linux-kernel - Re: [PATCH RT 09/10] drm/i915/gt: Queue and wait for the irq

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Date:   Wed, 24 Nov 2021 17:12:18 +0100
From:   Sebastian Andrzej Siewior <bigeasy@...utronix.de>
To:     Steven Rostedt <rostedt@...dmis.org>
Cc:     linux-kernel@...r.kernel.org,
        linux-rt-users <linux-rt-users@...r.kernel.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Carsten Emde <C.Emde@...dl.org>,
        John Kacur <jkacur@...hat.com>, Daniel Wagner <wagi@...om.org>,
        Tom Zanussi <zanussi@...nel.org>,
        "Srivatsa S . Bhat" <srivatsa@...il.mit.edu>,
        Clark Williams <williams@...hat.com>,
        Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
        bigeasy@...utronix.de
Subject: Re: [PATCH RT 09/10] drm/i915/gt: Queue and wait for the irq_work item.

On 2021-11-23 10:37:55 [-0500], Steven Rostedt wrote:
> Is there something else missing here, as this gives the following rejects in
> irq_work.c:

Yeah, there is this irq-work in v5.10-RT and this slightly different
thing that managed upstream while upstream managed to alter their code,
too  :)

Please find attached as a reply to this email the backported patches:
   [PATCH RT 1/3] irq_work: Allow irq_work_sync() to sleep if irq_work() no
   [PATCH RT 2/3] irq_work: Handle some irq_work in a per-CPU thread on
   [PATCH RT 3/3] irq_work: Also rcuwait for !IRQ_WORK_HARD_IRQ on

which apply here on top of v5.10.78-rt55.

Sebastian