> > What shocked me actually is that VM_BUG_ON code is executed on > !CONFIG_DEBUG_VM builds and has been since 2.6.36 due to commit [4e60c86bd: > gcc-4.6: mm: fix unused but set warnings]. I thought the whole point of > VM_BUG_ON was to avoid expensive and usually unnecessary checks. Andi, > was this deliberate? The idea was that the compiler optimizes it away anyways. I'm not fully sure what putback_balloon_page does, but if it just tests a bit (without non variable test_bit) it should be ok. -Andi -- 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>