linux-kernel - Re: [PATCH v2 2/3] drm/ttm: introduce dma cache sync helpers

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

Message-ID: <53A953E6.2030503@nvidia.com>
Date:	Tue, 24 Jun 2014 19:33:10 +0900
From:	Alexandre Courbot <acourbot@...dia.com>
To:	Russell King - ARM Linux <linux@....linux.org.uk>
CC:	David Airlie <airlied@...ux.ie>, Ben Skeggs <bskeggs@...hat.com>,
	Lucas Stach <dev@...xeye.de>,
	Thierry Reding <thierry.reding@...il.com>,
	"gnurou@...il.com" <gnurou@...il.com>,
	"nouveau@...ts.freedesktop.org" <nouveau@...ts.freedesktop.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"dri-devel@...ts.freedesktop.org" <dri-devel@...ts.freedesktop.org>,
	"linux-tegra@...r.kernel.org" <linux-tegra@...r.kernel.org>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH v2 2/3] drm/ttm: introduce dma cache sync helpers

On 06/24/2014 07:02 PM, Russell King - ARM Linux wrote:
> On Tue, Jun 24, 2014 at 06:54:26PM +0900, Alexandre Courbot wrote:
>> From: Lucas Stach <dev@...xeye.de>
>>
>> On architectures for which access to GPU memory is non-coherent,
>> caches need to be flushed and invalidated explicitly at the
>> appropriate places. Introduce two small helpers to make things
>> easy for TTM-based drivers.
>
> Have you run this with DMA API debugging enabled?  I suspect you haven't,
> and I recommend that you do.

# cat /sys/kernel/debug/dma-api/error_count
162621

(╯°□°）╯︵ ┻━┻)

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/