Messages in this thread | | | Date | Mon, 29 Jul 2013 10:59:30 +0530 | From | Vinod Koul <> | Subject | Re: [PATCH v2] dma: mmp_pdma: fix a memory alloc error |
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On Thu, Jul 25, 2013 at 10:22:50AM +0800, Xiang Wang wrote:
Btw its generally a good idea to remove the parts not required for further discussion
> Would you please explain a little more about why we should use > GFP_NOWAIT here? This memory is not dedicated for DMA controller. Do > we have special reasons to use GFP_NOWAIT? Thanks! There are few reasons - the dma requests can be triggered from atomic context - so for above you can argue to use the GFP_ATOMIC and the guideline for dma drivers [1] was discussed briefly
~Vinod [1]: http://lkml.indiana.edu/hypermail/linux/kernel/0911.1/02316.html
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