Kernel Panic Diagnosis
Jul 19, 2009
some experience in diagnosing kernel panics. This is my first, the output is below. I really have no idea where to start with this:
Jul 19 16:30:02 server3 kernel: Unable to handle kernel paging request at virtual address ffffff2c
Jul 19 16:30:02 server3 kernel: printing eip:
Jul 19 16:30:02 server3 kernel: f89e8516
Jul 19 16:30:02 server3 kernel: *pde = 65687420
Jul 19 16:30:02 server3 kernel: Oops: 0000 [#1]
Jul 19 16:30:02 server3 kernel: SMP
Jul 19 16:30:02 server3 kernel: Modules linked in: md5 ipv6 parport_pc lp parport ip_conntrack_ftp ip_conntrack_irc ipt_state ipt_ULOG ipt_ecn ipt_ttl ipt_length ipt_mac ipt_TOS ipt_owner ipt_TCPMSS ipt_recent ipt_limit ipt_REJECT ipt_multiport ipt_LOG ip_conntrack iptable_mangle iptable_filter ip_tables autofs4 sunrpc cpufreq_powersave dm_mirror dm_mod button battery ac ohci_hcd ehci_hcd k8_edac edac_mc forcedeth floppy sg ext3 jbd sata_nv libata aic79xx sd_mod scsi_mod
Jul 19 16:30:02 server3 kernel: CPU: 0
Jul 19 16:30:02 server3 kernel: EIP: 0060:[<f89e8516>] Not tainted VLI
Jul 19 16:30:02 server3 kernel: EFLAGS: 00010287 (2.6.9-78.0.1.ELsmp)
Jul 19 16:30:02 server3 kernel: EIP is at do_replace+0x370/0x5bc [ip_tables]
Jul 19 16:30:02 server3 kernel: eax: ffffff00 ebx: f8a92fab ecx: 0000efa8 edx: f893f600
Jul 19 16:30:02 server3 kernel: esi: f8a92f2c edi: f7cfa280 ebp: f8a92fa8 esp: ed151c40
Jul 19 16:30:02 server3 kernel: ds: 007b es: 007b ss: 0068
Jul 19 16:30:02 server3 kernel: Process iptables (pid: 8308, threadinfo=ed151000 task=c934e270)
Jul 19 16:30:02 server3 kernel: Stack: 00000001 00000070 0000efa8 00000000 f8ac3000 f7dbb3c0 00000000 746c6966
Jul 19 16:30:02 server3 kernel: 00007265 00000000 00000000 00000000 00000000 00000000 00000000 0000000e
Jul 19 16:30:02 server3 kernel: 00000543 0003d994 00000000 00000000 00004658 000046ec 00000000 000045c4
Jul 19 16:30:02 server3 kernel: Call Trace:
Jul 19 16:30:02 server3 kernel: [<f89e8946>] do_ipt_set_ctl+0x2e/0x49 [ip_tables]
Jul 19 16:30:02 server3 kernel: [<c0294cb2>] nf_sockopt+0x15d/0x1e7
Jul 19 16:30:02 server3 kernel: [<c0294d4d>] nf_setsockopt+0x11/0x16
Jul 19 16:30:02 server3 kernel: [<c02a8d1d>] ip_setsockopt+0x950/0x97f
Jul 19 16:30:02 server3 kernel: [<c02deefa>] __cond_resched+0x14/0x39
Jul 19 16:30:02 server3 kernel: [<c0294cf0>] nf_sockopt+0x19b/0x1e7
Jul 19 16:30:02 server3 kernel: [<c02deefa>] __cond_resched+0x14/0x39
Jul 19 16:30:02 server3 kernel: [<c02a93c5>] ip_getsockopt+0x616/0x7d9
Jul 19 16:30:02 server3 kernel: [<c017119c>] dput+0x34/0x1a7
Jul 19 16:30:02 server3 kernel: [<c0144a2b>] __rmqueue+0xc1/0x10c
Jul 19 16:30:02 server3 kernel: [<c0144e60>] buffered_rmqueue+0x17d/0x1a5
Jul 19 16:30:02 server3 kernel: [<c014f9c0>] do_anonymous_page+0x1c9/0x1db
Jul 19 16:30:02 server3 kernel: [<c014fa41>] do_no_page+0x6f/0x2f9
Jul 19 16:30:02 server3 kernel: [<c014fe81>] handle_mm_fault+0xdc/0x193
Jul 19 16:30:02 server3 kernel: [<c011b03f>] do_page_fault+0x1ae/0x5c6
Jul 19 16:30:02 server3 kernel: [<c015108b>] vma_merge+0x156/0x165
Jul 19 16:30:02 server3 kernel: [<c02868c1>] sock_common_setsockopt+0x15/0x19
Jul 19 16:30:02 server3 kernel: [<c028486a>] sys_setsockopt+0x72/0x89
Jul 19 16:30:02 server3 kernel: [<c0284f15>] sys_socketcall+0x1ba/0x1fb
