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| author | Yan, Zheng <zyan@redhat.com> | 2017-09-11 10:36:28 +0800 |
|---|---|---|
| committer | Ilya Dryomov <idryomov@gmail.com> | 2017-11-13 12:11:27 +0100 |
| commit | 4deb14a2593dfade102dd94a803a63cf620cfd56 (patch) | |
| tree | 4d50d2b4f35e28106175ecef8ac5aca7bdf2a562 /fs/ceph | |
| parent | c6db84723363790160a89dee4554ad2f0687a0c5 (diff) | |
| download | lwn-4deb14a2593dfade102dd94a803a63cf620cfd56.tar.gz lwn-4deb14a2593dfade102dd94a803a63cf620cfd56.zip | |
ceph: optimize flock encoding during reconnect
Don't malloc if there is no flock.
Signed-off-by: "Yan, Zheng" <zyan@redhat.com>
Reviewed-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
Diffstat (limited to 'fs/ceph')
| -rw-r--r-- | fs/ceph/locks.c | 17 | ||||
| -rw-r--r-- | fs/ceph/mds_client.c | 34 |
2 files changed, 30 insertions, 21 deletions
diff --git a/fs/ceph/locks.c b/fs/ceph/locks.c index 2927f3bc2fc9..aaea82076849 100644 --- a/fs/ceph/locks.c +++ b/fs/ceph/locks.c @@ -431,19 +431,22 @@ int ceph_locks_to_pagelist(struct ceph_filelock *flocks, if (err) goto out_fail; - err = ceph_pagelist_append(pagelist, flocks, - num_fcntl_locks * sizeof(*flocks)); - if (err) - goto out_fail; + if (num_fcntl_locks > 0) { + err = ceph_pagelist_append(pagelist, flocks, + num_fcntl_locks * sizeof(*flocks)); + if (err) + goto out_fail; + } nlocks = cpu_to_le32(num_flock_locks); err = ceph_pagelist_append(pagelist, &nlocks, sizeof(nlocks)); if (err) goto out_fail; - err = ceph_pagelist_append(pagelist, - &flocks[num_fcntl_locks], - num_flock_locks * sizeof(*flocks)); + if (num_flock_locks > 0) { + err = ceph_pagelist_append(pagelist, &flocks[num_fcntl_locks], + num_flock_locks * sizeof(*flocks)); + } out_fail: return err; } diff --git a/fs/ceph/mds_client.c b/fs/ceph/mds_client.c index c8a811db387a..295cf5e42ea9 100644 --- a/fs/ceph/mds_client.c +++ b/fs/ceph/mds_client.c @@ -2899,26 +2899,32 @@ static int encode_caps_cb(struct inode *inode, struct ceph_cap *cap, if (recon_state->msg_version >= 2) { int num_fcntl_locks, num_flock_locks; - struct ceph_filelock *flocks; + struct ceph_filelock *flocks = NULL; size_t struct_len, total_len = 0; u8 struct_v = 0; encode_again: ceph_count_locks(inode, &num_fcntl_locks, &num_flock_locks); - flocks = kmalloc((num_fcntl_locks+num_flock_locks) * - sizeof(struct ceph_filelock), GFP_NOFS); - if (!flocks) { - err = -ENOMEM; - goto out_free; - } - err = ceph_encode_locks_to_buffer(inode, flocks, - num_fcntl_locks, - num_flock_locks); - if (err) { + if (num_fcntl_locks + num_flock_locks > 0) { + flocks = kmalloc((num_fcntl_locks + num_flock_locks) * + sizeof(struct ceph_filelock), GFP_NOFS); + if (!flocks) { + err = -ENOMEM; + goto out_free; + } + err = ceph_encode_locks_to_buffer(inode, flocks, + num_fcntl_locks, + num_flock_locks); + if (err) { + kfree(flocks); + flocks = NULL; + if (err == -ENOSPC) + goto encode_again; + goto out_free; + } + } else { kfree(flocks); - if (err == -ENOSPC) - goto encode_again; - goto out_free; + flocks = NULL; } if (recon_state->msg_version >= 3) { |