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4623 discussions

SIG reps syncing often
by Karanbir Singh 04 Feb '14

04 Feb '14

hi, >From the fosdem conversations.. it was clear that for cross SIG co-operation to work we are going to need to have a SIG's syncup every so often. And we could / should have something like : the CentOS Board is responsible for setting up and running a SIG's syncup once a month, with the SIG representatives optionally required to come themselves or nominate someone else ( again optionally ) to come along. This could be a hangout, a conf call ( go Voip SIG! ), or an irc chat. thoughts ? - KB -- Karanbir Singh +44-207-0999389 | http://www.karan.org/ | twitter.com/kbsingh GnuPG Key : http://www.karan.org/publickey.asc

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Kernel OOPS (NULL pointer) with incomplete sock structure?
by Andrew Smith 03 Feb '14

03 Feb '14

I'm debugging a problem that has appeared on a test rig here and I'm wondering if anybody could shed any additional insight into what might be happening. I have a rig running on VMWare ESXi 5.5 with 12 4 Core CentOS 6.4 shipping approximately 100MB/second across the network and within an hour usually one of the nodes fails with a trap as follows. <7>out of order segment: rcv_next 3F89F4D seq AF008380 - A5BE3000 <1>BUG: unable to handle kernel NULL pointer dereference at 00000000000000b0 <1>IP: [<ffffffff8148fd63>] skb_set_owner_r+0x53/0x70 <4>PGD 13ba5a067 PUD 13cec4067 PMD 0 <4>Oops: 0000 [#1] SMP <4>last sysfs file: /sys/module/ip_tables/initstate <4>CPU 0 <4>Modules linked in: iptable_mangle ipv6 ipt_REJECT nf_conntrack_ipv4 nf_defrag_ipv4 xt_state nf_conntrack iptable_filter ip_tables ppdev parport_pc parport vmxnet(U) vmware_balloon vmci(U) i2c_piix4 i2c_core sg shpchp ext4 mbcache jbd2 sd_mod crc_t10dif sr_mod cdrom vmw_pvscsi pata_acpi ata_generic ata_piix dm_mirror dm_region_hash dm_log dm_mod [last unloaded: scsi_wait_scan] <4> <4>Pid: 1329, comm: java Not tainted 2.6.32-358.11.1.el6.x86_64 #1 VMware, Inc. VMware Virtual Platform/440BX Desktop Reference Platform <4>RIP: 0010:[<ffffffff8148fd63>] [<ffffffff8148fd63>] skb_set_owner_r+0x53/0x70 <4>RSP: 0000:ffff880028203a30 EFLAGS: 00010206 <4>RAX: 0000000000000000 RBX: ffff8800a405f780 RCX: 0000000000000000 <4>RDX: 0000000000000ab4 RSI: ffff8800a405f780 RDI: ffff8800a405f780 <4>RBP: ffff880028203a40 R08: 00000000000126a8 R09: 00000000fffffff7 <4>R10: 0000000000000007 R11: 000000000000000a R12: ffff8800a405f780 <4>R13: ffff8800a405f780 R14: ffff8800a405fd00 R15: 0000000000000002 <4>FS: 00007ff42d0d0700(0000) GS:ffff880028200000(0000) knlGS:0000000000000000 <4>CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 <4>CR2: 00000000000000b0 CR3: 000000013c441000 CR4: 00000000000006f0 <4>DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 <4>DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 <4>Process java (pid: 1329, threadinfo ffff8800a5596000, task ffff880139c94080) <4>Stack: <4> ffff8800a405f780 ffff8800a405f780 ffff880028203a60 ffffffff814950f2 <4><d> ffff8800a405f780 0000000000000004 ffff880028203a80 ffffffff8143d38e <4><d> 0000000000000000 ffff8800af008380 ffff880028203b50 ffffffff81496dd4 <4>Call Trace: <4> <IRQ> <4> [<ffffffff814950f2>] tcp_data_queue+0x432/0xc70 <4> [<ffffffff8143d38e>] __kfree_skb+0x1e/0xa0 <4> [<ffffffff81496dd4>] tcp_ack+0x3b4/0x12c0 <4> [<ffffffffa01810d5>] ? ipt_do_table+0x295/0x678 [ip_tables] The trap seems consistent across several (although always CentOS) Kernel revisions including 2.6.32.431.3.1 shipped with 6.5 and manifests in the same way with the following combinations.. 1. 2.6.32.385 Kernels from 6.4 and Open VM tools RPM from VMWare package feed. 2. 2.6.32.385 Kernels from 6.4 with Open VM Tools with modules built for the Kernel. 3. 2.6.32.431.3.1 Kernel from 6.5 using vmxnet3 drivers included in the Kernel. Tracing skb_set_owner I isolated the failing operation to an inline function in sock.h which seems to be present in current Linux 3.x Kernels also. static inline int sk_has_account(struct sock *sk) { /* return true if protocol supports memory accounting */ return !!sk->sk_prot->memory_allocated; } The faulting instruction actually being the bottom one here.. /usr/src/debug/kernel-2.6.32-358.11.1.el6/linux-2.6.32-358.11.1.el6.x86_64/include/net/sock.h: 970 0xffffffff8148fd58 <skb_set_owner_r+72>: mov 0x30(%r12),%rax /usr/src/debug/kernel-2.6.32-358.11.1.el6/linux-2.6.32-358.11.1.el6.x86_64/include/net/sock.h: 1515 0xffffffff8148fd5d <skb_set_owner_r+77>: mov 0xe0(%rbx),%edx /usr/src/debug/kernel-2.6.32-358.11.1.el6/linux-2.6.32-358.11.1.el6.x86_64/include/net/sock.h: 1007 0xffffffff8148fd63 <skb_set_owner_r+83>: cmpq $0x0,0xb0(%rax) And dumping the particular sock structure reveals the problem to be that the sk->sk_prot pointer (actually that's a define pointing to __sk_common.skc_prot) to be NULL. crash> *sock 0xffff8800a405f7B0 struct sock { __sk_common = { { skc_node = { next = 0x0, pprev = 0x0 }, skc_nulls_node = { next = 0x0, pprev = 0x0 } }, skc_refcnt = { counter = 0 }, skc_hash = 0, skc_family = 0, skc_state = 0 '\000', skc_reuse = 0 '\000', skc_bound_dev_if = 0, skc_bind_node = { next = 0xcd498725cd498171, pprev = 0x1803f8a043 }, skc_prot = 0x0, skc_net = 0x5b4000005b4 }, I'm somewhat baffled as to how a structure like this can occur since the socket when constructed, either for listening or for connecting, should have skc_prot pointed to an appropriate handler and this would seem to obviate the need to additionally protect the check in sk_has_account by checking the skc_prot pointer first. I was wondering if anybody has seen anything similar or can suggest how a sock can end up in a state without skc_prot populated. Regards, Andy

