On 2020-02-17, Petr Mladek <pmladek@xxxxxxxx> wrote: >>> Should the "prb"(printk tb static) symbol be exported into >>> vmcoreinfo? Otherwise, do you happen to know how to walk through >>> the log_buf and get all kernel logs from vmcore? >> >> You are correct. This will need to be exported as well so that the >> descriptors can be accessed. (log_buf is only the pure human-readable >> text.) I am currently hacking the crash tool to see exactly what >> needs to be made available in order to access all the data of the >> ringbuffer. > > I am not sure which parts you are working on. Are you going to provide > also patch for makedumpfile, please? I'm working on crash first. makedumpfile is on my list as well. > I get the following failure when creating the crashdump using: > > echo c >/proc/sysrq-trigger > > > The kernel version is not supported. > The makedumpfile operation may be incomplete. > dump_dmesg: Can't find variable-length record symbols > makedumpfile Failed. > Running makedumpfile --dump-dmesg /proc/vmcore failed (1). Yes, the symbols have changed (and some are missing). I will get this sorted out for v2. And I will provide some heavily hacked code for crash and makedumpfile to show that the necessary symbols are there and it works. John Ogness _______________________________________________ kexec mailing list kexec@xxxxxxxxxxxxxxxxxxx http://lists.infradead.org/mailman/listinfo/kexec
