[lkml]   [2013]   [Jan]   [6]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectRe: [PATCH v3 2/4] videobuf2-dma-streaming: new videobuf2 memory allocator
> The problem is that on the sta2x11 architecture only the first 
> 512MB are available through the PCI bus, but the allocator can allocate memory
> for DMA above this limit. By using GFP_DMA flags the allocation take place
> under the 16MB so it works.

Still, you are not running the upstream allocator. IIUC, you added a
"gfp_t" field in the platform data or somewhere, so the sta2x11 can
request GFP_DMA to be OR'd, while other users remain unaffected. Will
you please submit the patch to achieve that?

> I cannot do performance test at the moment because I don't have the time, so I
> cannot personally justify the presence of a new allocator.

I don't expect you'll see serious performance differences on the PC. I
think ARM users will have better benefits, due to the different cache
architecture. You told me Jon measured meaningful figures on a Marvel

> I will propose V4 patches soon.


 \ /
  Last update: 2013-01-07 01:01    [W:0.046 / U:0.600 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site