linux-kernel - Re: [PATCH v3 0/9] dma-fence: Deadline awareness

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 for Android: free password hash cracker in your pocket

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

Date:   Thu, 09 Sep 2021 16:42:07 +0000
From:   Simon Ser <contact@...rsion.fr>
To:     Rob Clark <robdclark@...il.com>
Cc:     dri-devel <dri-devel@...ts.freedesktop.org>,
        "moderated list:DMA BUFFER SHARING FRAMEWORK" 
        <linaro-mm-sig@...ts.linaro.org>, Daniel Vetter <daniel@...ll.ch>,
        Christian König <ckoenig.leichtzumerken@...il.com>,
        Michel Dänzer <michel@...nzer.net>,
        Pekka Paalanen <ppaalanen@...il.com>,
        Rob Clark <robdclark@...omium.org>,
        Alex Deucher <alexander.deucher@....com>,
        Andrey Grodzovsky <andrey.grodzovsky@....com>,
        Boris Brezillon <boris.brezillon@...labora.com>,
        Christian König <christian.koenig@....com>,
        Daniel Vetter <daniel.vetter@...ll.ch>,
        freedreno <freedreno@...ts.freedesktop.org>,
        Gustavo Padovan <gustavo@...ovan.org>,
        linux-arm-msm <linux-arm-msm@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        "open list:DMA BUFFER SHARING FRAMEWORK" 
        <linux-media@...r.kernel.org>, Luben Tuikov <luben.tuikov@....com>,
        Melissa Wen <mwen@...lia.com>,
        Steven Price <steven.price@....com>,
        Tian Tao <tiantao6@...ilicon.com>
Subject: Re: [PATCH v3 0/9] dma-fence: Deadline awareness

On Thursday, September 9th, 2021 at 18:31, Rob Clark <robdclark@...il.com> wrote:

> Yes, I think it would.. and "dma-buf/sync_file: Add SET_DEADLINE
> ioctl" adds such an ioctl.. just for the benefit of igt tests at this
> point, but the thought was it would be also used by compositors that
> are doing such frame scheduling. Ofc danvet is a bit grumpy that
> there isn't a more real (than igt) userspace for the ioctl yet ;-)

Ah, very nice, I somehow missed it.

I guess one issue is that explicit sync isn't quite plumbed through
compositors yet, so without Jason's DMA-BUF to sync_file IOCTL it'd be
a bit difficult to use.

Can anybody set the deadline? I wonder if clients should be allowed to.

What happens if the deadline is exceeded? I'd assume nothing in
particular, the deadline being just a hint?