Hi Kumagai-san, Le 23/01/2013 02:19, Atsushi Kumagai a ?crit : > Hello Louis, > > On Tue, 22 Jan 2013 14:52:09 +0100 > Bouchard Louis <louis.bouchard at canonical.com> wrote: > >> Hello Kumagai-san, >> >> Following a suggestion from Dave Anderson, I have tested the >> makedumpfile --dump-dmesg option. After some research, I realized that >> the option was no longer working on 3.5 kernel and later. Here is an >> example of the result (on Ubuntu Quantal) : >> >> # makedumpfile --dump-dmesg /proc/vmcore /tmp/dmesg >> dump_dmesg: Can't find some symbols for log_buf. >> >> makedumpfile Failed. >> >> On 3.5 kernel and later, the log_end symbol no longer exists. >> >> This is caused by the change from byte-buffer structure to >> variable-length record buffer of the kernel log buffer introduced by >> this commit : >> http://goo.gl/NCgLI >> >> I am curious to know if you were aware of this change and if you had >> done some work on modifying dump_dmesg() accordingly ? Just so I don't >> go off and try to work on something that you have already solved. > > Thanks for your report. > I haven't been aware of this, so could I ask you to help me ? > I will be happy to do so. Dave Anderson has already fixed in for crash, so I have an example to follow. I've already started work on a patch for the post 3.5 kernels. I might need to come back to you for some details about the code though. Kind regards, ...Louis -- Louis Bouchard Backline Support Analyst Canonical Ltd Ubuntu support: http://landscape.canonical.com
