linux-kernel - Re: [RFC 00/12] module: avoid userspace pressure on unwanted allocations

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Date:   Mon, 20 Mar 2023 14:27:17 -0700
From:   Luis Chamberlain <mcgrof@...nel.org>
To:     David Hildenbrand <david@...hat.com>,
        Adam Manzanares <a.manzanares@...sung.com>
Cc:     linux-modules@...r.kernel.org, linux-kernel@...r.kernel.org,
        pmladek@...e.com, petr.pavlu@...e.com, prarit@...hat.com,
        christophe.leroy@...roup.eu, song@...nel.org,
        torvalds@...ux-foundation.org
Subject: Re: [RFC 00/12] module: avoid userspace pressure on unwanted
 allocations

On Mon, Mar 20, 2023 at 02:23:36PM -0700, Luis Chamberlain wrote:
> On Mon, Mar 20, 2023 at 10:15:23PM +0100, David Hildenbrand wrote:
> > Not able to reproduce with 20230319-module-alloc-opts so far (2 tries).
> 
> Oh wow, so to clarify, it boots OK?
> 

Now that we know that tree works, I'm curious also now if you can
confirm just re-ordering the patches still works (it should)

https://git.kernel.org/pub/scm/linux/kernel/git/mcgrof/linux.git/log/?h=20230319-module-alloc-opts-adjust

And although it's *probably* just noise, but I'm very curious how much,
if any difference there is if you just revert "module: use
list_add_tail_rcu() when adding module".

The data on that commit log is pretty small as I have a low end system,
and I'm not yet done beating the hell out of a system with stress-ng,
but getting some data froma  pretty large system would be great.
Specially if this series seems to prove fixing boot on them.

  Luis