On Thu, Mar 16, 2023 at 04:55:31PM -0700, Luis Chamberlain wrote:

On Wed, Mar 15, 2023 at 05:41:53PM +0100, David Hildenbrand wrote:

quoted

I expect to have a machine (with a crazy number of CPUs/devices) available
in a couple of days (1-2), so no need to rush.

The original machine I was able to reproduce with is blocked for a little
bit longer; so I hope the alternative I looked up will similarly trigger the
issue easily.

OK give this a spin:

https://git.kernel.org/pub/scm/linux/kernel/git/mcgrof/linux.git/log/?h=20230316-module-alloc-opts

I'm seeing about ~86 MiB saving on the upper bound on memory usage
while hammering on kmod test 0008, and this is on a small system.

Probably won't help *that* much but am curious... if it helps somewhat.

How much cpu count BTW?

  Luis