linux-kernel - Re: [PATCH v3 19/30] liveupdate: luo

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Message-ID: <CA+CK2bCR84H90dZP40yFw086JP+YwH4=V0ncFfNoR8Mo5+azkA@mail.gmail.com>
Date: Tue, 26 Aug 2025 18:58:05 +0000
From: Pasha Tatashin <pasha.tatashin@...een.com>
To: Jason Gunthorpe <jgg@...dia.com>
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Subject: Re: [PATCH v3 19/30] liveupdate: luo_sysfs: add sysfs state monitoring

On Tue, Aug 26, 2025 at 4:03 PM Jason Gunthorpe <jgg@...dia.com> wrote:
>
> On Thu, Aug 07, 2025 at 01:44:25AM +0000, Pasha Tatashin wrote:
> > Introduce a sysfs interface for the Live Update Orchestrator
> > under /sys/kernel/liveupdate/. This interface provides a way for
> > userspace tools and scripts to monitor the current state of the LUO
> > state machine.
>
> Now that you have a cdev these files may be more logically placed
> under the cdev's sysfs and not under kernel? This can be done easially
> using the attribute mechanisms in the struct device.
>
> Again sort of back to my earlier point that everything should be
> logically linked to the cdev as though there could be many cdevs, even
> though there are not. It just keeps the code design more properly
> layered and understanble rather than doing something unique..

I am going to drop this patch entirely, and only rely on "luoctl
state" (see https://tinyurl.com/luoddesign) to query the state from
"/dev/liveupdate"

Pasha