The server's splice read path is used by the majority of exported
filesystems. At last month's bake-a-thon, we tossed around some
ideas about how to improve benchmarking and test coverage of the NFS
server's vectored-read path, which is a fallback.
One way to do this would be to expose a switch that can be set by
test harnesses to disable splice reads.
As an initial step, hoist RQ_SPLICE_OK out of the RPC layer. Later,
I'll add a netlink command to as a switch between "use splice if
possible" and "always use vectored reads". (I don't want to collide
with the work Lorenzo is doing).
Changes since v1:
- Address "undefined reference to `svcauth_gss_flavor'"
---
Chuck Lever (4):
SUNRPC: Add a server-side API for retrieving an RPC's pseudoflavor
NFSD: Replace RQ_SPLICE_OK in nfsd_read()
NFSD: Modify NFSv4 to use nfsd_read_splice_ok()
SUNRPC: Remove RQ_SPLICE_OK
fs/nfsd/nfs4proc.c | 7 +++++--
fs/nfsd/nfs4xdr.c | 13 ++++++++-----
fs/nfsd/vfs.c | 26 +++++++++++++++++++++++++-
fs/nfsd/vfs.h | 1 +
fs/nfsd/xdr4.h | 1 +
include/linux/sunrpc/svc.h | 2 --
include/linux/sunrpc/svcauth.h | 7 ++++++-
include/trace/events/sunrpc.h | 1 -
net/sunrpc/auth_gss/svcauth_gss.c | 16 ++++++----------
net/sunrpc/svc.c | 2 --
net/sunrpc/svcauth.c | 16 ++++++++++++++++
11 files changed, 68 insertions(+), 24 deletions(-)
--
Chuck Lever
