linux-kernel - Re: [PATCH 0/7] dmaengine:omap-dma: Linked List transfer for slave

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]

Date:	Mon, 18 Jul 2016 11:31:37 +0100
From:	Russell King - ARM Linux <linux@...linux.org.uk>
To:	Peter Ujfalusi <peter.ujfalusi@...com>
Cc:	vinod.koul@...el.com, linux-kernel@...r.kernel.org,
	dmaengine@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	linux-omap@...r.kernel.org, tony@...mide.com
Subject: Re: [PATCH 0/7] dmaengine:omap-dma: Linked List transfer for slave_sg

On Thu, Jul 14, 2016 at 03:42:35PM +0300, Peter Ujfalusi wrote:
> Hi,
> 
> The following series with the final patch will add support for sDMA Linked List
> transfer support.
> Linked List is supported by sDMA in OMAP3630+ (OMAP4/5, dra7 family).
> If the descriptor load feature is present we can create the descriptors for each
> SG beforehand and let sDMA to walk them through.
> This way the number of sDMA interrupts the kernel need to handle will drop
> dramatically.

I suggested this a few years ago, and I was told by TI that there was
no interest to implement this feature as it had very little performance
effect.  Do I take it that TI have changed their position on this
feature?

-- 
RMK's Patch system: http://www.armlinux.org.uk/developer/patches/
FTTC broadband for 0.8mile line: currently at 9.6Mbps down 400kbps up
according to speedtest.net.