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18 participants
4604 discussions

NX : centos-extras versus EPEL
by Akemi Yagi 02 Mar '14

02 Mar '14

I know a number of people have been using the nx/freenx packages available from the centos-extras repo. Now, EPEL recently started distributing NX packages. When you run 'yum update' with epel enabled, it will replace CentOS' nx as seen here: http://pastebin.centos.org/8101/ Have any of you tried EPEL's version? If so, can you share your findings? The open-source edition of NX (version 3.5.x) is virtually static because there would not be updates from NoMachine. I don't know if EPEL made any changes/additions to what CentOS offers. Akemi

5 4

Is it possible to merge elrepo.org contribute to centos main repository?
by zf＠ancientrocklab.com 28 Feb '14

28 Feb '14

Hello, every one. Is it possible to merge elrepo.org contribute to centos main repository?elrepo.org contribute the latest hardware driver and latest kernel for centos.Using it for a longtime, just want to know if it possible to got it merged to centos main repository. What we expected? The latest kernel cotains more optimizer for filesystem driver. such as XFS. zf(a)ancientrocklab.com

16 56

Russian localized Freenode.net channel #centos-ru
by Мернов Георгий 26 Feb '14

26 Feb '14

Didn't receive an answer for my mail, trying to send it again. Hi, i would like to start a Cyrillic UTF-8 community channel on a Freenode. Can you assist me in ? -- С Уважением Мернов Георгий

3 15

Invitation to propose and mentor Xen - CentOS related GSoC projects
by Lars Kurth 26 Feb '14

26 Feb '14

Hi, the Xen Project was accepted into GSoC this year. As distro integration is important, we are inviting Linux distributions to mentor and propose Xen related GSoC projects. Before you do so, * Please understand what we expect of students by reading http://wiki.xenproject.org/wiki/GSoc_2014#Finding_a_project_that_fits_you * What we expect of proposed projects and mentors by reading we http://wiki.xenproject.org/wiki/GSoc_2014#Conventions_for_Projects_and_Proj… You may need to request wiki write access before you can add a project : to get it go to http://xenproject.org/component/content/article/100-misc/145-request-to-be-… Regards Lars

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Where is the RHEL devtools-2.0 for CentOS?
by zf＠ancientrocklab.com 25 Feb '14

25 Feb '14

Where is the RHEL devtools-2.0 for CentOS? zf(a)ancientrocklab.com

1 0

GSoC & CentOS - not this year
by Karsten Wade 25 Feb '14

25 Feb '14

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Hi: We just got word that our application for Google Summer of Code for this year was not accepted. I'll admit to being not very surprised - I was counting on our recent changes toward a more open contributor project to make up for not having been able to do a lot of preparation for the application. We'll get this on our calendar for the next year so we're ahead of the curve. Part of that will be continuing to keep track of ideas as a community, get those on to a wiki page for 2015, and keep recruiting mentors. (I suspect our lack of a long list of ideas and mentors to be the biggest weakness in our application.) Thanks everyone for the help in rushing to get the application done in time - I think it was a pretty good application, maybe not strong enough. I also respect that the Google have a lot to keep balanced, it may have nothing to do with our shortcomings in the end. - - Karsten - -- Karsten 'quaid' Wade .^\ CentOS Doer of Stuff http://TheOpenSourceWay.org \ http://community.redhat.com @quaid (identi.ca/twitter/IRC) \v' gpg: AD0E0C41 -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 Comment: Using GnuPG with Thunderbird - http://www.enigmail.net/ iEYEARECAAYFAlMLlwsACgkQ2ZIOBq0ODEF+GQCgpnSazzbagfTMKB1K//GUU/25 aycAoIBbWMOVCpjwfkzLXmgNQWWP8z0f =VlwZ -----END PGP SIGNATURE-----

