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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 /include/trace | |
| parent | NFS: remove duplicate headers (diff) | |
| download | wireguard-linux-53bc19f17f21738735706fabcae3070f16c833db.tar.xz wireguard-linux-53bc19f17f21738735706fabcae3070f16c833db.zip | |
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 'include/trace')
| -rw-r--r-- | include/trace/events/rpcgss.h | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/include/trace/events/rpcgss.h b/include/trace/events/rpcgss.h index 32d88c4fb063..421b14db87ae 100644 --- a/include/trace/events/rpcgss.h +++ b/include/trace/events/rpcgss.h @@ -291,6 +291,40 @@ TRACE_EVENT(rpcgss_need_reencode, __entry->ret ? "" : "un") ); +TRACE_EVENT(rpcgss_update_slack, + TP_PROTO( + const struct rpc_task *task, + const struct rpc_auth *auth + ), + + TP_ARGS(task, auth), + + TP_STRUCT__entry( + __field(unsigned int, task_id) + __field(unsigned int, client_id) + __field(u32, xid) + __field(const void *, auth) + __field(unsigned int, rslack) + __field(unsigned int, ralign) + __field(unsigned int, verfsize) + ), + + TP_fast_assign( + __entry->task_id = task->tk_pid; + __entry->client_id = task->tk_client->cl_clid; + __entry->xid = be32_to_cpu(task->tk_rqstp->rq_xid); + __entry->auth = auth; + __entry->rslack = auth->au_rslack; + __entry->ralign = auth->au_ralign; + __entry->verfsize = auth->au_verfsize; + ), + + TP_printk("task:%u@%u xid=0x%08x auth=%p rslack=%u ralign=%u verfsize=%u\n", + __entry->task_id, __entry->client_id, __entry->xid, + __entry->auth, __entry->rslack, __entry->ralign, + __entry->verfsize) +); + DECLARE_EVENT_CLASS(rpcgss_svc_seqno_class, TP_PROTO( __be32 xid, |