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Re: [CentOS-devel] CentOS 7 Artwork
by Tuomas Kuosmanen 02 Feb '14

02 Feb '14

On Wed, 2014-01-15 at 10:54 +0100, Marcus Moeller wrote: > Hi all. > > Here is my proposal artwork for the upcoming CentOS 7 release. Nice! Marcus, I wanted to share this: The stars picture reminds me of this one I did: https://dl.dropboxusercontent.com/u/2730444/foss/spaceflight.png Pretty nice co-incidence and a common theme we had by accident! =) This was one of the ideas I had while I was helping the guys with the website. (I subscribed after Karanbir showed me your mail in the archives, sorry if I messed up the mail thread headers) /Tuomas

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FreeIPA functional testing
by James Hogarth 01 Feb '14

01 Feb '14

Hi all, The initial commit I made (not carried out pull request just yet) does the following: * Installs IPA packages * Does automated basic configuration of server * Verifies kerberos tickets being issued for host/admin user * Tests adding a user (and checks that the initial password is expired plus the change) In the next few days I'm intending to add: * Test adding a service and getting a keytab and certificate for that service * Test adding a host * Test adding DNS zone and records * Test reloading bind (regression test for RHBA-2013-0739) * Test sudo rules configured via IPA * Test deleting all the stuff added above After that I'll issue the pull request... Next stage subsequent to the server tests working would be client side to tests registration against the IPA server itself... Is there anything else that anyone can think of that would be useful to have in the IPA test suite? Cheers, James

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CentOS Interoperability SIG
by Clint Savage 29 Jan '14

29 Jan '14

One of the major values of the EL rebuild ecosystem is the ability to interoperate, or the ability to fork from the upstream. This provides purpose in many ways, choice being the most heralded. Since the CentOS community has teamed up with Red Hat to allow for Special Interest Groups to join them, it seems that there might be a bit less of an ecosystem available. The goal of the Interoperability SIG is to ensure that the ability to fork and rebuild still exist. Our communities already exist outside of the CentOS community purview. They are currently the GoOSe Project[1] and the Ascendos Project[2]. This shared community will serve as a "reference implementation", yet will still be operated and marketed as a product and community separate from CentOS. Consider it something of CentOS "embassy" of sorts. It would seem that this SIG could be construed as contrary to the goals of the CentOS project. However, we believe there is value added to the CentOS project. We are interested in improving the CentOS community in at least a few ways. * Providing feedback and collaboration on common issues. Including, but not limited to, reporting bugs, providing patches, discussing packaging techniques, rebuilding variants, QA, ISO building, etc. * Collaboration on documentation of the rebuild process, rebranding of documentation, providing new documentation, etc. * Build or maintain tools to ease rebranding of upstream packages as to ease adoption by companies who build upon and release software based on CentOS. * Providing tools to help monitor statuses of builds, repositories, releases, etc. Whether they be part of the CentOS community or otherwise. With these goals in mind, we'd like to formally request an Interoperability Special Interest Group within the CentOS community. Please let us know how to further proceed. Cheers, Clint Savage Lead Developer, GoOSe project 1 - http://gooseproject.org (#gooseproject on irc.freenode.net) 2 - http://ascendos.org (#ascendos on irc.freenode.net)

