Messages in this thread | | | Date | Tue, 24 Jun 2008 23:05:11 +0200 | From | william <> | Subject | Re: strange freeze with VIA C7 dedicated server and libc 2.6.1 |
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> Except for bugs in glibc that trigger things happening as root which go > on to do stuff like power down the system (root is allowed to power > down/reboot/etc). That is a fairly unlikely case.
yes, I know this is something really unbelievable, with nothing in the logs . . . but it happens to at least 20 people, all the upgraded boxes have the problem, and all the downgraded boxes see the problem disappear.
>> that is triggering the bug. Regardless of what that is and whether it should be >> doing it, it shouldn't completely hang the kernel." > The first thing is to find out which glibc version is the latest that > works, which is the earliest that fails. Yes, but I couldnt test it by myself on a production dedicated server.
The nly thing whoich are 100% sure : gentoo : upgrade from glibc-2.5-r4 to glibc-2.6.1 makes the problem appear. debian : upgrade from 2.3.6.ds1-3 to 2.3.6.ds1-13etch5 makes the problem appear. all the debian users who downgraded their libc to 2.3.6.ds1-3 see the problem disappear. ( I suppose the -13 in debian package name means 2.6.3+many patches, probably the 2.3.6.ds1-13etch5 is a 2.6.x ? )
( I coulldn't downgrade libc on gentoo, downgrading libc on gentoo is a nearly suicidal idea )
But, now I have good news, dedibox.fr admins accepted to lend us a box for testing purpose.
I can offer a testing shell with unlimited sudo to any kernel developper, interested in investigating this mystery, and having a gnupg key and a web of trust ( mine is http://pgpkeys.mit.edu:11371/pks/lookup?op=vindex&search=0x690B4E07 we probably have a trust path ).
> Second is to try and find out > what apps or event is the trigger for the fail (eg can you boot into text > mode with init s and then run 2 or 3 cpu hogs all day)
I have have only some details on this point :
* my box freeze during morning sql updates ( updating 300 MB SQL during 3 hours every morning ), but the scrpt is launched with nice -20 * crontab could be related to the problem, it seems to me that I have less freezes since I splitted one big crontab ( launching a 3 hour long script ) in 4 smaller crontabs, some other users said that disabling big crontabs helped * the load is not so big , often between 1 and 2
another thing it did not say in the first mail, after the problem appeared I installed lm_sensors and watchdog to try investigating the problem :
* the temperature is never higher than 54°C which seems ok for a VIA C7, am I wrong ? some people say 54°c is ok, some other says its not normal with a via C7 in a datacenter . . .
* the watchdog says nothing in the logs, but is able to reboot the box.
Thank you very much for your answer Alan, I were hesitating on posting a report with no logs, no clues . . . your answer gives me a little hope ;)
-- Cordialement
William Waisse http://waisse.org | http://neoskills.com http://cahierspip.ww7.be | http://feeder.ww7.be
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