? S< 19:34 0:00 [rpciod/6] root 4351 0.0 0.0 0 0 ? S< 19:34 0:00 [rpciod/7] -- Regards Robert Linux The adventure of a lifetime. Linux User #296285 Get Counted http://linuxcounter.net/

3 3

Fetchmail warning
by Timothy Murphy 09 Mar '12

09 Mar '12

I fetchmail on my CentOS-6.2 from 4 servers. One always gives the warning ----------------------------- [tim@grover cron.d]$ fetchmail -a go.tcd.ie fetchmail: Error exchanging credentials 6 messages for tmurphy at go.tcd.ie. reading message tmurphy@go.tcd.ie:1 of 6 (2978 header octets) (2639 body octets) flushed ... ----------------------------- The messages seem to come over OK, so it seems the warning doesn't matter. Or does it? I don't get the warning from other IMAP servers. But I was wondering if my setup in /etc/pki/tls/certs/ is correct. I have 3 .crt files: ca-bundle.crt from CentOS installation (actually from ca-certificates*.rpm), gayleard.crt , the certificate I got from CAcert.org cacert.crt , the Class 3 root certificate from CAcert.org . I'm wondering if I am supposed to append the cacert.crt to ca-bundle.crt , and if failure to do that could be the cause of the warning? Alternatively, should I use the Class 1 root certificate from CAcert? (I didn't because CAcert said this was for Windows.) Finally, can anyone kindly point me to an online article that would answer the queries above? -- Timothy Murphy e-mail: gayleard /at/ eircom.net tel: +353-86-2336090, +353-1-2842366 s-mail: School of Mathematics, Trinity College Dublin

1 0

Difference between 'cr' and ' fasttrack'
by Ross Walker 08 Mar '12

08 Mar '12

I see the two distribution points for each release, they seem very alike, what is the difference? -Ross

2 2

md raid 10
by William Warren 08 Mar '12

08 Mar '12

why will Centos 6 not boot from an mdraid 10 partition?

10 33

Re: [CentOS] CentOS 5.8 update
by Paul Heinlein 08 Mar '12

08 Mar '12

On Thu, 8 Mar 2012, Sorin Srbu wrote: > Another smooth update. Thanks CentOS-team! +1 I'll note that I didn't start the updates until earlier this morning, so I went straight to the 2.6.18-308.1.1.el5 kernel. -- Paul Heinlein heinlein(a)madboa.com 45°38' N, 122°6' W

1 0

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Discuss March 2012