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BUG: soft lockup CPU stuck for 10seconds (Server went down)
by Roland RoLaNd 08 Mar '11

08 Mar '11

Hello, Today my server stopped responding. i went to the console and on the screen there were a continuous loop of the following info shown on the screen: BUG: soft lockup - CPU#0 stuck for 10s! [java:13959] and alot of other information. ii've took a screen shot of the info shown , you can find it under the following url: http://img585.imageshack.us/i/img00012201103070833.jpg/ and had to hard reset for it to be back up and running. i tried googling with no luck for direct relevant info. so hoping you can help out Thanks, --Roland

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email to web posting software?
by Dave Stevens 07 Mar '11

07 Mar '11

Dear CentOS, I have a user group that would like to be able to routinely post (easily) emails to a web site. Must be usable without special training. I have no experience with this. Anyone have a suggestion? LAMP stack installed. Dave -- When a respected information source covers something where you have on-the- ground experience, the result is often to make you wonder how much fecal matter you've swallowed in areas outside your own expertise. -- Rusty Russell

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Centos 6
by JD 07 Mar '11

07 Mar '11

Any word on approximate release date of Centos 6? Cheers, JD

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OT: grep regex pointer appreciated
by Patrick Lists 07 Mar '11

07 Mar '11

Hi, My grep regex foo is not very good and googling is getting me nowhere so hopefully someone is kind enough to give me some pointers. Goal: grep (non .dbg) filenames and versions from a ftp dir listing and a raw html file: $ wget --no-remove-listing -O ftp-index.txt ftp://127.0.0.1/test/ $ wget --no-remove-listing -O index.html http://127.0.0.1/test/ The relevant parts of the files above (first one is ftp listing, second part is the html file, both copied to test_regex.txt) are: 2011 Jan 28 21:25 File <a href="ftp://127.0.0.1/bar-4.5.6.i686.dbg.tgz">bar-4.5.6.i686.dbg.tgz</a> (5551274 bytes) 2011 Jan 28 21:25 File <a href="ftp://127.0.0.1/bar-4.5.6.i686.tgz">bar-4.5.6.i686.tgz</a> (5551274 bytes) 2011 Jan 28 21:25 File <a href="ftp://127.0.0.1/bar-4.5.6.x86_64.dbg.tgz">bar-4.5.6.x86_64.dbg.tgz</a> (5551274 bytes) 2011 Jan 28 21:25 File <a href="ftp://127.0.0.1/bar-4.5.6.x86_64.tgz">bar-4.5.6.x86_64.tgz</a> (5551274 bytes) <tr><td><a href="foo-bar-1.2.3+1.2.3.tar.gz">foo-bar-1.2.3+1.2.3.tar.gz</td></tr> This is what I now have (improvements most welcome): $ egrep -o ">([A-Za-z_-]+)([[:digit:]]{1,3}(\.[[:digit:]]{1,3})*).+(.|t)gz" ./test_regex.txt | grep -v ".dbg" | tr -d '>' Output: foo-bar-1.2.3+1.2.3.tar.gz baz-4.5.6.i686.tgz baz-4.5.6.x86_64.tgz So far so good but now I also want to get the version numbers which I can't figure out. Anyone have a pointer how to get the version number from these filenames (1.2.3+1.2.3 and 4.5.6)? Thanks! Patrick

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IPERF Server
by Matt 07 Mar '11

07 Mar '11

When starting IPERF with "iperf -s" or "iperf -sD" it seems to stop after client runs its first test. I would like to leave it running for a few hours to give someone a chance to run a few tests. Is there a way to leave it active on the server and kill it manually later?

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Re: [CentOS] IP6 Anyone?
by sheraznaz＠yahoo.com 07 Mar '11

07 Mar '11

>> Always learning wrote: >> I always thought, mistakenly, IP6 was 6 segments, because it was IP6. IP4 had 4 segments. However IP6 is >actually IP version 6 and it has 8 segments. I don't think I ever heard IP6, but always IPv6. Counting segments might not be as meaningful. IPv6 has twice (8) segments compared to IPv4 however each segment is 2 octets making IPv6 address space 4 times (128 bits) compared to IPv4 (32 bits). Thanks Sheraz Sent from my Verizon Wireless BlackBerry

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Re: [CentOS] CentOS and Marvell SAS/SATA drivers
by Chuck Munro 07 Mar '11

07 Mar '11

On 03/06/2011 09:00 AM, compdoc wrote: > >> >Regarding the Marvell drivers, I had good luck with the 'sata_mv' driver >> >in Scientific Linux 6 just yesterday, running a pair of 4-port PCIe-x4 >> >Tempo 'Sonnet' controller cards. > Are those the Mac/Windows Sonnet cards that go for less than $200? > > What kind of performance you seeing? Are you doing software raid on them? Yes, those are the cards which target Windows and OS-X, but they work fine on Linux as well. They use the Marvell 88SX series chips. They control 6 2TB WD Caviar Black drives, arranged as 5 drives in a RAID-6 array with one hot spare. 3 drives are connected to each of two cards. mdstat shows array re-sync speed is usually over 100 MBytes/sec although that tends to vary quite a bit over time. > ------------------------------ > On 03/06/2011 09:00 AM, John R Pierce wrote: > > On 03/05/11 7:01 AM, Eero Volotinen wrote: >> > >> > areca works.. >> > >> > > for SAS, I prefer LSI Logic. The Supermicro mobo I'm using (X8DAL-3) has an on-board LSI 1068E SAS/SATA controller chip, although I have the RAID functionality disabled so I can use it as a bunch of drives for software RAID-6. Like the Tempo cards, it has 6 2TB WD SATA drives attached which provides a second set of arrays. Performance really sucks, for some unknown reason, and I get lots of I/O error messages logged when the drives get busy. There appears to be no data corruption, just a lot of retries that slow things down significantly. The LSI web site has no info about the errors. The firmware is passing back I/O abort code 0403 and LSI Debug info related to "channel 0 id 9". There are only 8 ports so I don't know which disk drive may or may not be causing problems. The SMART data on all disks shows no issues, although I tend to treat some SMART data with scepticism. I need to track this error down because my understanding is that the LSI controller chip has very good performance. Chuck

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kernel NETDEV WATCHDOG: eth0: transmit timed out
by sync 07 Mar '11

07 Mar '11

Hi , all : Sometimes my server network connection on Linux goes down with short message in syslog saying: "[localhost kernel] NETDEV WATCHDOG: eth0: transmit timed out" (or similar). By the way , I installed the CentOS 5.4 x86_64 bit and the kernel version was 2.6.18-164. Has anyone experienced this problem or is it the bug of the kernel ? I restart the network and that problem have resolved just now.

5 5

Gnu Screen - terminal issues
by Sean Carolan 07 Mar '11

07 Mar '11

I really like gnu screen and use it everyday but there's one thing that is a bit inconvenient, and that's the odd line wrapping and terminal size issues that seem to pop up. The problem crops up when I type or paste a really long command, and then go back and try to edit it; the text starts to wrap over itself and you have no idea what you are editing. Any fixes for this?

9 33

Updating hardware clock from cron
by Kenneth Porter 06 Mar '11

06 Mar '11

Is there a package to do this? Normally the hardware clock is set during shutdown if one is running ntpd. But if a long-running server shuts down unexpectedly, this isn't done, and the hardware clock might be off by a lot when it comes back up. So setting it periodically from a cron job could be useful. What do others do? Adding a one liner to /etc/cron.daily that invokes /etc/rc.d/init.d/ntpd would do it but it seems heavyweight to restart ntpd. Alas, the script doesn't export just the sync_hwclock function.

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