linux-kernel - Re: [PATCH 2/2] genirq: proc: fix a procfs entry leak

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Message-ID: <2023111440-stray-uncloak-484c@gregkh>
Date:   Tue, 14 Nov 2023 07:27:57 -0500
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     Bartosz Golaszewski <brgl@...ev.pl>
Cc:     Thomas Gleixner <tglx@...utronix.de>, linux-kernel@...r.kernel.org,
        Bartosz Golaszewski <bartosz.golaszewski@...aro.org>,
        Marc Zyngier <maz@...nel.org>,
        Linus Walleij <linus.walleij@...aro.org>,
        Wolfram Sang <wsa@...nel.org>
Subject: Re: [PATCH 2/2] genirq: proc: fix a procfs entry leak

On Mon, Nov 13, 2023 at 09:53:47PM +0100, Bartosz Golaszewski wrote:
> On Fri, Sep 15, 2023 at 9:50 PM Bartosz Golaszewski <brgl@...ev.pl> wrote:
> >
> 
> [snip]
> 
> >
> > My point is: the same rule should apply to in-kernel consumers. When
> > they request a resource, they get a reference to it. The resource is
> > managed by its provider. If the provider is going down, it frees the
> > resource. The consumer tries to use it -> it gets an error. I'm not
> > convinced by the life-time rules argument. The consumer is not
> > CREATING a resource. It's REQUESTING it for usage. IMO this means it
> > REFERENCES it, not OWNS it. And so is only responsible for putting the
> > reference.
> >
> > Bartosz
> >
> 
> Hi Thomas, Greg et al,
> 
> I am at LPC and will present a talk on Wednesday 5:15pm at the kernel
> summit about object life-time issues. I'll reference this problem
> among others. Please consider it in your schedules, I think it'll be
> useful to discuss it in person as it's a generic problem in many
> driver subsystems.

Sounds great, I'll try to make it there!

greg k-h