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c6ba06d86c
Make the nfsclient always call vnode_pager_setsize() with the vnode exclusively locked. This ensures that page fault always can find the backing page if the object size check succeeded. Set VV_VMSIZEVNLOCK flag on NFS nodes. The main offender breaking the interface in nfsclient is nfs_loadattrcache(), which is used whenever server responded with updated attributes, which can happen on non-changing operations as well. Also, iod threads only have buffers locked (and even that is LK_KERNPROC), but they still may call nfs_loadattrcache() on RPC response. Instead of immediately calling vnode_pager_setsize() if server response indicated changed file size, but the vnode is not exclusively locked, set a new node flag NVNSETSZSKIP. When the vnode exclusively locked, or when we can temporary upgrade the lock to exclusive, call vnode_pager_setsize(), by providing the nfsclient VOP_LOCK() implementation. Tested by: pho Discussed with: rmacklem Sponsored by: The FreeBSD Foundation MFC after: 2 weeks Differential revision: https://reviews.freebsd.org/D21883 |
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| .. | ||
| nfs.h | ||
| nfs_commonacl.c | ||
| nfs_commonkrpc.c | ||
| nfs_commonport.c | ||
| nfs_commonsubs.c | ||
| nfs_var.h | ||
| nfscl.h | ||
| nfsclstate.h | ||
| nfsdport.h | ||
| nfskpiport.h | ||
| nfsm_subs.h | ||
| nfsport.h | ||
| nfsproto.h | ||
| nfsrvcache.h | ||
| nfsrvstate.h | ||
| nfsv4_errstr.h | ||
| rpcv2.h | ||
| xdr_subs.h | ||