On Thu, Oct 26, 2017 at 2:27 AM, Guilherme G. Piccoli <gpicc...@linux.vnet.ibm.com> wrote: > During a kdump kernel boot in PowerPC, we request a reset of the PHBs > to the FW. It makes sense, since if we are booting a kdump kernel it > means we had some trouble before and we cannot rely in the adapters' > health; they could be in a bad state, hence the reset is needed. > > But this reset is useful not only in kdump - there are situations, > specially when debugging drivers, that we could break an adapter in > a way it requires such reset. One can tell to just go ahead and > reboot the machine, but happens that many times doing kexec is much > faster, and so preferable than a full power cycle. > > This patch adds the pci_reset_phbs parameter to perform such reset > when desired by the user. >
Do we care to reset specific phbs or all of them? I guess all based on your description. Balbir Singh.
