Hello, On Thu, Feb 12, 2015 at 02:15:29AM +0400, Konstantin Khlebnikov wrote: > Well, ok. Even if shared writes are rare whey should be handled somehow > without relying on kupdate-like writeback. If memcg has a lot of dirty pages This only works iff we consider those cases to be marginal enough to be handle them in a pretty ghetto way. > but their inodes are accidentially belong to wrong wb queues when tasks in > that memcg shouldn't stuck in balance-dirty-pages until somebody outside > acidentially writes this data. That's all what I wanted to say. But, right, yeah, corner cases around this could be nasty if writeout interval is set really high. I don't think it matters for the default 5s interval at all. Maybe what we need is queueing a delayed per-wb work w/ the default writeout interval when dirtying a foreign inode. I'll think more about it. Thanks. -- tejun -- 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>