On Wed, 29 May 2013 15:42:36 -0500 Seth Jennings <sjenning@xxxxxxxxxxxxxxxxxx> wrote: > > > > I worry about any code which independently looks at the pageframe > > > > tables and expects to find page struts there. One example is probably > > > > memory_failure() but there are probably others. > > > > ^^ this, please. It could be kinda fatal. > > I'll look into this. > > The expected behavior is that memory_failure() should handle zbud pages in the > same way that it handles in-use slub/slab/slob pages and return -EBUSY. memory_failure() is merely an example of a general problem: code which reads from the memmap[] array and expects its elements to be of type `struct page'. Other examples might be memory hotplugging, memory leak checkers etc. I have vague memories of out-of-tree patches (bigphysarea?) doing this as well. It's a general problem to which we need a general solution. -- 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>