Jul 19 16:30:02 server3 kernel: [<c02e09d7>] syscall_call+0x7/0xb
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Nov 1, 2008
I just got 2 'kernel panic' crashes in a row (about 1 hr between them). During that time
I cannot access ssh, I need to contact the datacenter for manual reboot.
I checked logs, and I cannot see anything abnormal. I am also not sure what I should be looking for.
I'm really scarred that this is going to keep hapening.
I actually may have found something in logs:
Nov 1 13:20:43 punky kernel: audit(:0): major=252 name_count=0: freeing multiple contexts (1)
lov 1 13:20:43 punky kernel: audit(:0): major=316 name_count=0: freeing multiple contexts (2)
lov 1 13:20:50 punky pure-ftpd: (shont@84.201.220.8) [INFO] Logout.
Nov 1 13:45:04 punky syslogd 1.4.1: restart.
But I still don't know what this means.
I use CentOS.
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Aug 21, 2007
I have upgraded from kernel 2.6.9 to 2.6.17 and after I completed it is not booting it up, it says Kernel Panic - not syncing: Attempted to kill init!
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Feb 1, 2007
my server every 1-2 time month crash, checking from console i have a kernel panic, in attach the imge, i am using Centos 4.4 with the latest rpm kernel
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Feb 4, 2007
Yesterday one server drops, and after a reboot request, my datacenter said that was because a kernel panic.
After the reboot, the server is online, but i need to figure out exactly what happened.
So I try to look on /var/log, but I couldnt find anything.
Which files exactly should I look for? messages? dmesg?
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Aug 20, 2007
I have upgraded to kernel 2.6.16.X and when I boot, it is showing as kernel panic message.
Kernel Panic - not syncing: Attemted to kill init!
Is it the standard messages? How can I debug? Is there any dump file to trace the problem?
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Apr 11, 2008
I have a hard drive installed with CentOS 5 before.
Now the hard drive had crash (kernel panic)
I insert in Fedora rescue cd and succesfully booted and it mount under /mnt/sysimage
The question is how do I get into the hard drive? I just need to copy 2 files inside my home directory
I cannot see any sdb or anything like that /dev except for sda1~sda15 which I believe is the rescue cd image
#df
/dev /dev
/tmp/loop0 /mnt/runtime
/dev/sda2 /mnt/sysimage
/dev/sda1 /mnt/sysimage/boot
/dev/sda5 /mnt/sysimage/tmp
/dev /mnt/sysimage/dev
i'm now at
sh-3.2#
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Jul 2, 2008
We have experienced a serious downtime of our server due to a "Kernel Panic" problem. The server stops responding to ping requests. When we accessed the console through IPMI, we saw a "Kernel Panic" error detailed here: [url]and [url]
We are running redhat RHEL 5.1
[root@host~]# uname -a
Linux host.com 2.6.18-92.1.1.el5PAE #1 SMP Thu May 22 09:16:17 EDT 2008 i686 i686 i386 GNU/Linux
[root@host~]#
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Nov 24, 2007
I have a cpanel server which goes down with a kernel panic.
In the messages files, i could find the below lines.
