5.10-stable review patch. If anyone has any objections, please let me know.
------------------
From: Chuck Lever chuck.lever@oracle.com
[ 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@kernel.org Signed-off-by: Chuck Lever chuck.lever@oracle.com Signed-off-by: Sasha Levin sashal@kernel.org --- fs/nfsd/filecache.c | 2 +- fs/nfsd/trace.h | 25 ++++++++++++++++++++++++- 2 files changed, 25 insertions(+), 2 deletions(-)
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 ce391ba2f1ca5..22c1fb735f1a7 100644 --- a/fs/nfsd/trace.h +++ b/fs/nfsd/trace.h @@ -739,12 +739,35 @@ 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,