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| author | Sage Weil <sage@inktank.com> | 2012-07-20 15:33:04 -0700 |
|---|---|---|
| committer | Sage Weil <sage@inktank.com> | 2012-07-30 18:15:56 -0700 |
| commit | 00650931e52e97fe64096bec167f5a6780dfd94a (patch) | |
| tree | ec6f3675e8229ac8dc3628a7c3ae7f2d2bbafceb /net | |
| parent | 3b5ede07b55b52c3be27749d183d87257d032065 (diff) | |
| download | linux-3.10-00650931e52e97fe64096bec167f5a6780dfd94a.tar.gz linux-3.10-00650931e52e97fe64096bec167f5a6780dfd94a.tar.bz2 linux-3.10-00650931e52e97fe64096bec167f5a6780dfd94a.zip | |
libceph: move msgr clear_standby under con mutex protection
Avoid dropping and retaking con->mutex in the ceph_con_send() case by
leaving locking up to the caller.
Signed-off-by: Sage Weil <sage@inktank.com>
Diffstat (limited to 'net')
| -rw-r--r-- | net/ceph/messenger.c | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/net/ceph/messenger.c b/net/ceph/messenger.c index 9aaf539942a..1a3cb4a4f18 100644 --- a/net/ceph/messenger.c +++ b/net/ceph/messenger.c @@ -2441,12 +2441,10 @@ static void clear_standby(struct ceph_connection *con) { /* come back from STANDBY? */ if (test_and_clear_bit(STANDBY, &con->state)) { - mutex_lock(&con->mutex); dout("clear_standby %p and ++connect_seq\n", con); con->connect_seq++; WARN_ON(test_bit(WRITE_PENDING, &con->flags)); WARN_ON(test_bit(KEEPALIVE_PENDING, &con->flags)); - mutex_unlock(&con->mutex); } } @@ -2483,11 +2481,12 @@ void ceph_con_send(struct ceph_connection *con, struct ceph_msg *msg) le32_to_cpu(msg->hdr.front_len), le32_to_cpu(msg->hdr.middle_len), le32_to_cpu(msg->hdr.data_len)); + + clear_standby(con); mutex_unlock(&con->mutex); /* if there wasn't anything waiting to send before, queue * new work */ - clear_standby(con); if (test_and_set_bit(WRITE_PENDING, &con->flags) == 0) queue_con(con); } @@ -2574,7 +2573,9 @@ void ceph_msg_revoke_incoming(struct ceph_msg *msg) void ceph_con_keepalive(struct ceph_connection *con) { dout("con_keepalive %p\n", con); + mutex_lock(&con->mutex); clear_standby(con); + mutex_unlock(&con->mutex); if (test_and_set_bit(KEEPALIVE_PENDING, &con->flags) == 0 && test_and_set_bit(WRITE_PENDING, &con->flags) == 0) queue_con(con); |