The kernel in the server is 2.6.9-55.0.12.ELsmp #1 SMP
h/w is 4 cpu Dual Core AMD Opteron(tm) Processor 265
Is this a kernel bug?
If yes , how can i solve it?
=====================================================
Nov 24 06:28:35 xxx kernel: eip: c0156874
Nov 24 06:28:35 xxx kernel: ------------[ cut here ]------------
Nov 24 06:28:35 xxx kernel: kernel BUG at include/asm/spinlock.h:133!
Nov 24 06:28:35 xxx kernel: invalid operand: 0000 [#1]
Nov 24 06:28:35 xxx kernel: SMP
Nov 24 06:28:35 xxx kernel: Modules linked in: md5 ipv6 parport_pc lp parport autofs4 i2c_dev i2c_core ip_conntrack_ftp ip_conntrack iptable_mangle iptable_filter ip_tables dm_mirror dm_mod button battery ac ohci_hcd ehci_hcd shpchp k8_edac edac_mc snd_intel8x0 snd_ac97_codec snd_pcm_oss snd_mixer_oss snd_pcm snd_timer snd_page_alloc snd_mpu401_uart snd_rawmidi snd_seq_device snd soundcore tg3 ext3 jbd sata_nv 3w_xxxx sata_sil libata sd_mod scsi_mod
Nov 24 06:28:35 xxx kernel: CPU: 2
Nov 24 06:28:35 xxx kernel: EIP: 0060:[<c02d51fb>] Not tainted VLI
Nov 24 06:28:35 xxx kernel: EFLAGS: 00010216 (2.6.9-55.0.12.ELsmp)
Nov 24 06:28:35 xxx kernel: EIP is at _spin_lock+0x1c/0x34
Nov 24 06:28:35 xxx kernel: eax: c02e8cb4 ebx: c0445164 ecx: e9147e5c edx: c0156874
Nov 24 06:28:35 xxx kernel: esi: c0445160 edi: 00000007 ebp: 00000000 esp: e9147e60
Nov 24 06:28:35 xxx kernel: ds: 007b es: 007b ss: 0068
Nov 24 06:28:35 xxx kernel: Process exim (pid: 8603, threadinfo=e9147000 task=f7a25330)
Nov 24 06:28:35 xxx kernel: Stack: 00000001 c0156874 00000000 fff8b500 10000000 f4f9922c c014e3f4 098a0004
Nov 24 06:28:35 xxx kernel: 00000001 00000002 fff8b500 f2f46684 00000000 c014e4a9 00000001 10000000
Nov 24 06:28:35 xxx kernel: 098a0004 f4f9922c f2f46640 00000002 fff8b500 d726e260 098a0004 c014ede1
Nov 24 06:28:35 xxx kernel: Call Trace:
Nov 24 06:28:35 xxx kernel: [<c0156874>] valid_swaphandles+0x42/0x6d
Nov 24 06:28:35 xxx kernel: [<c014e3f4>] swapin_readahead+0x18/0x57
Nov 24 06:28:35 xxx kernel: [<c014e4a9>] do_swap_page+0x76/0x2ea
Nov 24 06:28:35 xxx kernel: [<c014ede1>] handle_mm_fault+0x116/0x193
Nov 24 06:28:35 xxx kernel: [<c011b01b>] do_page_fault+0x1ae/0x5c6
Nov 24 06:28:35 xxx kernel: [<c012052d>] autoremove_wake_function+0x0/0x2d
Nov 24 06:28:35 xxx kernel: [<c0173889>] dnotify_parent+0x1b/0x6e
Nov 24 06:28:35 xxx kernel: [<c015b56a>] vfs_read+0xda/0xe2
Nov 24 06:28:35 xxx kernel: [<c015b75b>] sys_read+0x3c/0x62
Nov 24 06:28:35 xxx kernel: [<c011ae6d>] do_page_fault+0x0/0x5c6
Nov 24 06:28:35 xxx kernel: [<c02d719f>] error_code+0x2f/0x38
