libceph: remove 'osdtimeout' option

(cherry picked from commit 83aff95eb9d60aff5497e9f44a2ae906b86d8e88)

This would reset a connection with any OSD that had an outstanding
request that was taking more than N seconds.  The idea was that if the
OSD was buggy, the client could compensate by resending the request.

In reality, this only served to hide server bugs, and we haven't
actually seen such a bug in quite a while.  Moreover, the userspace
client code never did this.

More importantly, often the request is taking a long time because the
OSD is trying to recover, or overloaded, and killing the connection
and retrying would only make the situation worse by giving the OSD
more work to do.

Signed-off-by: Sage Weil <sage@inktank.com>
Reviewed-by: Alex Elder <elder@inktank.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/fs/ceph/super.c b/fs/ceph/super.c
index 2eb43f211325860a9d8c4eb870fa32c494568966..e07989934e969d153b53ee02b15d59dd73f412df 100644 (file)
--- a/fs/ceph/super.c
+++ b/fs/ceph/super.c
@@ -403,8 +403,6 @@ static int ceph_show_options(struct seq_file *m, struct dentry *root)
                seq_printf(m, ",mount_timeout=%d", opt->mount_timeout);
        if (opt->osd_idle_ttl != CEPH_OSD_IDLE_TTL_DEFAULT)
                seq_printf(m, ",osd_idle_ttl=%d", opt->osd_idle_ttl);
-       if (opt->osd_timeout != CEPH_OSD_TIMEOUT_DEFAULT)
-               seq_printf(m, ",osdtimeout=%d", opt->osd_timeout);
        if (opt->osd_keepalive_timeout != CEPH_OSD_KEEPALIVE_DEFAULT)
                seq_printf(m, ",osdkeepalivetimeout=%d",
                           opt->osd_keepalive_timeout);

diff --git a/include/linux/ceph/libceph.h b/include/linux/ceph/libceph.h
index 6470792b13d3c79734a9a3ae7321a9df691cec78..084d3c622b12a8ac58ad626da2e8f325d6d3d1c9 100644 (file)
--- a/include/linux/ceph/libceph.h
+++ b/include/linux/ceph/libceph.h
@@ -43,7 +43,6 @@ struct ceph_options {
        struct ceph_entity_addr my_addr;
        int mount_timeout;
        int osd_idle_ttl;
-       int osd_timeout;
        int osd_keepalive_timeout;
 
        /*
@@ -63,7 +62,6 @@ struct ceph_options {
  * defaults
  */
 #define CEPH_MOUNT_TIMEOUT_DEFAULT  60
-#define CEPH_OSD_TIMEOUT_DEFAULT    60  /* seconds */
 #define CEPH_OSD_KEEPALIVE_DEFAULT  5
 #define CEPH_OSD_IDLE_TTL_DEFAULT    60
 

diff --git a/net/ceph/ceph_common.c b/net/ceph/ceph_common.c
index a8020293f34210620eff72f6193ee35e064f5d69..ee71ea26777ae892fafd13a8338b3f556d9f427b 100644 (file)
--- a/net/ceph/ceph_common.c
+++ b/net/ceph/ceph_common.c
@@ -305,7 +305,6 @@ ceph_parse_options(char *options, const char *dev_name,
 
        /* start with defaults */
        opt->flags = CEPH_OPT_DEFAULT;
-       opt->osd_timeout = CEPH_OSD_TIMEOUT_DEFAULT;
        opt->osd_keepalive_timeout = CEPH_OSD_KEEPALIVE_DEFAULT;
        opt->mount_timeout = CEPH_MOUNT_TIMEOUT_DEFAULT; /* seconds */
        opt->osd_idle_ttl = CEPH_OSD_IDLE_TTL_DEFAULT;   /* seconds */
@@ -391,7 +390,7 @@ ceph_parse_options(char *options, const char *dev_name,
 
                        /* misc */
                case Opt_osdtimeout:
-                       opt->osd_timeout = intval;
+                       pr_warning("ignoring deprecated osdtimeout option\n");
                        break;
                case Opt_osdkeepalivetimeout:
                        opt->osd_keepalive_timeout = intval;

diff --git a/net/ceph/osd_client.c b/net/ceph/osd_client.c
index 138a30d98ac4a9928a775bfc9dc25c35de5bc117..fc4e60e73552135ea0bf462f32fae4ac39ec4229 100644 (file)
--- a/net/ceph/osd_client.c
+++ b/net/ceph/osd_client.c
@@ -608,14 +608,6 @@ static void __kick_osd_requests(struct ceph_osd_client *osdc,
        }
 }
 
-static void kick_osd_requests(struct ceph_osd_client *osdc,
-                             struct ceph_osd *kickosd)
-{
-       mutex_lock(&osdc->request_mutex);
-       __kick_osd_requests(osdc, kickosd);
-       mutex_unlock(&osdc->request_mutex);
-}
-
 /*
  * If the osd connection drops, we need to resubmit all requests.
  */
@@ -629,7 +621,9 @@ static void osd_reset(struct ceph_connection *con)
        dout("osd_reset osd%d\n", osd->o_osd);
        osdc = osd->o_osdc;
        down_read(&osdc->map_sem);
-       kick_osd_requests(osdc, osd);
+       mutex_lock(&osdc->request_mutex);
+       __kick_osd_requests(osdc, osd);
+       mutex_unlock(&osdc->request_mutex);
        send_queued(osdc);
        up_read(&osdc->map_sem);
 }
@@ -1093,12 +1087,10 @@ static void handle_timeout(struct work_struct *work)
 {
        struct ceph_osd_client *osdc =
                container_of(work, struct ceph_osd_client, timeout_work.work);
-       struct ceph_osd_request *req, *last_req = NULL;
+       struct ceph_osd_request *req;
        struct ceph_osd *osd;
-       unsigned long timeout = osdc->client->options->osd_timeout * HZ;
        unsigned long keepalive =
                osdc->client->options->osd_keepalive_timeout * HZ;
-       unsigned long last_stamp = 0;
        struct list_head slow_osds;
        dout("timeout\n");
        down_read(&osdc->map_sem);
@@ -1107,37 +1099,6 @@ static void handle_timeout(struct work_struct *work)
 
        mutex_lock(&osdc->request_mutex);
 
-       /*
-        * reset osds that appear to be _really_ unresponsive.  this
-        * is a failsafe measure.. we really shouldn't be getting to
-        * this point if the system is working properly.  the monitors
-        * should mark the osd as failed and we should find out about
-        * it from an updated osd map.
-        */
-       while (timeout && !list_empty(&osdc->req_lru)) {
-               req = list_entry(osdc->req_lru.next, struct ceph_osd_request,
-                                r_req_lru_item);
-
-               /* hasn't been long enough since we sent it? */
-               if (time_before(jiffies, req->r_stamp + timeout))
-                       break;
-
-               /* hasn't been long enough since it was acked? */
-               if (req->r_request->ack_stamp == 0 ||
-                   time_before(jiffies, req->r_request->ack_stamp + timeout))
-                       break;
-
-               BUG_ON(req == last_req && req->r_stamp == last_stamp);
-               last_req = req;
-               last_stamp = req->r_stamp;
-
-               osd = req->r_osd;
-               BUG_ON(!osd);
-               pr_warning(" tid %llu timed out on osd%d, will reset osd\n",
-                          req->r_tid, osd->o_osd);
-               __kick_osd_requests(osdc, osd);
-       }
-
        /*
         * ping osds that are a bit slow.  this ensures that if there
         * is a break in the TCP connection we will notice, and reopen