This is a note to let you know that I've just added the patch titled
NFSD: Move nfsd_file_trace_alloc() tracepoint
to the 5.15-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
nfsd-move-nfsd_file_trace_alloc-tracepoint.patch
and it can be found in the queue-5.15 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 174625a934c211aa994af5eba4c9a5fcdcd44bf8
Author: Chuck Lever <chuck.lever@xxxxxxxxxx>
Date: Fri Jul 8 14:26:49 2022 -0400
NFSD: Move nfsd_file_trace_alloc() tracepoint
[ Upstream commit b40a2839470cd62ed68c4a32d72a18ee8975b1ac ]
Avoid recording the allocation of an nfsd_file item that is
immediately released because a matching item was already
inserted in the hash.
Reviewed-by: Jeff Layton <jlayton@xxxxxxxxxx>
Signed-off-by: Chuck Lever <chuck.lever@xxxxxxxxxx>
diff --git a/fs/nfsd/filecache.c b/fs/nfsd/filecache.c
index 85813affb8abf..26cfae138b906 100644
--- a/fs/nfsd/filecache.c
+++ b/fs/nfsd/filecache.c
@@ -302,7 +302,6 @@ nfsd_file_alloc(struct nfsd_file_lookup_key *key, unsigned int may)
refcount_set(&nf->nf_ref, 2);
nf->nf_may = key->need;
nf->nf_mark = NULL;
- trace_nfsd_file_alloc(nf);
}
return nf;
}
@@ -1125,6 +1124,7 @@ nfsd_file_do_acquire(struct svc_rqst *rqstp, struct svc_fh *fhp,
return status;
open_file:
+ trace_nfsd_file_alloc(nf);
nf->nf_mark = nfsd_file_mark_find_or_create(nf);
if (nf->nf_mark) {
if (open) {
diff --git a/fs/nfsd/trace.h b/fs/nfsd/trace.h
index 2d0bfcccd19c7..83c6a7d37dc84 100644
--- a/fs/nfsd/trace.h
+++ b/fs/nfsd/trace.h
@@ -773,12 +773,35 @@ DEFINE_EVENT(nfsd_file_class, name, \
TP_PROTO(struct nfsd_file *nf), \
TP_ARGS(nf))
-DEFINE_NFSD_FILE_EVENT(nfsd_file_alloc);
DEFINE_NFSD_FILE_EVENT(nfsd_file_put_final);
DEFINE_NFSD_FILE_EVENT(nfsd_file_unhash);
DEFINE_NFSD_FILE_EVENT(nfsd_file_put);
DEFINE_NFSD_FILE_EVENT(nfsd_file_unhash_and_dispose);
+TRACE_EVENT(nfsd_file_alloc,
+ TP_PROTO(
+ const struct nfsd_file *nf
+ ),
+ TP_ARGS(nf),
+ TP_STRUCT__entry(
+ __field(const void *, nf_inode)
+ __field(unsigned long, nf_flags)
+ __field(unsigned long, nf_may)
+ __field(unsigned int, nf_ref)
+ ),
+ TP_fast_assign(
+ __entry->nf_inode = nf->nf_inode;
+ __entry->nf_flags = nf->nf_flags;
+ __entry->nf_ref = refcount_read(&nf->nf_ref);
+ __entry->nf_may = nf->nf_may;
+ ),
+ TP_printk("inode=%p ref=%u flags=%s may=%s",
+ __entry->nf_inode, __entry->nf_ref,
+ show_nf_flags(__entry->nf_flags),
+ show_nfsd_may_flags(__entry->nf_may)
+ )
+);
+
TRACE_EVENT(nfsd_file_acquire,
TP_PROTO(
const struct svc_rqst *rqstp,
