linux-kernel - Re: [PATCH v18 07/26] drm/shmem-helper: Use refcount_t for pages_use

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Message-ID: <5ebb290e629a83f12525c2ddf0ca2082.mripard@kernel.org>
Date:   Fri, 24 Nov 2023 10:41:24 +0000
From:   "Maxime Ripard" <mripard@...nel.org>
To:     "Dmitry Osipenko" <dmitry.osipenko@...labora.com>
Cc:     dri-devel@...ts.freedesktop.org, kernel@...labora.com,
        linux-kernel@...r.kernel.org,
        virtualization@...ts.linux-foundation.org,
        "Boris Brezillon" <boris.brezillon@...labora.com>,
        "Chia-I Wu" <olvaffe@...il.com>,
        Christian König <christian.koenig@....com>,
        "Daniel Vetter" <daniel@...ll.ch>,
        "David Airlie" <airlied@...il.com>,
        "Emma Anholt" <emma@...olt.net>,
        "Gerd Hoffmann" <kraxel@...hat.com>,
        "Gurchetan Singh" <gurchetansingh@...omium.org>,
        "Maarten Lankhorst" <maarten.lankhorst@...ux.intel.com>,
        "Maxime Ripard" <mripard@...nel.org>,
        "Melissa Wen" <mwen@...lia.com>, "Qiang Yu" <yuq825@...il.com>,
        "Steven Price" <steven.price@....com>,
        "Thomas Zimmermann" <tzimmermann@...e.de>
Subject: Re: [PATCH v18 07/26] drm/shmem-helper: Use refcount_t for
 pages_use_count

On Mon, 30 Oct 2023 02:01:46 +0300, Dmitry Osipenko wrote:
> Use atomic refcount_t helper for pages_use_count to optimize pin/unpin
> functions by skipping reservation locking while GEM's pin refcount > 1.
> 
> Reviewed-by: Boris Brezillon <boris.brezillon@...labora.com>
> Suggested-by: Boris Brezillon <boris.brezillon@...labora.com>
> 
> [ ... ]

Acked-by: Maxime Ripard <mripard@...nel.org>

Thanks!
Maxime