On Tue, Oct 25, 2016 at 03:13:17AM +0300, Kirill A. Shutemov wrote: > We are going to do IO a huge page a time. So we need BIO_MAX_PAGES to be > at least HPAGE_PMD_NR. For x86-64, it's 512 pages.
NAK. The maximum bio size should not depend on an obscure vm config, please send a standalone patch increasing the size to the block list, with a much long explanation. Also you can't simply increase the size of the largers pool, we'll probably need more pools instead, or maybe even implement a similar chaining scheme as we do for struct scatterlist.
