linux-kernel - Re: [RFC PATCH] drm/i915: Don't panic on non-empty list of free cachelines

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Message-ID: <155446684177.8259.3979238916498240519@skylake-alporthouse-com>
Date:   Fri, 05 Apr 2019 13:20:41 +0100
From:   Chris Wilson <chris@...is-wilson.co.uk>
To:     Jani Nikula <jani.nikula@...ux.intel.com>,
        Janusz Krzysztofik <janusz.krzysztofik@...ux.intel.com>,
        Joonas Lahtinen <joonas.lahtinen@...ux.intel.com>,
        Rodrigo Vivi <rodrigo.vivi@...el.com>
Cc:     David Airlie <airlied@...ux.ie>, Daniel Vetter <daniel@...ll.ch>,
        michal.wajdeczko@...el.com, intel-gfx@...ts.freedesktop.org,
        dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
        Janusz Krzysztofik <janusz.krzysztofik@...el.com>
Subject: Re: [RFC PATCH] drm/i915: Don't panic on non-empty list of free cachelines

Quoting Janusz Krzysztofik (2019-04-05 13:13:31)
> From: Janusz Krzysztofik <janusz.krzysztofik@...el.com>
> 
> If there are active users of a device during driver unbind, the driver
> now panics on non-empty list of free cachelines.

This panic is there to say that fini is being called with active
contexts, that it is being called too early. Those requests should be
cleaned up first, unpinning the contexts and resources, and so letting
the timeline be freed.
-Chris