Hello, I am trying to apply CMA feature for my platform. My kernel version, 3.10.x, is not allocating memory from CMA area so that I applied a Joonsoo Kim's patch (https://lkml.org/lkml/2014/5/28/64). Now my platform can use CMA area effectively. But I have many failures to allocate memory from CMA area. I found the same situation to Laura Abbott's patch descrbing, https://lkml.org/lkml/2012/8/31/313, that releases buffer-heads attached at CPU's LRU list. If Joonsoo's patch is applied and/or CMA feature is applied more and more, buffer-heads problem is going to be serious definitely. Please look into the Laura's patch again. I think it must be applied with Joonsoo's patch. -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>