3 2

Storage SIG proposal
by Patrick McGarry 13 Feb '14

13 Feb '14

Greetings CentOS-devel, We here at Inktank (and the Ceph project) are quite interested in the direction that CentOS is headed and would love to propose a 'Storage SIG' to help ensure that something so fundamental gets the proper attention. There are definitely aspects that will overlap with Core, Cloud, and Virtualization, but we think there are plenty of places where storage should have it's own discourse. We are already building CentOS packages for Ceph and would like to encourage other storage offerings to do the same. We are definitely in alignment with the requirements and want to ensure that: 1) the discourse remains primarily CentOS related, or at least tangentially applicable. 2) there is plenty of feedback and control into, and out of, the core CentOS community. 3) all communications take place in public (either IRC or mailing lists). 4) all code is compatible with a FOSS license (in our case, LGPL v2 w/ fragmented copyright). 5) all documentation is compatible with the CentOS wiki license. 6) the storage SIG would be very mindful of CentOS direction and coordinate effectively. 7) we have the appropriate buy-in from the CentOS devteam. For a (very rough) outline of form and function I was thinking of the following. However, this will obviously grow and mature with feedback. Mission To ensure that CentOS is at the forefront of next generation storage technology and has a wide range of mature options for both traditional and distributed systems. Technical Goals * Assist with packaging and testing of storage technologies for CentOS repositories * Documenting paths to deployment and use for various storage technologies * Hold an open discourse around storage technology as it applies to CentOS * Work closely with providers of storage technology to ensure tight integration with CentOS Community Goals * Provide an easy-to-consume menu of storage and deployment/orchestration options * Act as a resource for those exploring next generation storage technology * Ensure that all storage technology is addressed equally without favoritism * Work with users to publish use cases and real-world examples for review I welcome any and all feedback and look forward to working with the CentOS community. Thanks. Best Regards, Patrick McGarry Director, Community || Inktank http://ceph.com || http://inktank.com @scuttlemonkey || @ceph || @inktank

4 8

irc bans for web gateway on #centos
by Karanbir Singh 12 Feb '14

12 Feb '14

hi guys, we seem to block all web gateways to the irc channel - is the aim to just block the freenode hosted one ? if so, can the ban be made mode specific to just that interface ? - KB -- Karanbir Singh +44-207-0999389 | http://www.karan.org/ | twitter.com/kbsingh GnuPG Key : http://www.karan.org/publickey.asc

