From: Danny Milosavljevic <dannym@scratchpost.org>
To: "Ludovic Courtès" <ludo@gnu.org>
Cc: 30604@debbugs.gnu.org
Subject: [bug#30604] [PATCH v10 5/6] linux-initrd: Provide our own 'modprobe' program.
Date: Tue, 13 Mar 2018 10:27:06 +0100 [thread overview]
Message-ID: <20180313100539.442c4aa9@scratchpost.org> (raw)
In-Reply-To: <87h8plkkkc.fsf@gnu.org>
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Hi Ludo,
On Mon, 12 Mar 2018 23:14:59 +0100
ludo@gnu.org (Ludovic Courtès) wrote:
> > One of the devnames created statically is the one for btrfs, so not writing or
> > using devnames is not going to end well.
>
> We’re fine because btrfs, 9p, overlay, etc. all have an “fs-btrfs”,
> “fs-9p”, etc. alias, which shows up in “modules.alias”. No need for
> “modules.devname” AFAICS.
The other filesystems are not such a problem - but BTRFS has its own snapshotting/
multivolume functionality - and it's possible that someone accesses /dev/btrfs-control
"too early" for that.
I applied your patches to a fresh clone of guix master now, ran the btrfs-root-os
system check, and indeed I get (tried two rounds, happened both times):
$ make TESTS=btrfs-root-os check-system
[...]
Scanning for Btrfs filesystems
WARNING: failed to open /dev/btrfs-control, skipping device registration: No suy
ERROR: there are 1 errors while registering devices
File system check on /dev/vda2 failed; spawning Bourne-like REPL
GNU Guile 2.2.3
Copyright (C) 1995-2017 Free Software Foundation, Inc.
Guile comes with ABSOLUTELY NO WARRANTY; for details type `,show w'.
This program is free software, and you are welcome to redistribute it
under certain conditions; type `,show c' for details.
Enter `,help' for help.
(can't evaluate anything here)
> > (I'd also copy the modules.builtin (from Linux).
> > Also, what happens if we load a module which has as dependency a builtin?
> > Will we try to load the builtin as a .ko file and fail the entire thing?)
>
> The dependency of a builtin is necessarily a builtin,
Yes.
>and the kernel won’t invoke modprobe for a builtin, will it?
I've read Linux's __request_module and I can't find where they
pre-check anything - neither whether there's already a builtin
nor whether it's loaded already.
They probably don't check. But I'll read it again, more carefully...
(request_module isn't that popular so it makes sense for them not to complicate
the kernel by these checks when there are like 8 callers in total - and all on init)
>Thanks for the insightful review!
You're welcome :)
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next prev parent reply other threads:[~2018-03-13 9:28 UTC|newest]
Thread overview: 132+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-02-25 11:45 [bug#30604] [PATCH 0/4] Load Linux module only when supported hardware is present Danny Milosavljevic
2018-02-25 11:48 ` [bug#30604] [PATCH 1/4] gnu: kmod: Split off kmod-minimal Danny Milosavljevic
2018-02-25 11:48 ` [bug#30604] [PATCH 2/4] gnu: Add kmod-minimal-static Danny Milosavljevic
2018-02-25 11:48 ` [bug#30604] [PATCH 3/4] linux-initrd: Add kmod Danny Milosavljevic
2018-02-25 14:05 ` Mathieu Othacehe
2018-02-25 15:07 ` Danny Milosavljevic
2018-02-26 11:51 ` Mathieu Othacehe
2018-02-25 11:48 ` [bug#30604] [PATCH 4/4] linux-boot: Load kernel modules only when the hardware is present Danny Milosavljevic
2018-02-26 1:10 ` [bug#30604] [PATCH 1/4] gnu: kmod: Split off kmod-minimal Marius Bakke
2018-02-26 3:50 ` [bug#30604] [PATCH v2 0/6] Load Linux module only when supported hardware is present Danny Milosavljevic
