15 Feb
2011
15 Feb
'11
3:46 p.m.
On Tue, Feb 15, 2011 at 04:11:09PM +0100, Per Forlin wrote:
True. In my case write back is disable but read back is enable, that's why I didn't consider it.
What do you mean "write back is disable" ? You can only prevent writebacks by using a write-through cache.
Any writeback cache, whether in read-allocate or read-write-allocate mode will have writebacks.
Do you think it is feasible to let dma-mapping detect the cache configurations in runtime in order to prevent "unnecessary" cache operations?
Let's first straighten out your cache understanding above, because I don't think you understand properly yet.