On Thu, Aug 19, 2010 at 07:51:06PM +0800, Johannes Weiner wrote: > I am currently trying to get rid of all the congestion_wait() in the VM. > They are used for different purposes, so they need different replacement > mechanisms. > > I saw Shaohua's patch to make congestion_wait() cleverer. But I really > think that congestion is not a good predicate in the first place. Why > would the VM care about IO _congestion_? It needs a bunch of pages to > complete IO, whether the writing device is congested is not really > useful information at this point, I think. I have the same feeling that the congestion_wait() calls are not pertinent ones. I'm glad to see people working on that exploring all possible replacement schemes. Thanks, Fengguang -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxxx For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>