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From: Luis Chamberlain <mcgrof@kernel.org>
To: David Hildenbrand <david@redhat.com>
Cc: linux-modules@vger.kernel.org, linux-kernel@vger.kernel.org,
	pmladek@suse.com, petr.pavlu@suse.com, prarit@redhat.com,
	christophe.leroy@csgroup.eu, song@kernel.org,
	torvalds@linux-foundation.org
Subject: Re: [RFC 00/12] module: avoid userspace pressure on unwanted allocations
Date: Thu, 16 Mar 2023 16:56:56 -0700	[thread overview]
Message-ID: <ZBOsyBu68d4vh6yU@bombadil.infradead.org> (raw)
In-Reply-To: <ZBOsc8dc0Mhvh/vv@bombadil.infradead.org>

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:
> > 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

  reply	other threads:[~2023-03-16 23:56 UTC|newest]

Thread overview: 47+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-03-11  5:17 [RFC 00/12] module: avoid userspace pressure on unwanted allocations Luis Chamberlain
2023-03-11  5:17 ` [RFC 01/12] module: use goto errors on check_modinfo() and layout_and_allocate() Luis Chamberlain
2023-03-11  5:17 ` [RFC 02/12] module: move get_modinfo() helpers all above Luis Chamberlain
2023-03-11  5:17 ` [RFC 03/12] module: rename next_string() to module_next_tag_pair() Luis Chamberlain
2023-03-11  5:17 ` [RFC 04/12] module: add a for_each_modinfo_entry() Luis Chamberlain
2023-03-11  5:17 ` [RFC 05/12] module: add debugging alias parsing support Luis Chamberlain
2023-03-11  5:17 ` [RFC 06/12] module: move early sanity checks into a helper Luis Chamberlain
2023-03-11  5:17 ` [RFC 07/12] module: move check_modinfo() early to early_mod_check() Luis Chamberlain
2023-03-11  5:17 ` [RFC 08/12] module: move finished_loading() Luis Chamberlain
2023-03-11  5:17 ` [RFC 09/12] module: extract patient module check into helper Luis Chamberlain
2023-03-11  5:17 ` [RFC 10/12] module: avoid allocation if module is already present and ready Luis Chamberlain
2023-03-11  5:17 ` [RFC 11/12] module: use list_add_tail_rcu() when adding module Luis Chamberlain
2023-03-11  5:17 ` [RFC 12/12] module: use aliases to find module on find_module_all() Luis Chamberlain
2023-03-11 13:12   ` kernel test robot
2023-03-11 17:06   ` kernel test robot
2023-03-15 14:43   ` Petr Pavlu
2023-03-15 16:12     ` Luis Chamberlain
2023-03-15 12:24 ` [RFC 00/12] module: avoid userspace pressure on unwanted allocations David Hildenbrand
2023-03-15 16:10   ` Luis Chamberlain
2023-03-15 16:41     ` David Hildenbrand
2023-03-16 23:55       ` Luis Chamberlain
2023-03-16 23:56         ` Luis Chamberlain [this message]
2023-03-18  0:11           ` Luis Chamberlain
2023-03-20  9:38             ` David Hildenbrand
2023-03-20 19:40               ` David Hildenbrand
2023-03-20 21:09                 ` Luis Chamberlain
2023-03-20 21:15                   ` David Hildenbrand
2023-03-20 21:23                     ` Luis Chamberlain
2023-03-20 21:27                       ` Luis Chamberlain
2023-03-21 19:32                         ` David Hildenbrand
2023-03-24  9:27                           ` David Hildenbrand
2023-03-24 17:54                             ` Luis Chamberlain
2023-03-24 19:11                               ` Linus Torvalds
2023-03-24 19:59                                 ` Luis Chamberlain
2023-03-24 20:28                                   ` Linus Torvalds
2023-03-24 21:14                                     ` Luis Chamberlain
2023-03-24 23:27                                       ` Luis Chamberlain
2023-03-24 23:41                                         ` Linus Torvalds
2023-03-28  3:44                               ` David Hildenbrand
2023-03-28  6:16                                 ` Luis Chamberlain
2023-03-28 21:02                                   ` David Hildenbrand
2023-03-29  5:31                                     ` Luis Chamberlain
2023-03-30  4:42                                       ` David Hildenbrand
2023-03-21 15:11                       ` David Hildenbrand
2023-03-21 16:52                         ` Luis Chamberlain
2023-03-21 17:01                           ` David Hildenbrand
2023-03-20  9:37           ` David Hildenbrand

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