3 4

eventfd to select problem between Intel and AMD
by lulin 12 Feb '14

12 Feb '14

Hi I met a strange problem, I wrote a simple program that create some eventfds and add it to select loop, create a thread to write some bytes to a random eventfd, when i run 100 instances on a Intel E5-2650, mpstat shows that we have 95% idle of CPU, but when i run same 100 instances on a AMD Opteron(TM) Processor 6272, mpstat shows 50% on sys, 50% idle. Kernel version is Linux 2.6.32-279.el6. The attachment is the source code of my test program. Can someone give any suggestion?? Thanks, :) Bellow is the environment: =============Intel E5-2650============================= processor: 31 vendor_id: GenuineIntel cpu family: 6 model: 45 model name: Intel(R) Xeon(R) CPU E5-2650 0 @ 2.00GHz stepping: 7 cpu MHz: 2000.149 cache size: 20480 KB physical id: 1 siblings: 16 core id: 7 cpu cores: 8 apicid: 47 initial apicid: 47 fpu: yes fpu_exception: yes cpuid level: 13 wp: yes flags: fpu vme de pse tsc msr pae mce cx8 apic mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx pdpe1gb rdtscp lm constant_tsc arch_perfmon pebs bts rep_good xtopology nonstop_tsc aperfmperf pni pclmulqdq dtes64 monitor ds_cpl vmx smx est tm2 ssse3 cx16 xtpr pdcm dca sse4_1 sse4_2 x2apic popcnt aes xsave avx lahf_lm ida arat epb xsaveopt pln pts dts tpr_shadow vnmi flexpriority ept vpid bogomips: 3999.44 clflush size: 64 cache_alignment: 64 address sizes: 46 bits physical, 48 bits virtual power management: [root@OVP ~]# mpstat 2 Linux 2.6.32-279.el6.x86_64 (OVP.com) 02/11/2014 _x86_64_(32 CPU) 08:57:40 PM CPU %usr %nice %sys %iowait %irq %soft %steal %guest %idle 08:57:42 PM all 0.24 0.00 0.24 0.00 0.00 0.00 0.00 0.02 99.50 08:57:44 PM all 0.00 0.00 0.19 0.00 0.00 0.00 0.00 0.10 99.71 08:57:46 PM all 0.19 0.00 0.29 0.00 0.00 0.00 0.00 0.02 99.50 08:57:48 PM all 0.34 0.00 0.29 0.00 0.00 0.02 0.00 0.32 99.02 ==================AMD Opteron(TM) Processor 6272========================= processor : 63 vendor_id : AuthenticAMD cpu family : 21 model : 1 model name : AMD Opteron(TM) Processor 6272 stepping : 2 cpu MHz : 2100.089 cache size : 2048 KB physical id : 3 siblings : 16 core id : 7 cpu cores : 8 apicid : 111 initial apicid : 111 fpu : yes fpu_exception : yes cpuid level : 13 wp : yes flags : fpu vme de pse tsc msr pae mce cx8 apic mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ht syscall nx mmxext fxsr_opt pdpe1gb rdtscp lm constant_tsc rep_good nonstop_tsc extd_apicid amd_dcm aperfmperf pni pclmulqdq monitor ssse3 cx16 sse4_1 sse4_2 popcnt aes xsave av x lahf_lm cmp_legacy svm extapic cr8_legacy abm sse4a misalignsse 3dnowprefetch osvw ibs xop skin it wdt lwp fma4 nodeid_msr topoext perfctr_core cpb npt lbrv svm_lock nrip_save tsc_scale vmcb_cl ean flushbyasid decodeassists pausefilter pfthreshold bogomips : 4199.79 TLB size : 1536 4K pages clflush size : 64 cache_alignment : 64 address sizes : 48 bits physical, 48 bits virtual power management: ts ttp tm 100mhzsteps hwpstate cpb amd TM 6272 09:43:11 PM CPU %usr %nice %sys %iowait %irq %soft %steal %guest %idle 09:43:12 AM all 2.42 0.00 53.37 0.00 0.00 0.03 0.00 0.43 43.74 09:43:13 AM all 2.91 0.00 55.37 0.00 0.00 0.02 0.00 0.14 41.55 09:43:14 AM all 2.34 0.00 55.60 0.00 0.00 0.02 0.00 0.19 41.85 09:43:15 AM all 3.81 0.00 55.32 0.00 0.00 0.02 0.00 0.16 40.69 09:43:16 AM all 2.63 0.00 54.53 0.00 0.00 0.02 0.00 0.13 42.70 09:43:17 AM all 2.47 0.00 55.60 0.00 0.00 0.03 0.00 0.18 41.72 09:43:18 AM all 2.50 0.00 55.64 0.00 0.00 0.02 0.00 0.18 41.67 09:43:19 AM all 3.34 0.00 54.61 0.00 0.00 0.02 0.00 0.22 41.81 09:43:20 AM all 2.39 0.00 55.21 0.00 0.00 0.02 0.00 0.18 42.20 09:43:21 AM all 2.83 0.00 53.78 0.00 0.00 0.02 0.00 0.34 43.03 09:43:22 AM all 2.63 0.00 53.96 0.00 0.00 0.02 0.00 0.24 43.15 ====Perf on AMD=====: - 25.64% [kernel] [k] fget_light - fget_light - 96.65% do_select core_sys_select sys_select system_call_fastpath - __select 99.98% __libc_start_main - 2.39% core_sys_select sys_select system_call_fastpath - __select 100.00% __libc_start_main - 15.88% [kernel] [k] _spin_lock_irqsave - _spin_lock_irqsave - 46.50% eventfd_poll do_select core_sys_select sys_select system_call_fastpath - __select 99.97% __libc_start_main + 26.00% add_wait_queue + 21.97% remove_wait_queue + 2.64% do_select + 1.32% __pollwait + 1.10% free_poll_entry + 9.89% [kernel] [k] _spin_unlock_irqrestore + 8.09% [kernel] [k] fput + 4.79% [kernel] [k] __pollwait + 3.64% [kernel] [k] do_select + 2.78% [kernel] [k] eventfd_poll + 2.16% [kernel] [k] list_del + 2.13% efd_test2 [.] main + 1.87% [kernel] [k] __list_add

1 0

/opt/rh is a directory and not a symbolic link when installing devtoolset
by Dave Johansen 11 Feb '14

11 Feb '14

I just installed devtoolset-1.1-gcc-c++ and devtoolset-1.1-gcc-plugin-devel on a clean install and after doing so /opt/rh was a directory and not a symbolic link to /opt/centos. It was an easy fix, but is there something I can do to help diagnose the cause of the issue so it won't bite other people? Thanks, Dave

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