Messages in this thread | | | From | Akinobu Mita <> | Date | Fri, 3 May 2019 12:38:08 +0900 | Subject | Re: [PATCH 0/4] nvme-pci: support device coredump |
| |
2019年5月2日(木) 22:03 Keith Busch <keith.busch@intel.com>: > > On Thu, May 02, 2019 at 05:59:17PM +0900, Akinobu Mita wrote: > > This enables to capture snapshot of controller information via device > > coredump machanism, and it helps diagnose and debug issues. > > > > The nvme device coredump is triggered before resetting the controller > > caused by I/O timeout, and creates the following coredump files. > > > > - regs: NVMe controller registers, including each I/O queue doorbell > > registers, in nvme-show-regs style text format. > > You're supposed to treat queue doorbells as write-only. Spec says: > > The host should not read the doorbell registers. If a doorbell register > is read, the value returned is vendor specific.
OK. I'll exclude the doorbell registers from register dump. It will work out without the information if we have snapshot of the queues.
| |