Date: Fri, 27 Jun 2003 00:04:16 -0300 (ADT) From: "Marc G. Fournier" <scrappy@hub.org> To: freebsd-stable@freebsd.org Subject: changes in kernel affecting savecore/dumps ... Message-ID: <20030626235415.M98477@hub.org>
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David gave me some suggestions to check out on the servers, but so far, its all drawing a blank ... I have two servers right now that are updated to recent 4.8-STABLE kernels ... one was June 22nd, and the other was upgraded June 20th ... both of them have crashed since that date, and both of them tell me that they are unable to produce a core file, with the same errors: Jun 26 04:27:14 jupiter savecore: warning: /kernel version mismatch: "FreeBSD 4.8-STABLE #2: Fri Jun 20 18:34:14 ADT 2003 " and "" Prior to those kernel upgrades, I had no problems generating core files, and nothing has changed configuration wise, except as results from upgrading the OS using 'installworld/installkernel/mergemaster' ... On Jupiter, previous to the Jun 20th upgrade, I was able to generate two cores off of a Jun 6th kernel, so something between Jun 6th and Jun 20th has changed ... Does anyone know of *anything* that may have been commit'd in that period of time that could have affected how a crash dumps to the dumpdev? Note that the servers don't make much use of swap as it is ... one of the machines that is exhibiting the problem has been up 4+days now, and swap used is: pluto# pstat -s Device 1K-blocks Used Avail Capacity Type /dev/da0s1b 8388480 10652 8377828 0% Interleaved when pluto crashed, I was able to get in just after and run 'savecore -f' to generate the core file, and doing a 'strings <core> | head', I compared it with a "good" core, and the first few bytes *look* identical, but neither of them show anything in the first few bytes that would come close to matching the above string, so am not sure where core_vers is read from ... Help? Right now, jupiter is going once a night, with nothing in messages to indicate a problem, and no core to look at :( Thanks ...
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