On Aug 7, 2013, at 7:41 PM, Ed Cashin wrote: > It sounds like it's wrong to give block pages with a zero count, so why not just have aoe BUG_ON(compound_trans_head(bv->page->_count) == 0) until we're sure nobody does that anymore? Ugh. I goofed the parens and such. I meant, BUG_ON(compound_trans_head(bv->bv_page)->_count == 0) ... will catch the cases we think should not be occurring. > If that idea makes sense to you, I will submit a new patch to follow the one under discussion. -- Ed Cashin ecashin@xxxxxxxxxx -- 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