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. _______________________________________________ linaro-dev mailing list linaro-dev@lists.linaro.org http://lists.linaro.org/mailman/listinfo/linaro-dev
