Subject: Re: 3.14-mw regression: rtl8169 WARNING: DMA-API: exceeded 7 overlapping mappings of pfn 55ebe

From: Dave Jones <[email-masked]>
Date: Thu, 13 Feb 2014 15:16:28 -0500

On Tue, Feb 11, 2014 at 06:07:10PM -0800, Dan Williams wrote:

 > The overlap granularity is too large.  Multiple dma_map_single
 > mappings are allowed to a given page as long as they don't collide on
 > the same cache line.
 > 
 > 
 > Please try the attached patch to see if it fixes this issue.  Works ok for me.

FWIW, since applying this, I haven't seen the 8169 warnings.

thanks,

	Dave