On 2020-07-02, lijiang <liji...@redhat.com> wrote: > About the VMCOREINFO part, I made some tests based on the kernel patch > v3, the makedumpfile and crash-utility can work as expected with your > patch(userspace patch), but, unfortunately, the > vmcore-dmesg(kexec-tools) can't correctly read the printk ring buffer > information, and get the following error: > > "Missing the log_buf symbol" > > The kexec-tools(vmcore-dmesg) should also have a similar patch, just like > in the makedumpfile and crash-utility.
A patched kexec-tools is available here [0]. I did not test using 32-bit dumps on 64-bit machines and vice versa. But it should work. John Ogness [0] https://github.com/Linutronix/kexec-tools.git (printk branch)
