ION和DMA-Buffer Heaps都是基于DMA-BUF框架实现的一种内存分配器,可以理解成是对exporter的一种封装。 DMA-BUF Heaps和ION不同点: ION buffer的分配都使用的是同一个设备节点/dev/ion, 而每一个DMA-BUF heap都有一个对应的设备节点/dev/dma_heap/<heap_name> ION支持同一个heap中传入vendor私有的heap flags...
= NULL' failed 0:00:00.077851750 889 0xffff88000b70 WARN dmabufheapsmemory gstdmabufheaps.c:119:gst_dmabufheaps_allocator_obtain: No allocator named dmabufheapsmem found (gst-launch-1.0:889): GStreamer-CRITICAL **: 06:27:14.684: gst_buffer_pool_config_set_allocator: assertion 'allocator !
* dma_heap_add - adds a heap to dmabuf heaps * @exp_info: information needed to register this heap */ struct dma_heap *dma_heap_add(const struct dma_heap_export_info *exp_info) { struct dma_heap *heap, *h, *err_ret; 21 changes: 1 addition & 20 deletions 21 include/linux/dma...
This patch adds a simple shrinker controlled page pool to the dmabuf heaps subsystem. This replaces the use of the networking page_pool, over concerns that the lack of a shrinker for that implementation may cause additional low-memory kills TODO: Take another pass at trying to unify this w...
DMA-BUF Heaps Linux user-space device buffer allocation and its uses ion : Generic buffer sharing for multiple device pipelines Trying to replace per SoC/GPU custom buffer sharing implementations...
[PATCH 1/5] kselftests: dmabuf-heaps: Fix Makefile's inclusion... John Stultz [PATCH 2/5] kselftests: dmabuf-heaps: Add clearer checks ... John Stultz [PATCH 3/5] kselftests: dmabuf-heaps: Softly fail if don'... John Stultz [PATCH 4/5] kselftests: dmabuf-heaps: Cleanup ...
drivers/dma-buf/dma-heap.c# 实现dma-heap的框架drivers/dma-buf/heaps/cma_heap.c# 管理从cma申请的内存drivers/dma-buf/heaps/system_heap.c# 管理从system申请的内存 dam-heap.c是一个抽象的接口层,为具体的heap(cma/system)提供注册机制,创建字符设备节点 ...
dma-buf的底层机制,安卓的ION也是基于此搭建出来的。但是ION在staging过程中受阻 ,最终upstream放弃了合入ION,而由John Stultz主领,在同样的dma-buf机制上,做了一个叫DMA-BUF Heaps的东西来替代ION。安卓社区也列了相应计划从ION迁移到DMA-BUF Heaps:LVC21-120 Moving to DMA BUF Heaps Now is the time!,从...
《[$] DMA-BUF cache handling: Off the DMA API map (part 1)》Recently, the DMA-BUF heaps interface was added to the 5.6 kernel. This interface is similar to ION, which has been used for years by Android ... O网页链接 文章来源:『 LWN.net | 关注Linux与开源社区 』 ...
ION provides debug visibility throughdebugfs. It organizes debug information under/sys/kernel/debug/ion, with bookkeeping information in stored files associated with heaps and clients identified by symbolic names or PIDs. Comparing ION and DMABUF ...