From: Rudi Heitbaum <rudi@heitbaum.com>
To: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Johan Hovold <johan@kernel.org>,
Luis Chamberlain <mcgrof@kernel.org>,
Lucas De Marchi <lucas.demarchi@intel.com>,
Petr Pavlu <petr.pavlu@suse.com>,
gregkh@linuxfoundation.org, rafael@kernel.org, song@kernel.org,
lucas.de.marchi@gmail.com, christophe.leroy@csgroup.eu,
peterz@infradead.org, rppt@kernel.org, dave@stgolabs.net,
willy@infradead.org, vbabka@suse.cz, mhocko@suse.com,
dave.hansen@linux.intel.com, colin.i.king@gmail.com,
jim.cromie@gmail.com, catalin.marinas@arm.com, jbaron@akamai.com,
rick.p.edgecombe@intel.com, yujie.liu@intel.com,
david@redhat.com, tglx@linutronix.de, hch@lst.de,
patches@lists.linux.dev, linux-modules@vger.kernel.org,
linux-mm@kvack.org, linux-kernel@vger.kernel.org,
pmladek@suse.com, prarit@redhat.com, lennart@poettering.net,
imre.deak@intel.com
Subject: Re: [PATCH 2/2] module: add support to avoid duplicates early on load
Date: Sun, 4 Jun 2023 14:26:12 +0000 [thread overview]
Message-ID: <ZHyfBLbZCE4cUMdV@80e1dc6c40da> (raw)
In-Reply-To: <CAHk-=wg7ihygotpO9x5a6QJO5oAom9o91==L_Kx-gUHvRYuXiQ@mail.gmail.com>
On Mon, May 29, 2023 at 09:55:15PM -0400, Linus Torvalds wrote:
> On Mon, May 29, 2023 at 11:18 AM Johan Hovold <johan@kernel.org> wrote:
> >
> > I took a closer look at some of the modules that failed to load and
> > noticed a pattern in that they have dependencies that are needed by more
> > than one device.
>
> Ok, this is a "maybe something like this" RFC series of two patches -
> one trivial one to re-organize things a bit so that we can then do the
> real one which uses a filter based on the inode pointer to return an
> "idempotent return value" for module loads that share the same inode.
>
> It's entirely untested, and since I'm on the road I'm going to not
> really be able to test it. It compiles for me, and the code looks
> fairly straightforward, but it's probably buggy.
The updated patches fix the issue experienced with 6.4-rc4 where the Intel
NUC12 booted fine, but on media playback resulted in the video stuttering,
then freezing - and that audio was not coming though.
# diff modules-rc4 modules-rc4-patched
< snd_hda_codec_hdmi 77824 0
< snd_hda_codec_realtek 159744 0
---
> snd_hda_codec_hdmi 77824 1
> snd_hda_codec_realtek 159744 1
Revert "module: error out early on concurrent load of the same module file"
module: split up 'finit_module()' into init_module_from_file() helper
modules: catch concurrent module loads, take two
Johan's fix:
-static struct spinlock idem_lock;
+static DEFINE_SPINLOCK(idem_lock);
Tested-by: Rudi Heitbaum <rudi@heitbaum..com>
next prev parent reply other threads:[~2023-06-04 14:26 UTC|newest]
Thread overview: 53+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-05-24 21:36 [PATCH 0/2] module: avoid all memory pressure due to duplicates Luis Chamberlain
2023-05-24 21:36 ` [PATCH 1/2] fs/kernel_read_file: add support for duplicate detection Luis Chamberlain
2023-05-24 21:52 ` Linus Torvalds
2023-05-24 21:56 ` Linus Torvalds
2023-05-24 22:07 ` Luis Chamberlain
2023-05-25 4:00 ` Linus Torvalds
2023-05-25 18:08 ` Luis Chamberlain
2023-05-25 18:35 ` Luis Chamberlain
2023-05-25 18:50 ` Linus Torvalds
2023-05-25 19:32 ` Luis Chamberlain
2023-05-25 7:01 ` Christian Brauner
2023-05-24 21:36 ` [PATCH 2/2] module: add support to avoid duplicates early on load Luis Chamberlain
2023-05-25 11:40 ` Petr Pavlu
2023-05-25 16:07 ` Linus Torvalds
2023-05-25 16:42 ` Greg KH
2023-05-25 18:22 ` Luis Chamberlain
2023-05-25 17:52 ` Linus Torvalds
2023-05-25 18:45 ` Lucas De Marchi
2023-05-25 21:12 ` Linus Torvalds
2023-05-25 22:02 ` Luis Chamberlain
2023-05-26 1:39 ` Linus Torvalds
2023-05-29 8:58 ` Johan Hovold
2023-05-29 11:00 ` Linus Torvalds
2023-05-29 12:44 ` Johan Hovold
2023-05-29 15:18 ` Johan Hovold
2023-05-30 1:55 ` Linus Torvalds
2023-05-30 9:40 ` Johan Hovold
2023-06-05 12:25 ` Johan Hovold
2023-05-30 16:22 ` Luis Chamberlain
2023-05-30 17:16 ` Lucas De Marchi
2023-05-30 19:41 ` Luis Chamberlain
2023-05-30 22:17 ` Linus Torvalds
2023-05-31 5:30 ` Lucas De Marchi
2023-05-31 0:31 ` Luis Chamberlain
2023-05-31 7:51 ` David Hildenbrand
2023-05-31 16:57 ` Luis Chamberlain
2023-06-02 15:19 ` David Hildenbrand
2023-06-02 16:04 ` Luis Chamberlain
2023-06-05 11:26 ` David Hildenbrand
2023-06-05 15:17 ` Luis Chamberlain
2023-06-05 15:28 ` Luis Chamberlain
2023-06-28 18:52 ` Luis Chamberlain
2023-06-28 20:14 ` Linus Torvalds
2023-06-28 22:07 ` Linus Torvalds
2023-06-28 23:17 ` Linus Torvalds
2023-06-29 0:18 ` Luis Chamberlain
2023-06-02 16:06 ` Linus Torvalds
2023-06-02 16:37 ` David Hildenbrand
2023-05-30 22:45 ` Dan Williams
2023-06-04 14:26 ` Rudi Heitbaum [this message]
2023-05-29 17:47 ` Linus Torvalds
2023-05-30 10:01 ` Johan Hovold
2023-05-25 16:54 ` Lucas De Marchi
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