linux-kernel - [PATCH v2 01/12] nfsd: add commit start/done tracepoints around nfsd

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Message-Id: <20250409-nfsd-tracepoints-v2-1-cf4e084fdd9c@kernel.org>
Date: Wed, 09 Apr 2025 10:32:23 -0400
From: Jeff Layton <jlayton@...nel.org>
To: Chuck Lever <chuck.lever@...cle.com>, Neil Brown <neilb@...e.de>, 
 Olga Kornievskaia <okorniev@...hat.com>, Dai Ngo <Dai.Ngo@...cle.com>, 
 Tom Talpey <tom@...pey.com>, Trond Myklebust <trondmy@...nel.org>, 
 Anna Schumaker <anna@...nel.org>
Cc: Sargun Dillon <sargun@...gun.me>, linux-nfs@...r.kernel.org, 
 linux-kernel@...r.kernel.org, Jeff Layton <jlayton@...nel.org>
Subject: [PATCH v2 01/12] nfsd: add commit start/done tracepoints around
 nfsd_commit()

Very useful for gauging how long the vfs_fsync_range() takes.

Signed-off-by: Jeff Layton <jlayton@...nel.org>
---
 fs/nfsd/trace.h | 2 ++
 fs/nfsd/vfs.c   | 3 +++
 2 files changed, 5 insertions(+)

diff --git a/fs/nfsd/trace.h b/fs/nfsd/trace.h
index a7630e9f657776a9335ba68ad223641e3ed9121a..0d49fc064f7273f32c93732a993fd77bc0783f5d 100644
--- a/fs/nfsd/trace.h
+++ b/fs/nfsd/trace.h
@@ -451,6 +451,8 @@ DEFINE_NFSD_IO_EVENT(write_start);
 DEFINE_NFSD_IO_EVENT(write_opened);
 DEFINE_NFSD_IO_EVENT(write_io_done);
 DEFINE_NFSD_IO_EVENT(write_done);
+DEFINE_NFSD_IO_EVENT(commit_start);
+DEFINE_NFSD_IO_EVENT(commit_done);
 
 DECLARE_EVENT_CLASS(nfsd_err_class,
 	TP_PROTO(struct svc_rqst *rqstp,
diff --git a/fs/nfsd/vfs.c b/fs/nfsd/vfs.c
index 86e199a758f6c69c508151fb14886f4b5da9c080..d1156a18a79579bf427fe5809dc93d06e241201e 100644
--- a/fs/nfsd/vfs.c
+++ b/fs/nfsd/vfs.c
@@ -1366,6 +1366,8 @@ nfsd_commit(struct svc_rqst *rqstp, struct svc_fh *fhp, struct nfsd_file *nf,
 	loff_t			start, end;
 	struct nfsd_net		*nn;
 
+	trace_nfsd_commit_start(rqstp, fhp, offset, count);
+
 	/*
 	 * Convert the client-provided (offset, count) range to a
 	 * (start, end) range. If the client-provided range falls
@@ -1404,6 +1406,7 @@ nfsd_commit(struct svc_rqst *rqstp, struct svc_fh *fhp, struct nfsd_file *nf,
 	} else
 		nfsd_copy_write_verifier(verf, nn);
 
+	trace_nfsd_commit_done(rqstp, fhp, offset, count);
 	return err;
 }
 

-- 
2.49.0