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经过阅读(dú )源码,其实(shí )不少思路(lù )和(hé )Android的(de )匿名内存(cún )有(yǒu )点相似阅(yuè )读本文之前就算(suàn )不知(zhī )道(dào )dma_buf的设(shè )计(jì )思想也没关系,我不(bú )会仔细(xì )到每(měi )一行(háng ),我(wǒ )会(huì )注重其在gralloc服务中(zhōng )的申请流(liú )程,看(kàn )看(kàn )ion是(shì )如何管(guǎn )理共享内存,为(wéi )什(shí )么要抛弃ashmem我们(men )

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