Nov 24 06:28:35 xxx kernel: Code: 00 75 09 f0 81 02 00 00 00 01 30 c9 89 c8 c3 53 89 c3 81 78 04 ad 4e ad de 74 18 ff 74 24 04 68 b4 8c 2e c0 e8 f9 d6 e4 ff 58 5a <0f> 0b 85 00 15 7d 2e c0 f0 fe 0b 79 09 f3 90 80 3b 00 7e f9 eb
Nov 24 06:28:35 xxx kernel: <0>Fatal exception: panic in 5 seconds
=====================================================
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Mar 23, 2007
Today my server just crashed instantly... It was running fine with a load of 0.12 but then it went down all the sudden. After a reboot I checked the /var/log/messages file and saw this:
Code:
Mar 23 15:57:00 alpha kernel: Unable to handle kernel NULL pointer dereference at virtual address 00000020
Mar 23 15:57:00 alpha kernel: printing eip:
Mar 23 15:57:00 alpha kernel: c017292b
Mar 23 15:57:00 alpha kernel: *pde = 2085d001
Mar 23 15:57:00 alpha kernel: Oops: 0000 [#1]
Mar 23 15:57:00 alpha kernel: SMP
Mar 23 15:57:00 alpha kernel: Modules linked in: ipt_TOS iptable_mangle ip_conntrack_ftp ip_conntrack_irc ipt_LOG ipt_limit ipt_multiport ipt_state ip_conntr
ack ipt_owner ipt_REJECT iptable_filter ip_tables autofs4 i2c_dev i2c_core sunrpc md5 ipv6 dm_mirror dm_mod button battery ac uhci_hcd ehci_hcd e1000 floppy
ext3 jbd ata_piix libata sd_mod scsi_mod
Mar 23 15:57:00 alpha kernel: CPU: 0
Mar 23 15:57:00 alpha kernel: EIP: 0060:[<c017292b>] Not tainted VLI
Mar 23 15:57:00 alpha kernel: EFLAGS: 00010246 (2.6.9-42.0.3.ELsmp)
Mar 23 15:57:00 alpha kernel: EIP is at dnotify_flush+0xe/0x70
Mar 23 15:57:00 alpha kernel: eax: c0446c40 ebx: ca05dd80 ecx: 0046ef00 edx: f1d95300
Mar 23 15:57:00 alpha kernel: esi: 00000000 edi: ca05dd80 ebp: f1d95300 esp: eb3f3fa0
Mar 23 15:57:00 alpha kernel: ds: 007b es: 007b ss: 0068
Mar 23 15:57:00 alpha kernel: Process httpd (pid: 28057, threadinfo=eb3f3000 task=efaf03b0)
Mar 23 15:57:00 alpha kernel: Stack: ca05dd80 00000220 f1d95300 eb3f3000 c015a7e5 0000020f bff65b64 bff65af0
Mar 23 15:57:00 alpha kernel: c02d47cb 0000020f 0046eff4 08cd4e6c bff65b64 bff65af0 bff615b8 00000006
Mar 23 15:57:00 alpha kernel: c02d007b 0000007b 00000006 0032a7a2 00000073 00000246 bff61598 0000007b
Mar 23 15:57:00 alpha kernel: Call Trace:
Mar 23 15:57:00 alpha kernel: [<c015a7e5>] filp_close+0x49/0x5f
Mar 23 15:57:00 alpha kernel: [<c02d47cb>] syscall_call+0x7/0xb
Mar 23 15:57:00 alpha kernel: [<c02d007b>] packet_rcv+0x17e/0x307
Mar 23 15:57:00 alpha kernel: Code: 00 89 c3 85 d2 74 0e 8b 42 04 8b 12 25 ff ff ff 7f 09 c1 eb ee 89 8b 34 01 00 00 5b c3 55 89 d5 57 89 c7 56 53 8b 40 08 8
b 70 10 <0f> b7 46 20 25 00 f0 00 00 3d 00 40 00 00 75 4d 8d 46 68 e8 fb
Mar 23 15:57:00 alpha kernel: <0>Fatal exception: panic in 5 seconds
Mar 23 16:06:46 alpha syslogd 1.4.1: restart.
