From: Tomi Valkeinen <tomi.valkeinen@ti.com>
To: Daniel Vetter <daniel.vetter@ffwll.ch>,
DRI Development <dri-devel@lists.freedesktop.org>
Cc: Daniel Vetter <daniel.vetter@intel.com>,
Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Subject: Re: [PATCH 4/5] drm/omapdrm: Fix mm_list locking
Date: Thu, 29 Mar 2018 12:40:23 +0300 [thread overview]
Message-ID: <bcf4efa7-b970-776e-4196-15698ce1ac15@ti.com> (raw)
In-Reply-To: <20180327082356.24516-4-daniel.vetter@ffwll.ch>
On 27/03/18 11:23, Daniel Vetter wrote:
> - None of the list walkings where protected.
>
> - Switch to a mutex since the list walking could potentially take a
> very long time.
>
> Only thing we need to be careful with here is that while we walk the
> list we cant unreference any gem objects, since the final unref would
> result in a recursive deadlock. But the only functions that walk the
> list is the device resume and debugfs dumping, so all safe.
>
> Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
> Cc: Tomi Valkeinen <tomi.valkeinen@ti.com>
> ---
> drivers/gpu/drm/omapdrm/omap_debugfs.c | 2 ++
> drivers/gpu/drm/omapdrm/omap_drv.c | 2 +-
> drivers/gpu/drm/omapdrm/omap_drv.h | 2 +-
> drivers/gpu/drm/omapdrm/omap_gem.c | 11 +++++++----
> 4 files changed, 11 insertions(+), 6 deletions(-)
Thanks, I'll pick this to omapdrm branch.
Tomi
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next prev parent reply other threads:[~2018-03-29 9:53 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-03-27 8:23 [PATCH 1/5] staging/vboxvideo: Use gem_free_object_unlocked Daniel Vetter
2018-03-27 8:23 ` [PATCH 2/5] drm/rockchip: fixup comment for gem_free_object_unlocked Daniel Vetter
2018-03-28 14:02 ` Sean Paul
2018-03-27 8:23 ` [PATCH 3/5] drm/udl: Get rid of dev->struct_mutex usage Daniel Vetter
2018-03-27 16:35 ` Sean Paul
2018-03-27 8:23 ` [PATCH 4/5] drm/omapdrm: Fix mm_list locking Daniel Vetter
2018-03-29 9:40 ` Tomi Valkeinen [this message]
2018-03-27 8:23 ` [PATCH 5/5] drm/omapdrm: Switch to gem_free_object_unlocked Daniel Vetter
2018-03-28 9:52 ` Tomi Valkeinen
2018-03-28 10:12 ` Daniel Vetter
2018-03-28 11:13 ` Tomi Valkeinen
2018-03-28 11:41 ` [PATCH] " Daniel Vetter
2018-03-29 9:41 ` Tomi Valkeinen
2018-04-02 15:05 ` Laurent Pinchart
2018-04-03 9:07 ` Daniel Vetter
2018-04-03 11:23 ` Laurent Pinchart
2018-03-27 8:34 ` [PATCH 1/5] staging/vboxvideo: Use gem_free_object_unlocked Greg Kroah-Hartman
2018-03-27 9:18 ` Daniel Vetter
2018-03-27 15:25 ` Greg Kroah-Hartman
2018-03-28 15:07 ` Daniel Vetter
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