1
vote
3answers
302 views

Error installing new OpenVZ kernel

Seem to have an error when updating the kernel on a OpenVZ server when running "yum update" im getting the below Loaded plugins: fastestmirror Loading mirror speeds from cached hostfile * base: ...
1
vote
1answer
102 views

CentOS only detecting 50% of ram on IBM Server

I have IBM server with 16 GB RAM installed. Initially it showed 16 GB with free | grep Mem | awk '{print $2}' but now it shows only 8116136 but it must show 16439208 When I do dmidecode ...
1
vote
1answer
105 views

Server won't boot, kernel panic - not syncing

After a reboot of a CentOS 6.2 server we are getting a kernel panic with the following error: Kernel panic - not syncing: Attempted to kill init! Panic occurred, switching back to text console ...
2
votes
0answers
78 views

Linux cgroups cpuset w/ subs causes cgconfig not to start

I am having a problem trying to separate 2 groups using cpuset subsystem. This works fine, however if i go to add a subgroup to that group (in this case -- user1), cgconfig will fail to start with ...
1
vote
1answer
108 views

bad page map bug during snapshot

I ran the following command to create a snapshot volume. But the kernel received a bug and the kvm hypervisor stopped responding. Why is the error and how to fix it? lvcreate -L20G -s -n ...
3
votes
1answer
2k views

Centos 6.5 crashing with kernel panics

I recently built a small cluster for running Solr. The cluster consists of 12 Supermicro Blades running E3-1270V2 with 32GB of ram. 11 of these servers are running fine. One of them crashes on me ...
0
votes
2answers
273 views

Server shutting down for no reason, kernel errors. Please advice [closed]

My server has being shutting down by itself for the last 3 days after a power related problem. It's a KVM virtual machine. It stays on for no longer than about 20 minutes then it turns off. Note that ...
1
vote
2answers
623 views

How to remove old kernels on CentOS 6 (to free up boot partition)? [duplicate]

How does one determine which kernels to remove in order to free up some space on /boot partition. Here is a scenario (some background info). 1. Parititon info (in case it helps) # df -h Filesystem ...
0
votes
0answers
52 views

Not seeing kernel messages in syslog

I'm trying to track down a process that kills my mysql server on my CentOS box. I have the following setting in /etc/syslog.conf: *.*;mail.none;authpriv.none;cron.none /var/log/messages I ...
2
votes
2answers
499 views

Multiple NIC arp issue

I'm troubleshooting an issue on Centos 6.4. I have a few systems setting up for greenplum. Each one has two "interconnect" interfaces connecting to an isolated subnet. It is like a cluster ...
3
votes
1answer
58 views

Avoid recompiling kernel modules when updating a kernel package

I currently maintain a bunch of kernel modules on my CentOS-6-like system. Suppose I want to recompile the same kernel version (Currently 3.4.56-1) to enable CONFIG_VM_EVENT_COUNTERS (or another ...
2
votes
1answer
72 views

How to tell which device in /dev a kernel module added?

I have just compiled the QLogic qla2xxx FC driver on a CentOS6.4 host, and done echo 'alias scsi_hostadapter qla2xxx' >> /etc/modprobe.d/modprobe.conf cd /boot cp initramfs-$(uname -r).img ...
0
votes
0answers
256 views

module scsi_wait_scan not found boot kernel panic after kernel update

I got troubles booting after kernel update: After upgrading kernel 3.10.4-1 to 3.10.5-1 or 3.10.6-1 the system is refusing to boot with module scsi_wait_scan not found error message. Then comes ...
1
vote
1answer
634 views

What does this kernel error mean and how should I respond?

The following except is taken from the logwatch of a production LAMP web server I'm about to inherit. It is a dedicated Dell server running CentOS 5 with RAID 1 across two 1TB drives. I have little ...
1
vote
2answers
259 views

Increase FD limitation then SSH not working?

I'm using CentOS 6.3 64bit, and having trouble with increase FD limitation: SSH not working after changed the limitation, every-times I logged on my server, after typed password, then "connection ...
4
votes
3answers
625 views

Compiling kernel version >= 2.6.34 on CentOS 5: RAID set “ddf1_foo” was not activated?

I want to mount a Ceph FS on some CentOS 5 servers. Since the ceph-fuse failed with below errors: # ceph-fuse --no-fuse-big-writes -m 192.168.2.15:6789 /mnt/ceph/ ceph-fuse[7528]: starting ceph ...
2
votes
3answers
4k views

CentOS 6: strange page allocation failure messages [duplicate]

I set up a new Server with CentOS 6.4 final as successor for an old mysql server and I'm facing some problems with it. From time to time mysql connections are being disconnected. Furthermore the ...
0
votes
2answers
2k views

CentOS 6 Xen guest fails to boot after 'yum update'. Kernel?

