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| author | Chuck Lever <chuck.lever@oracle.com> | 2020-05-12 17:13:01 -0400 |
|---|---|---|
| committer | Anna Schumaker <Anna.Schumaker@Netapp.com> | 2020-06-11 13:33:47 -0400 |
| commit | 53bc19f17f21738735706fabcae3070f16c833db (patch) | |
| tree | 6c41ff5ea252d629a3293b09822c7d19c3cd730b /net/sunrpc/xprtrdma/rpc_rdma.c | |
| parent | ef31d878b2e7856cb5d2f76f14b37f4b834eb0f3 (diff) | |
| download | linux-53bc19f17f21738735706fabcae3070f16c833db.tar.bz2 | |
SUNRPC: receive buffer size estimation values almost never change
Avoid unnecessary cache sloshing by placing the buffer size
estimation update logic behind an atomic bit flag.
The size of GSS information included in each wrapped Reply does
not change during the lifetime of a GSS context. Therefore, the
au_rslack and au_ralign fields need to be updated only once after
establishing a fresh GSS credential.
Thus a slack size update must occur after a cred is created,
duplicated, renewed, or expires. I'm not sure I have this exactly
right. A trace point is introduced to track updates to these
variables to enable troubleshooting the problem if I missed a spot.
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
Diffstat (limited to 'net/sunrpc/xprtrdma/rpc_rdma.c')
| -rw-r--r-- | net/sunrpc/xprtrdma/rpc_rdma.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/net/sunrpc/xprtrdma/rpc_rdma.c b/net/sunrpc/xprtrdma/rpc_rdma.c index 3c627dc685cc..2081c8fbfa48 100644 --- a/net/sunrpc/xprtrdma/rpc_rdma.c +++ b/net/sunrpc/xprtrdma/rpc_rdma.c @@ -892,8 +892,8 @@ rpcrdma_marshal_req(struct rpcrdma_xprt *r_xprt, struct rpc_rqst *rqst) * or privacy, direct data placement of individual data items * is not allowed. */ - ddp_allowed = !(rqst->rq_cred->cr_auth->au_flags & - RPCAUTH_AUTH_DATATOUCH); + ddp_allowed = !test_bit(RPCAUTH_AUTH_DATATOUCH, + &rqst->rq_cred->cr_auth->au_flags); /* * Chunks needed for results? |