2018-02-26 3:50 ` [bug#30604] [PATCH v2 1/6] gnu: kmod: Split off kmod-minimal Danny Milosavljevic
2018-02-26 3:50 ` [bug#30604] [PATCH v2 2/6] gnu: Add kmod-minimal-static Danny Milosavljevic
2018-02-26 3:50 ` [bug#30604] [PATCH v2 3/6] linux-initrd: Add kmod Danny Milosavljevic
2018-02-26 3:50 ` [bug#30604] [PATCH v2 4/6] linux-boot: Load kernel modules only when the hardware is present Danny Milosavljevic
2018-02-26 3:50 ` [bug#30604] [PATCH v2 5/6] vm: Allow qemu-image builder to load Linux kernel modules Danny Milosavljevic
2018-02-26 3:50 ` [bug#30604] [PATCH v2 6/6] vm: Make the virtio-blk is uniquely identifyable in /sys Danny Milosavljevic
2018-02-26 4:06 ` [bug#30604] [PATCH v3 0/6] Load Linux module only when supported hardware is present Danny Milosavljevic
2018-02-26 4:06 ` [bug#30604] [PATCH v3 1/6] gnu: kmod: Split off kmod-minimal Danny Milosavljevic
2018-02-26 4:06 ` [bug#30604] [PATCH v3 2/6] gnu: Add kmod-minimal-static Danny Milosavljevic
2018-02-26 4:06 ` [bug#30604] [PATCH v3 3/6] linux-initrd: Add kmod Danny Milosavljevic
2018-02-26 4:06 ` [bug#30604] [PATCH v3 4/6] linux-boot: Load kernel modules only when the hardware is present Danny Milosavljevic
2018-02-27 14:26 ` Ludovic Courtès
2018-02-26 4:06 ` [bug#30604] [PATCH v3 5/6] vm: Allow qemu-image builder to load Linux kernel modules Danny Milosavljevic
2018-02-26 4:06 ` [bug#30604] [PATCH v3 6/6] vm: Make the virtio-blk is uniquely identifyable in /sys Danny Milosavljevic
2018-02-27 11:26 ` [bug#30604] [PATCH v4 0/7] Load Linux module only when supported hardware is present Danny Milosavljevic
2018-02-27 11:26 ` [bug#30604] [PATCH v4 1/7] gnu: kmod: Split off kmod-minimal Danny Milosavljevic
2018-02-27 11:26 ` [bug#30604] [PATCH v4 2/7] gnu: Add kmod-minimal-static Danny Milosavljevic
2018-02-27 11:26 ` [bug#30604] [PATCH v4 3/7] linux-initrd: Add kmod Danny Milosavljevic
2018-02-27 11:26 ` [bug#30604] [PATCH v4 4/7] linux-boot: Load kernel modules only when the hardware is present Danny Milosavljevic
2018-02-27 11:26 ` [bug#30604] [PATCH v4 5/7] vm: Allow qemu-image builder to load Linux kernel modules Danny Milosavljevic
2018-02-27 11:26 ` [bug#30604] [PATCH v4 6/7] vm: Make the virtio-blk uniquely identifyable in /sys Danny Milosavljevic
2018-02-27 11:26 ` [bug#30604] [PATCH v4 7/7] linux-boot: Call make-static-device-nodes much earlier Danny Milosavljevic
2018-02-27 15:50 ` [bug#30604] [PATCH v5 0/7] Load Linux module only when supported hardware is present Danny Milosavljevic
2018-02-27 15:50 ` [bug#30604] [PATCH v5 1/7] gnu: kmod: Split off kmod-minimal Danny Milosavljevic
2018-02-27 15:50 ` [bug#30604] [PATCH v5 2/7] gnu: Add kmod-minimal-static Danny Milosavljevic
2018-02-27 15:50 ` [bug#30604] [PATCH v5 3/7] linux-initrd: Add kmod Danny Milosavljevic
2018-02-27 15:50 ` [bug#30604] [PATCH v5 4/7] linux-boot: Load kernel modules only when the hardware is present Danny Milosavljevic
2018-02-27 15:50 ` [bug#30604] [PATCH v5 5/7] vm: Allow qemu-image builder to load Linux kernel modules Danny Milosavljevic
2018-02-27 15:50 ` [bug#30604] [PATCH v5 6/7] vm: Make the virtio-blk is uniquely identifyable in /sys Danny Milosavljevic
2018-02-27 15:50 ` [bug#30604] [PATCH v5 7/7] linux-boot: Call make-static-device-nodes much earlier Danny Milosavljevic
2018-03-02 14:16 ` [bug#30604] [PATCH v6 0/6] Load Linux module only when supported hardware is present Danny Milosavljevic
2018-03-02 14:17 ` [bug#30604] [PATCH v6 1/6] linux-modules: Add module-aliases Danny Milosavljevic
