Re: [RFC v2] dma-coherent: introduce no-align to avoid allocation failure and save memory

Hello 2017-11-24 19:35 GMT+09:00 David Laight : > From: Jaewon Kim >> Sent: 24 November 2017 05:59 >> >> dma-coherent uses bitmap APIs which internally consider align based on the >> requested size. If most of allocations are small size like KBs, using >> alignment scheme seems to be good for anti

RE: [RFC v2] dma-coherent: introduce no-align to avoid allocation failure and save memory

From: Jaewon Kim > Sent: 24 November 2017 05:59 > > dma-coherent uses bitmap APIs which internally consider align based on the > requested size. If most of allocations are small size like KBs, using > alignment scheme seems to be good for anti-fragmentation. But if large > allocation are commonly

[RFC v2] dma-coherent: introduce no-align to avoid allocation failure and save memory

dma-coherent uses bitmap APIs which internally consider align based on the requested size. If most of allocations are small size like KBs, using alignment scheme seems to be good for anti-fragmentation. But if large allocation are commonly used, then an allocation could be failed because of the ali