2006-09-01 04:18:26

by Grant Coady

Subject: Query: DMA Engine support in make oldconfig

Hi there,

make oldconfig from 2.6.17.11 to 2.6.18-rc5: This help text doesn't say
what the right choice should be? Unclear to me anyway, so I take the
default, is that bad for an x86 32-bit box?
"
* DMA Engine support
*
Support for DMA engines (DMA_ENGINE) [N/y/?] (NEW) ?

DMA engines offload copy operations from the CPU to dedicated
hardware, allowing the copies to happen asynchronously.
"
Thanks,
Grant.

2006-09-01 04:46:59

by Randy Dunlap

Subject: Re: Query: DMA Engine support in make oldconfig

On Fri, 01 Sep 2006 14:18:23 +1000 Grant Coady wrote:

> Hi there,
>
> make oldconfig from 2.6.17.11 to 2.6.18-rc5: This help text doesn't say
> what the right choice should be? Unclear to me anyway, so I take the
> default, is that bad for an x86 32-bit box?
> "
> * DMA Engine support
> *
> Support for DMA engines (DMA_ENGINE) [N/y/?] (NEW) ?
>
> DMA engines offload copy operations from the CPU to dedicated
> hardware, allowing the copies to happen asynchronously.
> "

I would guess that you don't have any hardware that is
supported, so enabling it will just use a little memory
(or at least that's all it should do -- not hurt anything
else).

---
~Randy