2018-03-02 14:17 ` [bug#30604] [PATCH v6 2/6] linux-modules: Add install-modules Danny Milosavljevic
2018-03-02 14:17 ` [bug#30604] [PATCH v6 3/6] linux-boot: Load kernel modules only when the hardware is present Danny Milosavljevic
2018-03-02 14:17 ` [bug#30604] [PATCH v6 4/6] vm: Allow qemu-image builder to load Linux kernel modules Danny Milosavljevic
2018-03-02 14:17 ` [bug#30604] [PATCH v6 5/6] vm: Make the virtio-blk uniquely identifiable in /sys Danny Milosavljevic
2018-03-02 14:17 ` [bug#30604] [PATCH v6 6/6] linux-initrd: Provide modprobe to the initrd Danny Milosavljevic
2018-03-02 15:34 ` [bug#30604] [PATCH v7 0/6] Load Linux module only when supported hardware is present Danny Milosavljevic
2018-03-02 15:34 ` [bug#30604] [PATCH v7 1/6] linux-modules: Add module-aliases Danny Milosavljevic
2018-03-02 16:47 ` Danny Milosavljevic
2018-03-02 15:34 ` [bug#30604] [PATCH v7 2/6] linux-modules: Add install-modules Danny Milosavljevic
2018-03-02 15:34 ` [bug#30604] [PATCH v7 3/6] linux-boot: Load kernel modules only when the hardware is present Danny Milosavljevic
2018-03-02 16:47 ` Danny Milosavljevic
2018-03-02 15:34 ` [bug#30604] [PATCH v7 4/6] vm: Allow qemu-image builder to load Linux kernel modules Danny Milosavljevic
2018-03-02 15:34 ` [bug#30604] [PATCH v7 5/6] vm: Make the virtio-blk uniquely identifiable in /sys Danny Milosavljevic
2018-03-02 15:34 ` [bug#30604] [PATCH v7 6/6] linux-initrd: Provide modprobe to the initrd Danny Milosavljevic
2018-03-03 13:55 ` [bug#30604] [PATCH v8 0/7] Load Linux module only when supported hardware is present Danny Milosavljevic
2018-03-03 13:55 ` [bug#30604] [PATCH v8 1/7] linux-modules: Add module-aliases Danny Milosavljevic
2018-03-03 21:58 ` Ludovic Courtès
2018-03-03 13:55 ` [bug#30604] [PATCH v8 2/7] linux-modules: Add install-modules Danny Milosavljevic
2018-03-03 15:32 ` Danny Milosavljevic
2018-03-03 22:07 ` Ludovic Courtès
2018-03-04 12:45 ` Danny Milosavljevic
2018-03-04 12:53 ` Danny Milosavljevic
2018-03-03 13:55 ` [bug#30604] [PATCH v8 3/7] linux-boot: Load kernel modules only when the hardware is present Danny Milosavljevic
2018-03-03 22:48 ` Ludovic Courtès
2018-03-04 1:06 ` Danny Milosavljevic
2018-03-04 1:54 ` Danny Milosavljevic
2018-03-04 12:34 ` Danny Milosavljevic
2018-03-09 22:06 ` Ludovic Courtès
2018-03-09 22:13 ` Danny Milosavljevic
2018-03-09 22:19 ` Danny Milosavljevic
2018-03-09 22:44 ` Danny Milosavljevic
2018-03-12 12:38 ` Ludovic Courtès
2018-03-12 12:39 ` [bug#30604] [PATCH v10 1/6] linux-modules: Add "modules.alias" writer Ludovic Courtès
2018-03-12 12:39 ` [bug#30604] [PATCH v10 2/6] linux-modules: Add 'load-linux-modules-from-directory' Ludovic Courtès
2018-03-12 19:26 ` Danny Milosavljevic
2018-03-12 12:39 ` [bug#30604] [PATCH v10 3/6] linux-modules: Add 'load-needed-linux-modules' Ludovic Courtès
2018-03-12 19:40 ` Danny Milosavljevic
2018-03-12 21:10 ` Ludovic Courtès
2018-03-12 12:39 ` [bug#30604] [PATCH v10 4/6] vm: Make the virtio-blk uniquely identifiable in /sys Ludovic Courtès
2018-03-12 12:39 ` [bug#30604] [PATCH v10 5/6] linux-initrd: Provide our own 'modprobe' program Ludovic Courtès
2018-03-12 20:09 ` Danny Milosavljevic
2018-03-12 21:12 ` Danny Milosavljevic
2018-03-13 8:54 ` Ludovic Courtès
2018-03-12 22:14 ` Ludovic Courtès
2018-03-12 22:15 ` [bug#30604] [PATCH v11 1/6] linux-modules: Add "modules.alias" writer Ludovic Courtès
2018-03-12 22:15 ` [bug#30604] [PATCH v11 2/6] linux-modules: Add 'load-linux-modules-from-directory' Ludovic Courtès
