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+--- Thread: site uptime, kernel uptime reset itself. (/thread-2446.html)
site uptime, kernel uptime reset itself. - anyweb - 2005-09-06
hi guys
according to
Quote:[root@www root]# w 16:21:03 up 21:10, 3 users, load average: 0.04, 0.04, 0.00the site is up only a few hours, which to me is rather annoying....
I didn't reboot it, further examination revealed that all logs are OK and not one of them mentions a reboot or crash, indeed not only that but ifconfig shows data throughput that just 'doesnt happen' on linux-noob.com in 21 hours....
Quote:[root@www root]# ifconfig eth0eth0 Link encap:Ethernet HWaddr 00:B0:D0:88:FF:78
inet addr:100.0.0.3 Bcast:100.0.255.255 Mask:255.255.0.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:176864105 errors:55592 dropped:0 overruns:11 frame:103017
TX packets:232565472 errors:0 dropped:0 overruns:0 carrier:181978122
collisions:988797 txqueuelen:1000
RX bytes:2689469193 (2564.8 Mb) TX bytes:1705211768 (1626.2 Mb)
Interrupt:10 Base address:0xfc00
ok then, so what is happening here ?
well according to this site the uptime changed after a certain number of days/hours
[/url]http://en.uptime-project.net/page.php?page...ofile&uid=60313
Quote:1. 26.04.2004 14:42 GMT 05.09.2005 16:21 GMT 1y 132d 01h 38m 07s Linux 2.4.22-1.2188.nptl
and we all know that there are 365 days or so in the year, and 365+132 =497 days....
well guess what. the above linux kernel (fedora) was unpatched for a uptime overflow after 497 days, so the server did NOT reboot, but the uptime WAS RESET by a bug in the kernel.
[url=https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=97373]https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=97373
if only i knew before it 'reset' itself.
dam annoying and i'd like to announce this post so that others may be aware in the future.
cheers
anyweb
site uptime, kernel uptime reset itself. - znx - 2005-09-06
Quote:well guess what. the above linux kernel (fedora) was unpatched for a uptime overflow after 497 days, so the server did NOT reboot, but the uptime WAS RESET by a bug in the kernel.
[/url][url=https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=97373]https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=97373
if only i knew before it 'reset' itself.
dam annoying and i'd like to announce this post so that others may be aware in the future.
ah yeah, i remember reading about this on linux-counter (are you COUNTED! [img]<___base_url___>/uploads/emoticons/default_laugh.png[/img] ) its ashame that you can't view your 'real' uptime without adding on the missing day count..
Quote:NOTE: The Linux kernel (at least up to 2.4.2) has a flaw: It computes the result of the "uptime" based on the internal "jiffies" counter, which counts the time since boot, in units of 10 milliseconds.This is typecast as an "unsigned long" - on the Intel boxes, that's an unsigned 32-bit number.
Well, it turns out that in a 32-bit number, you can store 497.1 days before the number wraps. So all the numbers higher than this on this list are because:
* They are not Intel architectures
* They have sent in updates on both sides of the wrap, and my scripts have successfully correlated them and concluded that it was a wrap, not a reboot.
Thanks to Brian "Z" Frappier for alerting me to the problem!
sending an e-mail to the uptime-project guys... im sure they have experienced this before.. maybe they can inject a fix..
site uptime, kernel uptime reset itself. - dasunst3r - 2005-09-07
Poor anyweb had his uptime reset... does he need a hug? [img]<___base_url___>/uploads/emoticons/default_rolleyes.gif[/img][img]<___base_url___>/uploads/emoticons/default_laugh.png[/img]
site uptime, kernel uptime reset itself. - anyweb - 2005-09-08
well it did annoy me,
the laptop is still running fedora core release 1 and has this site mirrored on it, however i've installed a separate machine with fedora core release 4 and it is now running linux-noob.com
cheers
anyweb
site uptime, kernel uptime reset itself. - znx - 2005-09-09
after e-mailing uptime-project.. i was initially disappointed with the reply, however they have now indcated that they will look into it.. so fingers crossed that the issue is 'fixed' their end :)
site uptime, kernel uptime reset itself. - anyweb - 2005-10-04
screw the project
i finally powered down that fcr1 laptop today after 525 days uptime (zero reboots).
cheers
anyweb
site uptime, kernel uptime reset itself. - Guest - 2008-01-11
Quote:Poor anyweb had his uptime reset... does he need a hug?
:)
site uptime, kernel uptime reset itself. - DustyBin - 2008-01-12
525 days? jeeze that is a LONG time, especially for a laptop too! [img]<___base_url___>/uploads/emoticons/default_ohmy.png[/img]