On Thu, 2014-01-30 at 12:58 -0800, David Rientjes wrote: > On Thu, 30 Jan 2014, Sasha Levin wrote: > > > VM_BUG_ON_PAGE is just a VM_BUG_ON that does dump_page before the BUG(). > > > > The only reason to use VM_BUG_ON instead of VM_BUG_ON_PAGE is if the page > > you're working > > with doesn't make sense/isn't useful as debug output. > > > > If doing a dump_page is causing issues somewhere then dump_pages should be > > fixed - instead > > of hiding the problem under the rug by not using it. > > > > It sounds like dump_page() isn't necessarily at fault itself but rather > that using it is opening a race even wider that causes this failure to > occur more often than it normally would.
It turns out this issue goes way back, you just have try hard enough to trigger it under very specific conditions. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
