git: network - Tokenize NFS, fix MP races
commit c6b43e93a6cf0a70bde32cd141057a0df9860e13
Author: Matthew Dillon <dillon@apollo.backplane.com>
Date: Fri Sep 10 12:09:34 2010 -0700
network - Tokenize NFS, fix MP races
* Now that the rest of the network stack is running MPSAFE, poor NFS is
hitting races and other issues because it was depending on the MP lock.
* Recombobulate NFS with tokens, protecting all border crossings:
A global nfs_token is used for the nfs mount list, nfsd list, and
server socket list.
A per-socket token (nfssvc_sock->ns_token) governs each served mount.
A per-mount token (nfsmount->nm_token) governs each client mount.
* Callouts and TCP upcalls are protected. The per-socket TCP upcall
is protected by the nfssvc_sock token.
* The NFS iod thread pairs and nfsd threads now run MPSAFE.
* NFSv3 is now holy-shit fast and can trivially max-out a GigE link
without TSO when the server is not otherwise limited by server-side
disks.
Summary of changes:
sys/vfs/nfs/nfs.h | 7 ++-
sys/vfs/nfs/nfs_bio.c | 14 ++--
sys/vfs/nfs/nfs_iod.c | 19 +----
sys/vfs/nfs/nfs_node.c | 11 +++-
sys/vfs/nfs/nfs_socket.c | 32 +++++++-
sys/vfs/nfs/nfs_subs.c | 8 ++-
sys/vfs/nfs/nfs_syscalls.c | 91 ++++++++++++++++++-----
sys/vfs/nfs/nfs_vfsops.c | 41 +++++++++-
sys/vfs/nfs/nfs_vnops.c | 174 ++++++++++++++++++++++++++++++++++++++-----
sys/vfs/nfs/nfsmount.h | 2 +
10 files changed, 324 insertions(+), 75 deletions(-)
http://gitweb.dragonflybsd.org/dragonfly.git/commitdiff/c6b43e93a6cf0a70bde32cd141057a0df9860e13
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