Re: Linux kernel: delay before power-off

[Mike Cloaked <mike.cloaked@xxxxxxxxx>]

On Mon, Jan 23, 2023 at 6:05 PM Genes Lists <lists@xxxxxxxxxxxx> wrote:

For what it's worth - on a machine with nvme I don't see
shutdown_timeout in either

$ ls /sys/module/nvme/parameters/
or
$ modinfo nvme

So that's mildly interesting :)
Not that it matters here, but I build nvme into my kernels rather than
as a dynamic loaded module like arch kernels do.

Interesting on the loaded modules, since there are both nvme and nvme_core, if you do:

$ modinfo nvme | grep timeout
$

Nothing - but if you do:

$ modinfo nvme_core | grep timeout
parm:           admin_timeout:timeout in seconds for admin commands (uint)
parm:           io_timeout:timeout in seconds for I/O (uint)
parm:           shutdown_timeout:timeout in seconds for controller shutdown (byte)
parm:           apst_primary_timeout_ms:primary APST timeout in ms (ulong)
parm:           apst_secondary_timeout_ms:secondary APST timeout in ms (ulong)

it does have the shutdown timeout parameter. 

So presumably nvme_core.shutdown_timeout is the right way to set a value, either as command line option (needed when nvme is builtin)
or using a file as /etc/modprobe.d/xxx if dynamic loaded.

mike

--

mike c