I Seem to be having an issue with a Xen guest not booting after a yum update. DomU Configuration: #kernel = '/boot/solus-vmlinuz' #ramdisk = '/boot/solus-initrd.img' bootloader = ...
2
votes
2answers
1k views

How to differentiate intentional reboot and power failure from logs

One of my centos host rebooted recently unfortunately no monitoring was implemented . How can i find out what caused it to reboot. i only have ssh access to it. How can determine if the cause is due ...
-1
votes
2answers
855 views

Why does Centos 6 have an older kernel than Ubuntu 12.04 [closed]

Hi can some one help me in understanding this. On Centos 6.2 its showing kernel as 2.6.32-220.el6.x86_64 whereas on Ubuntu 12.04 its showing as 3.2.0-23-generic. 3.0 kernel is one of the latest ...
1
vote
1answer
76 views

saving loaded kernel modules

I did the following in command line: modprobe ipt_LOG modprobe ipt_multiport modprobe ipt_state modprobe ipt_limit modprobe ipt_recent modprobe ipt_owner modprobe iptable_nat modprobe tun/tap ...
0
votes
0answers
49 views

enabling modules for a kernel

I have a KVM/XEN VPS and would like to enable the following modules: ipt_LOG ipt_multiport ipt_state ipt_limit ipt_recent ipt_owner iptable_nat tun/tap iptable_nat ipt_MASQUERADE ipt_POSTROUTING PPTP ...
-3
votes
2answers
387 views

random server reboots [closed]

Jan 6 22:43:27 HOSTkernel: [34400.406538] Firewall: *Port Flood* IN=eth0 OUT= MAC=00:25:90:33:2c:d4:00:12:7f:34:7d:bf:08:00 SRC=141.0.9.77 DST=SERVER IP LEN=60 TOS=0x00 PREC=0x00 TTL=59 ID=2055 DF ...
1
vote
2answers
446 views

Server freezes and suddenly load going very high

I'm on CentOS 5.7 and I get server freezes quite a lot and the logs show the following output: Dec 26 18:33:51 server kernel: "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this ...
3
votes
1answer
1k views

HPET missing from available clocksources on CentOS

I am having trouble using HPET on my physical machine. It is not available, even though I have enabled it in my bios, forced it in grub, and triple checked my kernel to include HPET in its ...
5
votes
4answers
19k views

In CentOS 6.x, how can I upgrade to Kernel 3.4?

I have a server with CentOS 6.2 with kernel version 2.6.32, but I need to increase my application Performance. The Kernel Version 3.4 has x32abi which can improve the performance so i want to upgrade ...
1
vote
3answers
752 views

Ext4 kernel panic

I'm getting such kernel panics: EXT4-fs error (device md2): ext4_ext_find_extent: bad header/extent in inode #97911179: invalid magic - magic 5f69, entries 28769, max 26988(0), depth 24939(0) ...
0
votes
1answer
834 views

drivers/rtc/hctosys.c: unable to open rtc device (rtc0) after recompile on boot

After recompiling a new kernel on CentOS 6.3, using the same kernel I have been using on several other machines, I am getting a kernel panic on two machines. I get the following when trying to boot: ...
0
votes
1answer
444 views

Issue with kernel boot [OVH SERVER]

Trying to install OpenVZ kernel on Centos 6.3, Yes my kernel is installed i can see it in the /boot folder, yes it is Rhel6 and yes it is all up to date, i checked this with yum update. My issue ...
1
vote
2answers
389 views

yum update kernel without removing old?

When I yum update it wants to remove the oldest of the 3 kernel I have and upgrade to a new. Is it possible to get yum not to remove old kernels?
0
votes
0answers
584 views

XEN Domain crash - kernel panic

I have a server with CentOS 5.8.Final, running the 2.6.18-308.4.1.el5xen kernel. I installed the Virtualizorpanel 2 months ago and my VPS are OK, but yesterday one of my VPS crashed. I changed theRAM ...
1
vote
1answer
465 views

Netconsole not working

I've gotten netconsole setup on a server that's been having a variety of kernel panics lately and I'm trying to log kernel messages to another server. I've tested netconsole after setting it up on the ...
-3
votes
1answer
396 views

Centos 6 ISO with custom kernel

I need to build a Centos ISO with a 3.2 Kernel to setup a new server, how I can do this? The server has a Raid Controller that's not supported in previous Kernel Versions, which means I can not ...
3
votes
1answer
571 views

Kernel appears to have no modules

Useful info: OS: CentOS 5.8 final Kernel: 2.6.32-042stab056.8 My kernel came prebuilt with the server, I don't know anything about kernels and not a lot about linux however as far as I do know I ...
1
vote
2answers
2k views

server running out of memory

the server is running out of memory and get to the point where it starts killing the process, the total PSS memory(actual memory used from the Resident memory) consumed by top using applications is ...
2
votes
1answer
3k views

What is oom-kiler and why is it happening ? Should I avoid it?

