Hi Dave, Le 21/01/2013 14:37, Dave Anderson a écrit : > > > ----- Original Message ----- >> Hello, >> >> Is it possible to extract the content of the kernel buffer (result of >> the 'log' command) from a kernel dump without access to the kernel debug >> symbols ? >> >> The intent is to be able to retrieve a minimal set of information from >> the dump on a system that doesn't have to possibility to install the >> namelist with debug symbols. >> >> TIA, >> >> Kind regards, >> >> ...Louis >> -- >> Louis Bouchard >> Backline Support Analyst >> Canonical Ltd >> Ubuntu support: http://landscape.canonical.com > > Do you guys (Ubuntu) have makedumpfile as part of your kdump facility? > It does just that, using the debug/offset information contained in > the vmcoreinfo data: > > $ man makedumpfile > ... > --dump-dmesg > This option overrides the normal behavior of makedumpfile. > Instead of compressing and filtering a VMCORE to make it > smaller, it simply extracts the dmesg log from a VMCORE and > writes it to the specified LOGFILE. If a VMCORE does not contain > VMCOREINFO for dmesg, it is necessary to specfiy [-x VMLINUX] or > [-i VMCOREINFO]. > > Example: > # makedumpfile --dump-dmesg /proc/vmcore dmesgfile > # makedumpfile --dump-dmesg -x vmlinux /proc/vmcore dmesgfile > ... > > Dave > > -- > Crash-utility mailing list > Crash-utility@xxxxxxxxxx > https://www.redhat.com/mailman/listinfo/crash-utility > Yep, makedumpfile is used by default. How about that for self-inflicted 'ridicule'! I've been co-maintaining makedumpfile for Debian for the last three releases, I should have known better :-) Thanks for pointing me to that ! Kind regards, ...Louis Now I know that -- Louis Bouchard Backline Support Analyst Canonical Ltd Ubuntu support: http://landscape.canonical.com -- Crash-utility mailing list Crash-utility@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/crash-utility