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| author |   Xiubo Li <xiubli@redhat.com> | 2020-03-19 23:44:59 -0400 |
|---|---|---|
| committer |   Ilya Dryomov <idryomov@gmail.com> | 2020-06-01 13:22:51 +0200 |
| commit | f9009efac49c830460f55b9f6c08ee0d76f31b0d (patch) | |
| tree | 385a58979017657cc29390c7c1aee07e1f61e476 /fs/ceph/dir.c | |
| parent | Linux 5.7 (diff) | |
| download | linux-dev-f9009efac49c830460f55b9f6c08ee0d76f31b0d.tar.xz linux-dev-f9009efac49c830460f55b9f6c08ee0d76f31b0d.zip | |
ceph: add dentry lease metric support
For dentry leases, only count the hit/miss info triggered from the vfs
calls. For the cases like request reply handling and ceph_trim_dentries,
ignore them.
For now, these are only viewable using debugfs. Future patches will
allow the client to send the stats to the MDS.
The output looks like:
item total miss hit
-------------------------------------------------
d_lease 11 7 141
URL: https://tracker.ceph.com/issues/43215
Signed-off-by: Xiubo Li <xiubli@redhat.com>
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
Diffstat (limited to 'fs/ceph/dir.c')
| -rw-r--r-- | fs/ceph/dir.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/fs/ceph/dir.c b/fs/ceph/dir.c index 4c4202c93b71..44cf85136ad5 100644 --- a/fs/ceph/dir.c +++ b/fs/ceph/dir.c @@ -38,6 +38,8 @@ static int __dir_lease_try_check(const struct dentry *dentry); static int ceph_d_init(struct dentry *dentry) { struct ceph_dentry_info *di; + struct ceph_fs_client *fsc = ceph_sb_to_client(dentry->d_sb); + struct ceph_mds_client *mdsc = fsc->mdsc; di = kmem_cache_zalloc(ceph_dentry_cachep, GFP_KERNEL); if (!di) @@ -48,6 +50,9 @@ static int ceph_d_init(struct dentry *dentry) di->time = jiffies; dentry->d_fsdata = di; INIT_LIST_HEAD(&di->lease_list); + + atomic64_inc(&mdsc->metric.total_dentries); + return 0; } @@ -1709,6 +1714,8 @@ static int ceph_d_revalidate(struct dentry *dentry, unsigned int flags) if (flags & LOOKUP_RCU) return -ECHILD; + percpu_counter_inc(&mdsc->metric.d_lease_mis); + op = ceph_snap(dir) == CEPH_SNAPDIR ? CEPH_MDS_OP_LOOKUPSNAP : CEPH_MDS_OP_LOOKUP; req = ceph_mdsc_create_request(mdsc, op, USE_ANY_MDS); @@ -1740,6 +1747,8 @@ static int ceph_d_revalidate(struct dentry *dentry, unsigned int flags) dout("d_revalidate %p lookup result=%d\n", dentry, err); } + } else { + percpu_counter_inc(&mdsc->metric.d_lease_hit); } dout("d_revalidate %p %s\n", dentry, valid ? "valid" : "invalid"); @@ -1782,9 +1791,12 @@ static int ceph_d_delete(const struct dentry *dentry) static void ceph_d_release(struct dentry *dentry) { struct ceph_dentry_info *di = ceph_dentry(dentry); + struct ceph_fs_client *fsc = ceph_sb_to_client(dentry->d_sb); dout("d_release %p\n", dentry); + atomic64_dec(&fsc->mdsc->metric.total_dentries); + spin_lock(&dentry->d_lock); __dentry_lease_unlist(di); dentry->d_fsdata = NULL; |