On Mon, Nov 14, 2016 at 11:02:47AM -0700, Jens Axboe wrote: > > We need it unless we want unbounded allocations for the biovec. With a > > 1GB I/O we're at a page size allocation, and with 64MB I/Os that aren't > > unheard of we'd be up to a 64 pages or an order 6 allocation which will > > take down the VM. We also need to pin down all the user memory while > > doing the I/O instead of having throttling on the bio mempool before > > doing the get_user_pages. > > Just add the iterator and loop for every X pages? We can even put a plug > around it, if we have to. That's pretty much what my patch does.. -- To unsubscribe from this list: send the line "unsubscribe linux-block" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