2018-03-12 22:48 ` Danny Milosavljevic
2018-03-12 22:15 ` [bug#30604] [PATCH v11 3/6] linux-modules: Add 'load-needed-linux-modules' Ludovic Courtès
2018-03-12 23:00 ` Danny Milosavljevic
2018-03-13 8:55 ` Ludovic Courtès
2018-03-12 22:15 ` [bug#30604] [PATCH v11 4/6] vm: Make the virtio-blk uniquely identifiable in /sys Ludovic Courtès
2018-03-12 22:49 ` Danny Milosavljevic
2018-03-12 22:15 ` [bug#30604] [PATCH v11 5/6] linux-initrd: Provide our own 'modprobe' program Ludovic Courtès
2018-03-13 8:50 ` Ludovic Courtès
2018-03-13 9:28 ` Ludovic Courtès
2018-03-13 12:28 ` Danny Milosavljevic
2018-03-12 22:15 ` [bug#30604] [PATCH v11 6/6] linux-modules: Add "modules.devname" writer Ludovic Courtès
2018-03-12 22:55 ` Danny Milosavljevic
2018-03-13 8:56 ` Ludovic Courtès
2018-03-12 22:48 ` [bug#30604] [PATCH v11 1/6] linux-modules: Add "modules.alias" writer Danny Milosavljevic
2018-03-13 9:27 ` Danny Milosavljevic [this message]
2018-03-13 10:51 ` [bug#30604] [PATCH v10 5/6] linux-initrd: Provide our own 'modprobe' program Ludovic Courtès
2018-03-13 12:05 ` Danny Milosavljevic
2018-03-13 19:17 ` Danny Milosavljevic
2018-03-12 12:39 ` [bug#30604] [PATCH v10 6/6] linux-modules: Add "modules.devname" writer Ludovic Courtès
2018-03-12 19:54 ` [bug#30604] [PATCH v10 1/6] linux-modules: Add "modules.alias" writer Danny Milosavljevic
2018-03-12 21:13 ` Ludovic Courtès
2018-03-09 22:36 ` [bug#30604] [PATCH v8 3/7] linux-boot: Load kernel modules only when the hardware is present Danny Milosavljevic
2018-03-03 13:55 ` [bug#30604] [PATCH v8 4/7] vm: Allow qemu-image builder to load Linux kernel modules Danny Milosavljevic
2018-03-03 13:55 ` [bug#30604] [PATCH v8 5/7] vm: Make the virtio-blk uniquely identifiable in /sys Danny Milosavljevic
2018-03-03 13:55 ` [bug#30604] [PATCH v8 6/7] linux-initrd: Provide modprobe to the initrd Danny Milosavljevic
2018-03-03 13:55 ` [bug#30604] [PATCH v8 7/7] linux-initrd: Factorize %modprobe and flat-linux-module-directory Danny Milosavljevic
2018-03-03 18:01 ` Danny Milosavljevic
2018-03-04 1:09 ` [bug#30604] [PATCH v9 0/7] Load Linux module only when supported hardware is present Danny Milosavljevic
2018-03-04 1:09 ` [bug#30604] [PATCH v9 1/7] linux-modules: Add "modules.devname" and "modules.alias" writer Danny Milosavljevic
2018-03-04 1:09 ` [bug#30604] [PATCH v9 2/7] linux-modules: Add module-aliases->module-file-names Danny Milosavljevic
2018-03-04 1:09 ` [bug#30604] [PATCH v9 3/7] linux-initrd: Provide pure-Guile modprobe Danny Milosavljevic
2018-03-11 20:24 ` Danny Milosavljevic
2018-03-12 14:45 ` Ludovic Courtès
2018-03-12 17:51 ` Danny Milosavljevic
2018-03-04 1:09 ` [bug#30604] [PATCH v9 4/7] linux-boot: Load kernel modules only when the hardware is present Danny Milosavljevic
2018-03-04 1:09 ` [bug#30604] [PATCH v9 5/7] vm: Allow qemu-image builder to load Linux kernel modules Danny Milosavljevic
2018-03-04 1:09 ` [bug#30604] [PATCH v9 6/7] vm: Make the virtio-blk uniquely identifiable in /sys Danny Milosavljevic
2018-03-04 1:09 ` [bug#30604] [PATCH v9 7/7] linux-initrd: Use module-aliases->module-file-names, too Danny Milosavljevic
2018-03-09 22:26 ` Danny Milosavljevic
2018-03-18 15:03 ` [bug#30604] Keyboard detection before ‘cryptsetup’ runs Ludovic Courtès
2018-03-23 13:02 ` Danny Milosavljevic
2018-03-23 15:07 ` Danny Milosavljevic
2018-03-24 17:07 ` Ludovic Courtès
2018-03-24 17:12 ` Ludovic Courtès
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