[openib-general] basic IB doubt

[Talpey, Thomas]

At 03:23 PM 8/25/2006, Greg Lindahl wrote:
>On Fri, Aug 25, 2006 at 03:21:20PM -0400, mlakshmanan at silverstorm.com wrote:
>
>> I presume you meant invalidate the cache, not flush it, before 
>accessing DMA'ed 
>> data. 
>
>Yes, this is what I meant. Sorry!

Flush (sync for_device) before posting.
Invalidate (sync for_cpu) before processing.

On some architectures, these operations flush and/or invalidate
i/o pipeline caches as well. As they should.

Tom.