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NFSD: Move nfsd_file_trace_alloc() tracepoint

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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>
This commit is contained in:
Chuck Lever 2022-07-08 14:26:49 -04:00
parent be0230069f
commit b40a283947
2 changed files with 25 additions and 2 deletions
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2
fs/nfsd/filecache.c
View File

@ -303,7 +303,6 @@ 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;
}
@ -1126,6 +1125,7 @@ out_status:
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) {

25
fs/nfsd/trace.h
View File

@ -774,12 +774,35 @@ 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,