Hi Joerg,
On Thu, 2012-09-27 at 12:20 +0200, Joerg Roedel wrote:
> Hi Shuah,
>
> the patch looks better then the older versions. It comes closer to a
> merge, but I see one issue here:
>
> On Tue, Sep 25, 2012 at 07:05:17PM -0600, Shuah Khan wrote:
> > debug_dma_mapping_error(struct device *dev,
Hi Shuah,
the patch looks better then the older versions. It comes closer to a
merge, but I see one issue here:
On Tue, Sep 25, 2012 at 07:05:17PM -0600, Shuah Khan wrote:
> debug_dma_mapping_error(struct device *dev, dma_addr_t dma_addr):
> Sets dma map error checked status for the dma map
On Wed, 2012-09-26 at 09:12 -0400, Konrad Rzeszutek Wilk wrote:
> >
>
> Thanks for improving this patch. It is looking more and more ready for
> the kernel. With that in mind, I've some comments below.
Good. Thanks for the comments and good suggestions. Will work on v3.
>
> >
> >
> > --- a/lib
> Enhancements to dma-debug API are made to add new debugfs interfaces to
> report total dma errors, dma errors that are not checked, and unmap errors
> for the entire system. Please note that these are system wide counters for
> all devices in the system.
>
> The following new dma-debug interface
A recent dma mapping error analysis effort showed that a large percentage
of dma_map_single() and dma_map_page() returns are not checked for mapping
errors.
Reference:
http://linuxdriverproject.org/mediawiki/index.php/DMA_Mapping_Error_Analysis
Adding support for tracking dma mapping and unmappin
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