[PATCH v2 30/31] afs: Add a tracepoint for afs_read_receive()
From: David Howells <dhowells@redhat.com>
Date: 2024-10-25 20:43:42
Also in:
ceph-devel, linux-cifs, linux-fsdevel, linux-mm, linux-nfs, lkml, netfs, v9fs
Subsystem:
afs filesystem, filesystems (vfs and infrastructure), the rest, tracing · Maintainers:
David Howells, Marc Dionne, Alexander Viro, Christian Brauner, Linus Torvalds, Steven Rostedt, Masami Hiramatsu
Add a tracepoint for afs_read_receive() to allow potential missed wakeups to be debugged. Signed-off-by: David Howells <dhowells@redhat.com> cc: Marc Dionne <marc.dionne@auristor.com> cc: linux-afs@lists.infradead.org --- fs/afs/file.c | 1 + include/trace/events/afs.h | 30 ++++++++++++++++++++++++++++++ 2 files changed, 31 insertions(+)
diff --git a/fs/afs/file.c b/fs/afs/file.c
index e89a98735317..dbc108c6cae5 100644
--- a/fs/afs/file.c
+++ b/fs/afs/file.c@@ -270,6 +270,7 @@ static void afs_read_receive(struct afs_call *call) enum afs_call_state state; _enter(""); + trace_afs_read_recv(op, call); state = READ_ONCE(call->state); if (state == AFS_CALL_COMPLETE)
diff --git a/include/trace/events/afs.h b/include/trace/events/afs.h
index 020ab7302a6b..8da64c9d25e6 100644
--- a/include/trace/events/afs.h
+++ b/include/trace/events/afs.h@@ -1773,6 +1773,36 @@ TRACE_EVENT(afs_make_call, __entry->fid.unique) ); +TRACE_EVENT(afs_read_recv, + TP_PROTO(const struct afs_operation *op, const struct afs_call *call), + + TP_ARGS(op, call), + + TP_STRUCT__entry( + __field(unsigned int, rreq) + __field(unsigned int, sreq) + __field(unsigned int, op) + __field(unsigned int, op_flags) + __field(unsigned int, call) + __field(enum afs_call_state, call_state) + ), + + TP_fast_assign( + __entry->op = op->debug_id; + __entry->sreq = op->fetch.subreq->debug_index; + __entry->rreq = op->fetch.subreq->rreq->debug_id; + __entry->op_flags = op->flags; + __entry->call = call->debug_id; + __entry->call_state = call->state; + ), + + TP_printk("R=%08x[%x] OP=%08x c=%08x cs=%x of=%x", + __entry->rreq, __entry->sreq, + __entry->op, + __entry->call, __entry->call_state, + __entry->op_flags) + ); + #endif /* _TRACE_AFS_H */ /* This part must be outside protection */