Kdump fails to produce a vmcore file on systems
running Oracle Linux 6 and using an Oracle NVMe PCIe 3.0 Switch Card V2
On a system running Oracle Linux 6, after a crash is triggered,
kdump fails to generate a
vmcore file if it is configured to dump the
file to an NVMe device that is connected to an Oracle NVMe PCIe
3.0 Switch Card V2, and the system is running UEK R4U6 or
later.
As a workaround, check that the NVMe solid-state drive (SSD)
works by adding the pci_aspm=off kernel
option to the KDUMP_COMMANDLINE_APPEND
variable in /etc/sysconfig/kdump.
As an alternate workaround, consider using Oracle Linux 7. (Bug ID 27642801)