linux-kernel - RE: [RFC][PATCH 00/12] md raid acceleration and performance analysis

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

Date:	Tue, 6 Feb 2007 15:49:03 -0800
From:	"Leech, Christopher" <christopher.leech@...el.com>
To:	"Williams, Dan J" <dan.j.williams@...el.com>,
	"NeilBrown" <neilb@...e.de>, <linux-raid@...r.kernel.org>
Cc:	"Evgeniy Polyakov" <johnpol@....mipt.ru>,
	"Arjan van de Ven" <arjan@...radead.org>,
	<linux-kernel@...r.kernel.org>
Subject: RE: [RFC][PATCH 00/12] md raid acceleration and performance analysis

Hi Dan,

I've been looking over how your patches change the ioatdma driver.  I
like the idea of removing the multiple entry points for virtual address
vs. page struct arguments, and just using dma_addr_t for the driver
interfaces.

But, I don't think having both ioatdma and iop-adma implement map_page,
map_single, unmap_page, and unmap_single entry points is much better.
Do you see a reason why it wouldn't work to expose the generic device
for a DMA channel, and replace instances of

	dma_device->map_single(dma_chan, src, len, DMA_TO_DEVICE)

with

	dma_map_single(dma_device->dev, src, len, DMA_TO_DEVICE)

I am a little concerned about having the DMA mapping happen outside of
the driver, but the unmapping is still in the driver cleanup routine.
I'm not sure if it's really a problem, or how I'd change it though.

- Chris
-
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/