linux-kernel - Re: Crash with 6.6.0-rc1-rt1 and several i915 locking call traces with v6.5.2-rt8 and gnome-shell on Alder Lake laptop

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Message-ID: <ZRrMTfZsM9bv4GiF@thinkpad2021>
Date:   Mon, 2 Oct 2023 09:57:33 -0400
From:   "John B. Wyatt IV" <jwyatt@...hat.com>
To:     Sebastian Andrzej Siewior <bigeasy@...utronix.de>
Cc:     linux-rt-users@...r.kernel.org,
        LKML <linux-kernel@...r.kernel.org>,
        kernel-rts-sst <kernel-rts-sst@...hat.com>, jlelli@...hat.com
Subject: Re: Crash with 6.6.0-rc1-rt1 and several i915 locking call traces
 with v6.5.2-rt8 and gnome-shell on Alder Lake laptop

On Mon, Oct 02, 2023 at 11:45:45AM +0200, Sebastian Andrzej Siewior wrote:
> I looked at the traces in this email and they originate from a
> might_sleep() in guc_context_set_prio(). The reason is that they check
> at the atomic/interrupt state to figure out if they can sleep or not.
> Both checks don't work on RT as intended and the former has a not to not
> be used in drivers…
> 
> The snippet below should cure this. Could you test, please.
> 
> Sebastian
>

I tested this at both boot and suspend/resume. No call traces reported.

Thank you Sebastian.