Comment 7 for bug 1746299

------- Comment From <email address hidden> 2018-02-15 06:21 EDT-------
(In reply to comment #11)
> (In reply to comment #10)
> > Hi, Hari.
> >
> > It's already in bionic. However, due to some of the changes on kpti patches,
> > it might fail to properly work, and there is no upstream makedumpfile fix in
> > the works yet, so I am debugging and working on it, so we will get something
> > that will also work for those latest kernels we have released.
> >
> > Thanks.
> > Cascardo.
>
> Thannk you cascardo for the update,
> Yes though v1.6.3 is present in 18.04 makedumpfile still fails during dump..
> ===console log===
> kernel used on Bionic is 4.13.0-32-generic
> ||/ Name Version Architecture Description
> +++-====================-===============-===============-
> =============================================
> ii makedumpfile 1:1.6.3-1 ppc64el VMcore extraction
> tool
>
> Starting Kernel crash dump capture service...
> [ 22.094036] kdump-tools[1360]: Starting kdump-tools: * running
> makedumpfile -c -d 31 /proc/vmcore /var/crash/201802150350/dump-incomplete
> Checking for memory holes : [100.0 %] |
> readpage_elf: Attempt to read non-existent page at 0x4d39b30000.
> [ 22.378312] kdump-tools[1360]: readmem: type_addr: 0,
> addr:c000004d39b37140, size:16384
> [ 22.378411] kdump-tools[1360]: __exclude_unnecessary_pages: Can't read
> the buffer of struct page.
> [ 22.378538] kdump-tools[1360]: create_2nd_bitmap: Can't exclude
> unnecessary pages.
> Checking for memory holes : [100.0 %] -
> readpage_elf: Attempt to read non-existent page at 0x4d39b30000.
> [ 22.378708] kdump-tools[1360]: readmem: type_addr: 0,
> addr:c000004d39b37140, size:16384
> [ 22.378779] kdump-tools[1360]: __exclude_unnecessary_pages: Can't read
> the buffer of struct page.
> [ 22.378853] kdump-tools[1360]: create_2nd_bitmap: Can't exclude
> unnecessary pages.
> [ 22.378924] kdump-tools[1360]: makedumpfile Failed.
> [ 22.379014] kdump-tools[1360]: * kdump-tools: makedumpfile failed,
> falling back to 'cp'

Naveed, what was the size of the vmcore saved through 'cp'? What is the total
RAM size on the system? please share the proc/device-tree info (sys.dts) on
the system it failed

$ dtc -I fs /proc/device-tree -O dts -o sys.dts

Thanks
Hari