Messages in this thread | | | Date | Tue, 14 Mar 2006 12:16:23 -0500 | From | Gene Heskett <> | Subject | Re: Dmesg is not showing whole boot list |
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On Tuesday 14 March 2006 10:05, Phillip Susi wrote: >Or look in your /var/log/kern.log file instead of asking dmesg. dmesg >just dumps the kernel ring buffer which is of finite size. The entire >contents should be logged to /var/log/kern.log.
You've got to have /var checked and mounted to be able to do that log write, if the buffer overflows before that, then the head end of the dmesg dump to the /var/log/dmesg file is lost forever.
There is a line that can be changed, in xconfig or by hand, to control the memory allocated for this ring buffer.
Finally found it in the xconfig display, left panel line=kernel hacking, right panel its under kernel debugging and shows only if thats checked, double click on the line that says : kernel log buffer size and enter a one digit increment from whats there now, maybe 2, I have mine set for 16. Your default may be as low as 14, why I have NDI because 16k sure as heck isn't enough if something gets chatty.
>Peter Hagervall wrote: >> On Tue, Mar 14, 2006 at 09:01:27AM +0100, CIJOML wrote: >>> Hello, >>> >>> maybe this si a wrong list to ask, bug after boot, dmesg shows that >>> few lines at the beginning are missing. >>> >>> Is there any option I can increase to get full dmesg? >> >> Try increasing CONFIG_LOG_BUF_SHIFT and recompile. That's likely the >> source of your problem. >> >> >> >> Peter Hagervall > >- >To unsubscribe from this list: send the line "unsubscribe > linux-kernel" in the body of a message to majordomo@vger.kernel.org >More majordomo info at http://vger.kernel.org/majordomo-info.html >Please read the FAQ at http://www.tux.org/lkml/
-- Cheers, Gene People having trouble with vz bouncing email to me should add the word 'online' between the 'verizon', and the dot which bypasses vz's stupid bounce rules. I do use spamassassin too. :-) Yahoo.com and AOL/TW attorneys please note, additions to the above message by Gene Heskett are: Copyright 2006 by Maurice Eugene Heskett, all rights reserved. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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