So it seems like httpd crashed my server? I checked the Apache error_log and noticed lines like these:
Code:
*** glibc detected *** free(): invalid pointer: 0x08872c98 ***
[Fri Mar 23 15:57:03 2007] [error] [client x.x.x.x] Premature end of script headers: /home/user/public_html/forum/index.php
[Fri Mar 23 15:57:03 2007] [error] [client x.x.x.x] File does not exist: /home/user/public_html/500.shtml
When I look at the whole error_log it seems like such errors appear frequently and for different websites and PHP applications. This isn't the only glibc error, there's also stuff like "*** glibc detected *** corrupted double-linked list: 0x088e0bb8 ***". I have recently installed eAccelerator and searched the web: I'm not the only one who has such problems with eAccelerator. Do you think these glibc errors may have caused the server to crash?
Also, lately I noticed a lot of lines like these in the /var/log/messages file:
Code:
Mar 23 15:47:45 alpha kernel: post_create: setxattr failed, rc=122 (dev=sda7 ino=4318565)
and
Code:
Mar 23 15:50:56 alpha ntpd[2958]: sendto(66.111.46.200): Operation not permitted
I've done some Google'ing on the first error and it seems like someone with the same error got it fixed by running a filesystem check... By the way /dev/sda7 is my /home directory. But in order to run a filesystem check I need to disable all services and unmount /home? That's kind of a pain in the ***... In general, how long do you think it takes to run a filesystem check? Here's information about my /home partition:
Code:
/dev/sda7 198G 71G 118G 38% /home
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Mar 9, 2007
I got following message after kernel upgrade ( to 2.6.20.1)
Kernel Panic - not syncing: Attempted to kill init!
no any log
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Mar 29, 2007
we have one box in hivelocity.net that has been down so many times this month that we were forced to remove links to siteuptime where we were once so proud of having a 99.7% uptime for 3 years in theplanet.
syslog shows that just before crashing, these entries were made:
kernel: kernel BUG at mm/rmap.c:479
kernel: invalid operand:0000 [#1]
dmesg also shows this:
...
Brought up 2 CPUs
zapping low mappings.
checking if image is initramfs... it is
Freeing initrd memory: 482k freed
NET: Registered protocol family 16
PCI: PCI BIOS revision 2.10 entry at 0xf9f20, last bus=1
PCI: Using configuration type 1
mtrr: v2.0 (20020519)
mtrr: your CPUs had inconsistent fixed MTRR settings
mtrr: probably your BIOS does not setup all CPUs.
mtrr: corrected configuration.
...
i've googled these messages and they point to ram problems.
hivelocity.net claims to have done diagnostics on the box and that there were no problems reported.
they said this is a result of a sys configuration problem made by us.
any ideas?
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May 20, 2009
running centos/virtuozzo 2.6.18-028stab062.3
when i configure vmware it asks at one point for kernel header files. where would i find them to match the current kernel?
i asked at parallels forums but help there is very scarce. i checked openVZ repositories and they dont yet have headers for this version.
what are my options? i have one last windows machine left and want to run it in VMware.
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Apr 29, 2007
Last year I ordered a new server with Centos 4.3 and it had the kernel kernel 2.6.9-34.0.2ELsmp installed. It runned fine and I didn't update any packages since then.
Today I started getting a problem where both mysqld and kswapd0 uses very high amounts of CPU, spiking up to 100% and my memory usage is at 99% all the time. The problem seems exactly the same as the one mentioned in this thread.
In that thread the exact same kernel is said to be insecure and to cause this problem. I also came across a centOS bug that reports this problem with high cpu, mem usage and mysql & kswapd0 consuming all resources.
In the linked thread the person solved the problem by upgrading to kernel 2.6.9-42 using rpms but others recommended a newer kernel or a custom compiled kernel for CentOS.
Apparently when they used yum it said 34.0.2 was the latest kernel.
