On 07/26/2012 11:25 AM, Peng Tao wrote: > For these two sectors, I need to allocate two pages... Just look at > struct bio_vec. > NO! I know all about bio_vecs You need 1024 bytes, and 2 x one entry BIOs which is a few bytes, where did you get the "two pages" from? -- To unsubscribe from this list: send the line "unsubscribe linux-nfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html