linux-kernel - Re: [PATCH v4] init: Add support for rootwait timeout parameter

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Date:   Tue, 15 Aug 2023 11:35:28 +0200
From:   Christian Brauner <brauner@...nel.org>
To:     Loic Poulain <loic.poulain@...aro.org>
Cc:     Christian Brauner <brauner@...nel.org>,
        linux-kernel@...r.kernel.org, linux-doc@...r.kernel.org,
        linux-fsdevel@...r.kernel.org, hch@...radead.org,
        rdunlap@...radead.org, viro@...iv.linux.org.uk, corbet@....net
Subject: Re: [PATCH v4] init: Add support for rootwait timeout parameter

On Sun, 13 Aug 2023 10:23:49 +0200, Loic Poulain wrote:
> Add an optional timeout arg to 'rootwait' as the maximum time in
> seconds to wait for the root device to show up before attempting
> forced mount of the root filesystem.
> 
> Use case:
> In case of device mapper usage for the rootfs (e.g. root=/dev/dm-0),
> if the mapper is not able to create the virtual block for any reason
> (wrong arguments, bad dm-verity signature, etc), the `rootwait` param
> causes the kernel to wait forever. It may however be desirable to only
> wait for a given time and then panic (force mount) to cause device reset.
> This gives the bootloader a chance to detect the problem and to take some
> measures, such as marking the booted partition as bad (for A/B case) or
> entering a recovery mode.
> 
> [...]

Hmkay, let's give this some -next exposure.

---

Applied to the vfs.misc branch of the vfs/vfs.git tree.
Patches in the vfs.misc branch should appear in linux-next soon.

Please report any outstanding bugs that were missed during review in a
new review to the original patch series allowing us to drop it.

It's encouraged to provide Acked-bys and Reviewed-bys even though the
patch has now been applied. If possible patch trailers will be updated.

Note that commit hashes shown below are subject to change due to rebase,
trailer updates or similar. If in doubt, please check the listed branch.

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs.git
branch: vfs.misc

[1/1] init: Add support for rootwait timeout parameter
      https://git.kernel.org/vfs/vfs/c/3b0086ced97f