What should I do to upgrade the kernel, which version should i upgrade to, and where do I get it from? I won't be able to compile a custom kernel and I've only installed basic rpm packages before.
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May 13, 2007
I am trying to install the kernel source.
I have downloaded kernel-2.6.20-1.2948.fc6.src.rpm
I am using fedora 6 64bit.
here are my current kernels:
kernel-headers-2.6.20-1.2948.fc6
kernel-devel-2.6.20-1.2944.fc6
yum-kernel-module-1.0.3-1.fc6
kernel-2.6.20-1.2944.fc6
kernel-devel-2.6.20-1.2948.fc6
kernel-2.6.20-1.2948.fc6
here is what I seen when I installed kernel-2.6.20-1.2948.fc6.src.rpm
rpm -ivh kernel-2.6.20-1.2948.fc6.src.rpm
1:kernel warning: user brewbuilder does not exist - using root
warning: group brewbuilder does not exist - using root
warning: user brewbuilder does not exist - using root
########################################### [100%]
warning: user brewbuilder does not exist - using root
warning: group brewbuilder does not exist - using root
then when I ran:
rpmbuild -bp --target=$(uname -m) /usr/src/redhat/SPECS/kernel-2.6.spec
I seen this error:
+ Arch=x86_64
+ make ARCH=x86_64 nonint_oldconfig
In file included from /usr/include/sys/socket.h:35,
from /usr/include/netinet/in.h:24,
from /usr/include/arpa/inet.h:23,
from scripts/basic/fixdep.c:117:
/usr/include/bits/socket.h:310:24: error: asm/socket.h: No such file or directory
make[1]: *** [scripts/basic/fixdep] Error 1
make: *** [scripts_basic] Error 2
error: Bad exit status from /var/tmp/rpm-tmp.93770 (%prep)
I need to have this installed to get a app installed etc...
suggestions or ideas?
thanks
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Apr 4, 2009
I have a Xen VPS. I started with a Debian 4 image and have since upgraded to Debian 5. Firstly was this advisable? Secondly what Kernel version should I be running, or rather is it set by my installation or by the Xen server?
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Feb 15, 2007
Does it take 2 hours to have a new kernel up and running? The tech is taking forever to finish.
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Apr 24, 2009
as part of a project I have lately been looking into various aspects of kernel tuning. Most notably lately tuning the TCP stack for more efficient memory usage/throughput.
Thought I would start this thread to mention some of the tools I'd found for doing testing and see what anyone else had to recommend.
So far my favorite of the bunch is nuttcp. Its easy to use and gives a very good idea of how much of your bandwidth you are able to utilize.
A few interesting web pages are as follows for anyone interested in the topic:
[url]- Tuning TCP for High Bandwidth Delay networks
[url]- TCP Tuning Cook book, some interesting information in there as well
[url]...formanceTuning - Performance Tuning TWiki. Has a list of useful tools, flags for existing tools and ways to monitor network performance from a system level, along with some suggestions of things to correct
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Aug 4, 2009
What is the best way to find out which filesystems and harddrive drivers you can remove? Obviously, i need ext2,3 but how do you find which HD you only need?