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Wider conversation around process and delivery for the Cloud SIG
by Karanbir Singh 29 Jan '14

29 Jan '14

hi, I'd like to invite everyone wanting to contribute to the Cloud SIG and representing a project outside centos.org to come along for a chat on google hangout at the CentOS OfficeHours 23rd Jan 2014 @ 16:00 UTC. Because we only have a few slots for people to talk, I've shortlisted these folks: OpenStack: Mike Burns, Dave Neary, Rich Bowen Eucalyptus: Greg DK OpenNebula: Jaime Melis CloudStack: Sebastien Goasguen oVirt: Doron Fediuck If you want to be on this list, please get in touch. If you are on this list but cant make it at that date/time, please nominate someone else in your place and let me know their email address so I can notify them of the url to join. This will be a video/audio session and will be publicly broadcast over youtube/hangouts on air; the recording of the session will be available immediately after. Bonus cookies for everyone who turns up in their project tshirts! You can see what time that is on your local timezone at this url : http://www.timeanddate.com/worldclock/fixedtime.html?iso=20140123T16&am=30 About the session: - Plan on an hour - Every project should do a few minutes worth of a pitch about what they would like to see as a good first goal and a good longer term goal. - We can then discuss delivery mechanis, and how the forward maintenance of the projects payload is going to work ( essentially, workout how the rpms will map to os/ and updates/ ) - Consider the workflow from git.centos.org ( KB to do a 5 min demo ) Regards, -- Karanbir Singh +44-207-0999389 | http://www.karan.org/ | twitter.com/kbsingh GnuPG Key : http://www.karan.org/publickey.asc

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Chromium
by Logan McNaughton 29 Jan '14

29 Jan '14

This is just a ping for whoever manages http://people.centos.org/hughesjr/chromium/6, wondering if you could update to Chromium 32?

4 3

mirrors for contribution paths
by Karanbir Singh 29 Jan '14

29 Jan '14

hi At the moment, we use gitorious.org for inbounc test contributions, but we've adopted github for some of the newer content going into git.centos.org with manual bridges to/from git.centos.org in both cases. I just want to make sure we are doing what people find easiest, and then we do the same thing all around, with that in mind should we : - have mirrors for content on both github.com and gitorious.org - mirror everything to gitorious.org only - mirror everything to github.com only ofcourse, with ACL's coming up into git.centos.org - there will be plenty of opportunity to work directly inside git.centos.org ( with post-recv triggers pushing to whatever wherever we mirror the repos to ). - KB -- Karanbir Singh +44-207-0999389 | http://www.karan.org/ | twitter.com/kbsingh GnuPG Key : http://www.karan.org/publickey.asc

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migrating artwork to git.centos.org
by Jim Perrin 29 Jan '14

29 Jan '14

So, running this by the list for opinions: We're going to be moving the Artwork SIG from its current home at https://projects.centos.org/trac/artwork/ (svn) to a new home on git.centos.org. In this transition, we'd like to clean up some of the older content that's no longer used. The easy way to do this would be to pull current svn repo, strip out the legacy content, and then upload clean into git. While this is my preference, the drawback is that it removes any commit history for the project prior to the cutover date. The benefit is we have a clean, and more importantly, current starting point to work from for the seven beta build, which we'd like to start putting out in public. Are there objections to this approach? -- Jim Perrin The CentOS Project | http://www.centos.org twitter: @BitIntegrity | GPG Key: FA09AD77

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Cloud-init for CentOS?
by Nux! 28 Jan '14

28 Jan '14

Hello, Can someone more involved with the Cloud SIG advise on how to use cloud-init in such a way that it does not violate the SIG rules? I.e. please add it to one of the CentOS repos so we can use it "legally". :-) The purpose is including it in "official" Cloudstack CentOS images. Regards, Lucian -- Sent from the Delta quadrant using Borg technology! Nux! www.nux.ro

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