I have a server that is now having "invoked oom-killer" many times a day ! I never saw that and even after reading tons of forums on Internet I'm still puzzled : is it a big problem ? Why is it ...
1
vote
0answers
154 views

Find counts of ulimit quotas

So, we may have some sort of zainy leak in our software. We're using Mono and spawning many processes over the course of weeks/months. Eventually, we can't spawn anymore on our clients machines. It ...
2
votes
2answers
330 views

named gets killed

Every once in a while, my server will kill named. This gets logged: Apr 16 17:00:08 li127-203 kernel: Out of memory: Kill process 15723 (named) score 38 or sacrifice child Apr 16 17:00:08 li127-203 ...
2
votes
1answer
1k views

Build kernel headers to compile R1Soft hcp module

I'm running a Xen based VM with CentOS 5, and my hosting provider pushes kernel version 2.6.37.6 from the host machine (so no pv-grub). [root@dev ~]# uname -r 2.6.37.6 I'm trying to install the ...
1
vote
2answers
468 views

New kernel compilation on CentOS

I'm trying to compile and install kernel 3.2.9 for CentOS 5.6. I compiled new kernel and installed kernel modules: make && make modules_install I also created new initrd image: mkinitrd ...
0
votes
2answers
1k views

Kernel update without reboot [duplicate]

Possible Duplicate: Reloading a kernel “live” in CentOS / RHEL 6 How can i update kernel on Centos without reboot .? I found ksplice but it is not supported for Centos. ...
0
votes
1answer
455 views

Yum freezes on Running Transaction Check

Strace: http://pastebin.com/r8D39yLg Kernel: 2.6.18-274.12.1.el5.centos.plus #1 SMP Tue Nov 29 18:16:47 EST 2011 x86_64 x86_64 x86_64 GNU/Linux System: CentOS 5.7 64-bit How to fix this ?
1
vote
1answer
342 views

CentOS OpenVZ fail to boot after kernel update

After upgrading to latest OpenVZ kernel CentOS server won't boot. When i try go boot the latest kernel server is stuck at this point: (note that images are taken from virtual kvm) ...
1
vote
2answers
311 views

Changing VPS provider, kernels changed…broke my iptables how do I fix it?

Hi guys I am changing host providers and I was running centOS 5.7 on my machine with the kernel 2.6.18-274.el5 On my new vps the kernel is 2.6.32.12 and the OS is centOS 5.6...they did not have 5.7 ...
4
votes
1answer
97 views

What happens if a linux kernel argument is passed twice with different values?

As the question states, what if I pass kernel /vmlinuz audit=1 audit=0 Will auditing enabled or disabled? Or will the kernel just freak out? Or is it undefined and will depend on the build of the ...
0
votes
0answers
204 views

Server is crashing - kernel panic - screenshot

Can anyone decipher whats going on in this screenshot : http://i.imgur.com/pJ8FV.jpg My server keeps going down, my host rebooted it and took a photo of the monitor for me Server config: AMD 945 x4 ...
0
votes
1answer
1k views

Is this a memory failure being logged (CentOS web server)

$ sudo tail /var/log/messages Jan 30 13:47:58 www kernel: EDAC MC0: CE row 3, channel 0, label "": Corrected error (Socket=0 channel=1 dimm=1) Jan 30 13:47:58 www kernel: EDAC MC0: CE row 3, channel ...
2
votes
1answer
331 views

Linux kernel module file size

I'm trying to update the kernel on a CentOS 6 machine with a vanilla 3.1.0-rc10 kernel. It seems to work, except the modules that get created are significantly larger in size than those that come ...
0
votes
3answers
11k views

How do i view / enable kernel logs on centos / red hat linux? [duplicate]

Possible Duplicate: How do i view / enable kernel logs on an ec2 instance (amazon linux)? I've got a centos server that i'm playing around with TCP settings in the sysctl.conf to increase ...
0
votes
1answer
138 views

ISP uses modified kernel, how do I use the official kernel on CentOS?

I have just rented a dedicated server from OVH which uses a custom kernel, so whenever I run a command like the following: sudo yum groupinstall 'Development Tools I get errors due to missing ...