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Jun 15, 2009
recently,my dedicated server down frequently,
i can not find any important info from /var/log/messages
but i find some records many time on it,those like
----------------------------------
Jun 15 05:30:40 server kernel: ata1.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x0
Jun 15 05:30:40 server kernel: ata1.00: (irq_stat 0x40000001)
Jun 15 05:30:40 server kernel: ata1.00: cmd 25/00:08:42:23:d2/00:00:2c:00:00/e0 tag 0 cdb 0x0 data 4096 in
Jun 15 05:30:40 server kernel: res 51/40:00:42:23:d2/00:00:2c:00:00/e0 Emask 0x9 (media error)
Jun 15 05:30:40 server kernel: ata1.00: configured for UDMA/133
Jun 15 05:30:40 server kernel: ata1: EH complete
Jun 15 05:30:42 server kernel: ata1.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x0
Jun 15 05:30:42 server kernel: ata1.00: (irq_stat 0x40000001)
Jun 15 05:30:42 server kernel: ata1.00: cmd 25/00:08:42:23:d2/00:00:2c:00:00/e0 tag 0 cdb 0x0 data 4096 in
Jun 15 05:30:42 server kernel: res 51/40:00:42:23:d2/00:00:2c:00:00/e0 Emask 0x9 (media error)
Jun 15 05:30:42 server kernel: ata1.00: configured for UDMA/133
Jun 15 05:30:42 server kernel: ata1: EH complete
Jun 15 05:30:44 server kernel: ata1.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x0
Jun 15 05:30:51 server kernel: ata1.00: (irq_stat 0x40000001)
Jun 15 05:30:51 server kernel: ata1.00: cmd 25/00:08:42:23:d2/00:00:2c:00:00/e0 tag 0 cdb 0x0 data 4096 in
Jun 15 05:30:51 server kernel: res 51/40:00:42:23:d2/00:00:2c:00:00/e0 Emask 0x9 (media error)
Jun 15 05:30:51 server kernel: ata1.00: configured for UDMA/133
Jun 15 05:30:51 server kernel: ata1: EH complete
Jun 15 05:30:51 server kernel: ata1.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x0
Jun 15 05:30:51 server kernel: ata1.00: (irq_stat 0x40000001)
Jun 15 05:30:51 server kernel: ata1.00: cmd 25/00:08:42:23:d2/00:00:2c:00:00/e0 tag 0 cdb 0x0 data 4096 in
Jun 15 05:30:51 server kernel: res 51/40:00:42:23:d2/00:00:2c:00:00/e0 Emask 0x9 (media error)
Jun 15 05:30:51 server kernel: ata1.00: configured for UDMA/133
Jun 15 05:30:51 server kernel: ata1: EH complete
Jun 15 05:30:51 server kernel: ata1.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x0
Jun 15 05:30:51 server kernel: ata1.00: (irq_stat 0x40000001)
Jun 15 05:30:51 server kernel: ata1.00: cmd 25/00:08:42:23:d2/00:00:2c:00:00/e0 tag 0 cdb 0x0 data 4096 in
Jun 15 05:30:51 server kernel: res 51/40:00:42:23:d2/00:00:2c:00:00/e0 Emask 0x9 (media error)
Jun 15 05:30:51 server kernel: ata1.00: configured for UDMA/133
Jun 15 05:30:52 server kernel: ata1: EH complete
Jun 15 05:31:26 server kernel: ata1.00: configured for UDMA/133
Jun 15 05:31:30 server kernel: sd 0:0:0:0: SCSI error: return code = 0x08000002
Jun 15 05:31:33 server kernel: sda: Current [descriptor]: sense key: Medium Error
Jun 15 05:31:36 server kernel: Add. Sense: Unrecovered read error - auto reallocate failed
Jun 15 05:31:36 server kernel:
Jun 15 05:31:39 server kernel: Descriptor sense data with sense descriptors (in hex):
Jun 15 05:31:46 server kernel: 72 03 11 04 00 00 00 0c 00 0a 80 00 00 00 00 00
Jun 15 05:31:51 server kernel: 2c d2 23 42
Jun 15 05:31:56 server kernel: end_request: I/O error, dev sda, sector 751969090
Jun 15 05:31:57 server kernel: ata1: EH complete
Jun 15 05:31:57 server kernel: SCSI device sda: 976773168 512-byte hdwr sectors (500108 MB)
Jun 15 05:31:58 server kernel: sda: Write Protect is off
Jun 15 05:31:58 server kernel: SCSI device sda: drive cache: write back
Jun 15 05:31:59 server kernel: SCSI device sda: 976773168 512-byte hdwr sectors (500108 MB)
Jun 15 05:32:03 server kernel: sda: Write Protect is off
Jun 15 05:32:04 server kernel: SCSI device sda: drive cache: write back
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is it safe ? or any hardware error?
