diff options
| author |   Steve French <stfrench@microsoft.com> | 2019-03-09 20:29:55 -0600 |
|---|---|---|
| committer | Steve French <stfrench@microsoft.com> | 2019-03-14 19:32:35 -0500 |
| commit | 7937ca961c847bda8a75da5d9c34efee9602f6b5 (patch) | |
| tree | 62979d8e679d6800dc3f71c8352ef175733732bf /fs | |
| parent | smb3: display security information in /proc/fs/cifs/DebugData more accurately (diff) | |
| download | linux-dev-7937ca961c847bda8a75da5d9c34efee9602f6b5.tar.xz linux-dev-7937ca961c847bda8a75da5d9c34efee9602f6b5.zip | |
smb3: add dynamic tracepoint for timeout waiting for credits
To help debug credit starvation problems where we timeout
waiting for server to grant the client credits.
Signed-off-by: Steve French <stfrench@microsoft.com>
Reviewed-by: Ronnie Sahlberg <lsahlber@redhat.com>
Reviewed-by: Pavel Shilovsky <pshilov@microsoft.com>
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/cifs/trace.h | 1 | ||||
| -rw-r--r-- | fs/cifs/transport.c | 5 |
2 files changed, 6 insertions, 0 deletions
diff --git a/fs/cifs/trace.h b/fs/cifs/trace.h index d8b049afa606..c78e96c4cc53 100644 --- a/fs/cifs/trace.h +++ b/fs/cifs/trace.h @@ -713,6 +713,7 @@ DEFINE_EVENT(smb3_credit_class, smb3_##name, \ TP_ARGS(currmid, hostname, credits)) DEFINE_SMB3_CREDIT_EVENT(reconnect_with_invalid_credits); +DEFINE_SMB3_CREDIT_EVENT(credit_timeout); #endif /* _CIFS_TRACE_H */ diff --git a/fs/cifs/transport.c b/fs/cifs/transport.c index b3d04018195c..8731cfa66026 100644 --- a/fs/cifs/transport.c +++ b/fs/cifs/transport.c @@ -527,6 +527,8 @@ wait_for_free_credits(struct TCP_Server_Info *server, const int num_credits, has_credits(server, credits, num_credits), t); cifs_num_waiters_dec(server); if (!rc) { + trace_smb3_credit_timeout(server->CurrentMid, + server->hostname, num_credits); cifs_dbg(VFS, "wait timed out after %d ms\n", timeout); return -ENOTSUPP; @@ -565,6 +567,9 @@ wait_for_free_credits(struct TCP_Server_Info *server, const int num_credits, t); cifs_num_waiters_dec(server); if (!rc) { + trace_smb3_credit_timeout( + server->CurrentMid, + server->hostname, num_credits); cifs_dbg(VFS, "wait timed out after %d ms\n", timeout); return -ENOTSUPP; |