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authorChuck Lever <chuck.lever@oracle.com>2020-05-12 17:14:05 -0400
committerAnna Schumaker <Anna.Schumaker@Netapp.com>2020-06-11 13:33:48 -0400
commitfd2b6121415539c394f7c610da5ffa6df919db46 (patch)
treedd9a5624886b345343acc040013dddd7047529c6 /fs/nfs/read.c
parent5be5945864ea143fda628e8179c8474457af1f43 (diff)
NFS: Trace short NFS READs
A short read can generate an -EIO error without there being an error on the wire. This tracepoint acts as an eyecatcher when there is no obvious I/O error. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
Diffstat (limited to 'fs/nfs/read.c')
-rw-r--r--fs/nfs/read.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/fs/nfs/read.c b/fs/nfs/read.c
index 13b22e898116..eb854f1f86e2 100644
--- a/fs/nfs/read.c
+++ b/fs/nfs/read.c
@@ -264,6 +264,8 @@ static void nfs_readpage_retry(struct rpc_task *task,
/* This is a short read! */
nfs_inc_stats(hdr->inode, NFSIOS_SHORTREAD);
+ trace_nfs_readpage_short(task, hdr);
+
/* Has the server at least made some progress? */
if (resp->count == 0) {
nfs_set_pgio_error(hdr, -EIO, argp->offset);