linux-kernel - Re: [PATCH 1/2] drm: introduce page_flip

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Message-ID: <CADnq5_NXd7HYipJTW_riwQDjrZ7S-PW7oFJ=C94_FGAAesV3kA@mail.gmail.com>
Date: Tue, 27 Jan 2026 17:57:35 -0500
From: Alex Deucher <alexdeucher@...il.com>
To: Hamza Mahfooz <someguy@...ective-light.com>
Cc: Mario Limonciello <mario.limonciello@....com>, Timur Kristóf <timur.kristof@...il.com>, 
	dri-devel@...ts.freedesktop.org, 
	Christian König <christian.koenig@....com>, 
	Alex Deucher <alexander.deucher@....com>, David Airlie <airlied@...il.com>, 
	Simona Vetter <simona@...ll.ch>, Harry Wentland <harry.wentland@....com>, Leo Li <sunpeng.li@....com>, 
	Rodrigo Siqueira <siqueira@...lia.com>, Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>, 
	Maxime Ripard <mripard@...nel.org>, Thomas Zimmermann <tzimmermann@...e.de>, 
	Sunil Khatri <sunil.khatri@....com>, Ce Sun <cesun102@....com>, Lijo Lazar <lijo.lazar@....com>, 
	Kenneth Feng <kenneth.feng@....com>, Ivan Lipski <ivan.lipski@....com>, 
	Alex Hung <alex.hung@....com>, Tom Chung <chiahsuan.chung@....com>, 
	Melissa Wen <mwen@...lia.com>, Michel Dänzer <mdaenzer@...hat.com>, 
	Fangzhi Zuo <Jerry.Zuo@....com>, amd-gfx@...ts.freedesktop.org, 
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/2] drm: introduce page_flip_timeout()

On Tue, Jan 27, 2026 at 5:53 PM Hamza Mahfooz
<someguy@...ective-light.com> wrote:
>
> On Mon, Jan 26, 2026 at 09:20:55AM -0500, Alex Deucher wrote:
> > I suspect just calling drm_crtc_send_vblank_event() here on the
> > relevant crtcs would be enough.
> >
>
> Seems like an interesting idea, though I would imagine we would still
> want to attempt a reset (of some kind) assuming that the subsequent page
> flip also experiences a timeout.

Is it actually a timeout or just missed interrupts?  I'm wondering if
some power feature races with the modeset and causes the interrupt to
get missed from time to time.

Alex