1$FreeBSD$ 2These tests are intended to make sure that NFS's use of the 3b_{valid,dirty}{off,end} fields of struct buf is consistent with the 4VM system's use of the underlying VM pages. 5 6Test1: 7 Open the file and write into the file, creating a buf 8 with a valid range and a dirty range 9 10 Fsync, flushing the dirty range 11 12 Mmap and read the whole page. Since only part of the page is 13 valid, the VM system must re-read the invalid parts of the 14 page. 15 16Test2: 17 This is the same as test1 without the fsync. The VM system 18 should first write out the dirty range and then read the rest 19 of the page. This is currently broken since the vnode_pager 20 doesn't use the original buf for its i/o and therefore the 21 information in b_dirtyoff, b_dirtyend is not available. 22