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Jul 7, 2009
can i upgrade my kernel?
yum cant find any new update but my kernel version is 2.6.18-128.1.1.el5.028stab062.3PAE
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Jun 13, 2009
I have following error in kernel update with yum:
Downloading Packages:
Running rpm_check_debug
ERROR with rpm_check_debug vs depsolve:
Package kernel conflicts with ecryptfs-utils < 44.
Complete!
So kernel not updated yet.
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Jun 20, 2009
I copied the default config file and renamed it as .config but I get this:
Code:
WARNING: No module dm-mem-cache found for kernel 2.6.27.10-grsec, continuing anyway
WARNING: No module dm-region_hash found for kernel 2.6.27.10-grsec, continuing anyway
WARNING: No module dm-message found for kernel 2.6.27.10-grsec, continuing anyway
WARNING: No module dm-raid45 found for kernel 2.6.27.10-grsec, continuing anyway
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Jul 20, 2009
My current kernel version is "2.6.9-42.0.10.ELsmp #1 SMP Fri Feb 16 17:17:21 EST 2007 i686 athlon i386 GNU/Linux". I want it to be upgraded since it is old. I have been told by our server management company that the latest kernel distributed from yum is kernel.i686 0:2.6.9-78.0.22.E. Can anyone tell me if this version is safe and secure enough? It is a CentOS release 4.7 (Final) server with cPanel installed.
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Aug 1, 2009
i have a dedicated server with Centos 5.2 32bit.
my cpu is 64bit but for some software, datacenter install 32bit for me.
i need more ram and order to datacenter, before my ram was 4 Gig and now my ram is 6 gig . but cpu just use 3 gig of ram.
i install kernel-PAE with "yum install kernel-PAE " command and my ram down to 2.5 Gig. now my server used just 2.5 gig of ram.
i can not reformat server because of i have some vps in this server ( Xen vps )
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Jul 12, 2009
when doing 2.6.26+ or w/e it is, how do you enable conntrack, what options do i need to enable under make menuconfig?
net.netfilter.nf_conntrack_acct = 1
net.netfilter.nf_conntrack_generic_timeout = 120
error: "net.netfilter.nf_conntrack_icmp_timeout" is an unknown key
error: "net.netfilter.nf_conntrack_tcp_timeout_close" is an unknown key
error: "net.netfilter.nf_conntrack_tcp_timeout_time_wait" is an unknown key
error: "net.netfilter.nf_conntrack_tcp_timeout_last_ack" is an unknown key
error: "net.netfilter.nf_conntrack_tcp_timeout_close_wait" is an unknown key
error: "net.netfilter.nf_conntrack_tcp_timeout_fin_wait" is an unknown key
error: "net.netfilter.nf_conntrack_tcp_timeout_established" is an unknown key
error: "net.netfilter.nf_conntrack_tcp_timeout_syn_recv" is an unknown key
error: "net.netfilter.nf_conntrack_tcp_timeout_syn_sent" is an unknown key
error: "net.netfilter.nf_conntrack_udp_timeout" is an unknown key
error: "net.netfilter.nf_conntrack_udp_timeout_stream" is an unknown key
net.netfilter.nf_conntrack_max = 262144
and how do i know which hardware/devices that i can remove?
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Jul 24, 2009
I have a FreeBSD server crashing a few times per week sometimes 2 or 3 times in one day, then 3 days fine sometimes each other day...
/var/log/messages shows nothing related to the reboot when looking at the server screen after a crash, it showed kernel panic
any ideas on how to troubleshoot that with the minimum downtime possible? DC already tried swapping memory, but it didn't solve
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May 12, 2008
I am using centos 4.6 on 2.6.9-67smp kernel
I need to update the kernel to 2.6.25.3
is that possible ?
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Dec 24, 2008
I've never actually compiled a kernel before, and wanted to know the basics when it comes to compiling for a standard CPanel/Centos 32bit system.
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Jul 9, 2008
i compiled my kernel and i have problem.. i dont have lilo on my server so i dont know how to change the grub.conf file to boot my new kernel..
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Jun 28, 2008
How Can i translate An Kernel Exploit to secure my server like that
[url]
how can i now what i do to my server if i see any exploit
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