Re: [PATCH v7 3/8] media: vsp1: Provide a body pool

2018-04-30 Thread Kieran Bingham
Hi Laurent, On 06/04/18 23:33, Laurent Pinchart wrote: > Hi Kieran, > > Thank you for the patch. > > On Thursday, 8 March 2018 02:05:26 EEST Kieran Bingham wrote: >> Each display list allocates a body to store register values in a dma >> accessible buffer from a dma_alloc_wc() allocation. Each o

Re: [PATCH v7 3/8] media: vsp1: Provide a body pool

2018-04-06 Thread Laurent Pinchart
Hi Kieran, Thank you for the patch. On Thursday, 8 March 2018 02:05:26 EEST Kieran Bingham wrote: > Each display list allocates a body to store register values in a dma > accessible buffer from a dma_alloc_wc() allocation. Each of these > results in an entry in the TLB, and a large number of disp

[PATCH v7 3/8] media: vsp1: Provide a body pool

2018-03-07 Thread Kieran Bingham
Each display list allocates a body to store register values in a dma accessible buffer from a dma_alloc_wc() allocation. Each of these results in an entry in the TLB, and a large number of display list allocations adds pressure to this resource. Reduce TLB pressure on the IPMMUs by allocating mult