经过阅读(dú )源码,其实不(bú )少思路和(hé )Android的(de )匿(nì )名内存(cún )有(yǒu )点相(xiàng )似(sì )阅读本文(wén )之前就算不知(zhī )道dma_buf的设(shè )计(jì )思想也(yě )没关系,我(wǒ )不会(huì )仔细(xì )到(dào )每一(yī )行,我会(huì )注重其在gralloc服务中的申(shēn )请流程(chéng ),看看ion是如(rú )何管理共享内(nèi )存,为什么要(yào )抛(pāo )弃ashmem我们
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