diff options
| author | Steve French <stfrench@microsoft.com> | 2019-09-10 06:57:11 +0300 |
|---|---|---|
| committer | Steve French <stfrench@microsoft.com> | 2019-09-16 19:43:38 +0300 |
| commit | 1b63f1840e787516bf2d3e5c27c2d22fe23cfb37 (patch) | |
| tree | 7e3413e58f1cf0a5bd3b577dfbee90b365a7b9cf /fs/cifs/transport.c | |
| parent | 10328c44cc1506dd82fd835efcaafd519866c464 (diff) | |
| download | linux-1b63f1840e787516bf2d3e5c27c2d22fe23cfb37.tar.xz | |
smb3: display max smb3 requests in flight at any one time
Displayed in /proc/fs/cifs/Stats once for each
socket we are connected to.
This allows us to find out what the maximum number of
requests that had been in flight (at any one time). Note that
/proc/fs/cifs/Stats can be reset if you want to look for
maximum over a small period of time.
Sample output (immediately after mount):
Resources in use
CIFS Session: 1
Share (unique mount targets): 2
SMB Request/Response Buffer: 1 Pool size: 5
SMB Small Req/Resp Buffer: 1 Pool size: 30
Operations (MIDs): 0
0 session 0 share reconnects
Total vfs operations: 5 maximum at one time: 2
Max requests in flight: 2
1) \\localhost\scratch
SMBs: 18
Bytes read: 0 Bytes written: 0
...
Signed-off-by: Steve French <stfrench@microsoft.com>
Reviewed-by: Pavel Shilovsky <pshilov@microsoft.com>
Diffstat (limited to 'fs/cifs/transport.c')
| -rw-r--r-- | fs/cifs/transport.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/fs/cifs/transport.c b/fs/cifs/transport.c index 4fccb90492e9..308ad0f495e1 100644 --- a/fs/cifs/transport.c +++ b/fs/cifs/transport.c @@ -532,6 +532,8 @@ wait_for_free_credits(struct TCP_Server_Info *server, const int num_credits, if ((flags & CIFS_TIMEOUT_MASK) == CIFS_NON_BLOCKING) { /* oplock breaks must not be held up */ server->in_flight++; + if (server->in_flight > server->max_in_flight) + server->max_in_flight = server->in_flight; *credits -= 1; *instance = server->reconnect_instance; spin_unlock(&server->req_lock); @@ -608,6 +610,8 @@ wait_for_free_credits(struct TCP_Server_Info *server, const int num_credits, if ((flags & CIFS_TIMEOUT_MASK) != CIFS_BLOCKING_OP) { *credits -= num_credits; server->in_flight += num_credits; + if (server->in_flight > server->max_in_flight) + server->max_in_flight = server->in_flight; *instance = server->reconnect_instance; } spin_unlock(&server->req_lock); |