On Mon, Jul 13, 2015 at 03:52:53PM +0900, Sergey Senozhatsky wrote: > Why? In some sense, shrinker callbacks are just a way to be nice. > No one writes a driver just to be able to handle shrinker calls. An > ability to react to those calls is just additional option; it does > not directly affect or limit driver's functionality (at least, it > really should not). No, they are not just nice. They are a fundamental part of memory management and required to reclaim (often large) amounts of memory. Nevermind that we don't ignore any other registration time error in the kernel. > > The right way forward is to handle register failure properly. > > In other words, to > (a) keep a flag to signify that register was not successful > or > (b) look at ->shrinker.list.next or ->nr_deferred > or > (c) treat register failures as critical errors. (I sort of > disagree with you here). The only important part is here is (c). -- 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>