On 07/20, Benjamin LaHaise wrote: > > On Mon, Jul 20, 2015 at 09:24:40PM +0200, Oleg Nesterov wrote: > > On 07/20, Oleg Nesterov wrote: > > > > > > But again, again, please ignore. This all is off-topic and my > > > understanding > > > is very limited. > > > > Yes, yes, but sorry for noise and let me repeat... > > > > This memory lives in page-cache/lru, it is visible for shrinker which > > will unmap these pages for no reason on memory shortage. IOW, aio fools > > the kernel, this memory looks reclaimable but it is not. And we only do > > this for migration. > > And we have the same problem with O_DIRECT.
I don't this so, or I misunderstood. Sure, dio_get_page() will pin the page. But not forever and this is unavoidable. This is not the same. OK, nevermind, lets forget this. > > And I should have changes the subject a long ago... So what do you think > > we should do with the build failure? > > I honestly don't care what of the options you do -- please just don't go > about adding BUG()s. OK, thanks. Then I'll send v2 which adds ifdef(MMU) into aio_ring_vm_ops tomorrow. Oleg. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
