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authorYehuda Sadeh <yehuda@hq.newdream.net>2010-02-03 11:00:26 -0800
committerSage Weil <sage@newdream.net>2010-02-11 11:48:48 -0800
commitf5a2041bd96c9f05ff10172b9c814c14f247084e (patch)
tree3c9c47169fa5ad2ec52d278f10d9d2de2237accf
parentb056c8769d1da6a6a80ce780a4b8957b70434a41 (diff)
ceph: put unused osd connections on lru
Instead of removing osd connection immediately when the requests list is empty, put the osd connection on an lru. Only if that osd has not been used for more than a specified time, will it be removed. Signed-off-by: Yehuda Sadeh <yehuda@hq.newdream.net> Signed-off-by: Sage Weil <sage@newdream.net>
-rw-r--r--fs/ceph/osd_client.c76
-rw-r--r--fs/ceph/osd_client.h4
-rw-r--r--fs/ceph/super.c3
-rw-r--r--fs/ceph/super.h2
4 files changed, 76 insertions, 9 deletions
diff --git a/fs/ceph/osd_client.c b/fs/ceph/osd_client.c
index 35c8afea13e..7f8a26fdcc2 100644
--- a/fs/ceph/osd_client.c
+++ b/fs/ceph/osd_client.c
@@ -389,6 +389,7 @@ static struct ceph_osd *create_osd(struct ceph_osd_client *osdc)
atomic_set(&osd->o_ref, 1);
osd->o_osdc = osdc;
INIT_LIST_HEAD(&osd->o_requests);
+ INIT_LIST_HEAD(&osd->o_osd_lru);
osd->o_incarnation = 1;
ceph_con_init(osdc->client->msgr, &osd->o_con);
@@ -422,25 +423,56 @@ static void put_osd(struct ceph_osd *osd)
/*
* remove an osd from our map
*/
-static void remove_osd(struct ceph_osd_client *osdc, struct ceph_osd *osd)
+static void __remove_osd(struct ceph_osd_client *osdc, struct ceph_osd *osd)
{
- dout("remove_osd %p\n", osd);
+ dout("__remove_osd %p\n", osd);
BUG_ON(!list_empty(&osd->o_requests));
rb_erase(&osd->o_node, &osdc->osds);
+ list_del_init(&osd->o_osd_lru);
ceph_con_close(&osd->o_con);
put_osd(osd);
}
+static void __move_osd_to_lru(struct ceph_osd_client *osdc,
+ struct ceph_osd *osd)
+{
+ dout("__move_osd_to_lru %p\n", osd);
+ BUG_ON(!list_empty(&osd->o_osd_lru));
+ list_add_tail(&osd->o_osd_lru, &osdc->osd_lru);
+ osd->lru_ttl = jiffies + osdc->client->mount_args->osd_idle_ttl * HZ;
+}
+
+static void __remove_osd_from_lru(struct ceph_osd *osd)
+{
+ dout("__remove_osd_from_lru %p\n", osd);
+ if (!list_empty(&osd->o_osd_lru))
+ list_del_init(&osd->o_osd_lru);
+}
+
+static void remove_old_osds(struct ceph_osd_client *osdc, int remove_all)
+{
+ struct ceph_osd *osd, *nosd;
+
+ dout("__remove_old_osds %p\n", osdc);
+ mutex_lock(&osdc->request_mutex);
+ list_for_each_entry_safe(osd, nosd, &osdc->osd_lru, o_osd_lru) {
+ if (!remove_all && time_before(jiffies, osd->lru_ttl))
+ break;
+ __remove_osd(osdc, osd);
+ }
+ mutex_unlock(&osdc->request_mutex);
+}
+
/*
* reset osd connect
*/
-static int reset_osd(struct ceph_osd_client *osdc, struct ceph_osd *osd)
+static int __reset_osd(struct ceph_osd_client *osdc, struct ceph_osd *osd)
{
int ret = 0;
- dout("reset_osd %p osd%d\n", osd, osd->o_osd);
+ dout("__reset_osd %p osd%d\n", osd, osd->o_osd);
if (list_empty(&osd->o_requests)) {
- remove_osd(osdc, osd);
+ __remove_osd(osdc, osd);
} else {
ceph_con_close(&osd->o_con);
ceph_con_open(&osd->o_con, &osdc->osdmap->osd_addr[osd->o_osd]);
@@ -533,7 +565,7 @@ static void __unregister_request(struct ceph_osd_client *osdc,
list_del_init(&req->r_osd_item);
if (list_empty(&req->r_osd->o_requests))
- remove_osd(osdc, req->r_osd);
+ __move_osd_to_lru(osdc, req->r_osd);
req->r_osd = NULL;
}
@@ -611,7 +643,7 @@ static int __map_osds(struct ceph_osd_client *osdc,
if (list_empty(&req->r_osd->o_requests)) {
/* try to re-use r_osd if possible */
newosd = get_osd(req->r_osd);
- remove_osd(osdc, newosd);
+ __remove_osd(osdc, newosd);
}
req->r_osd = NULL;
}
@@ -636,8 +668,10 @@ static int __map_osds(struct ceph_osd_client *osdc,
ceph_con_open(&req->r_osd->o_con, &osdc->osdmap->osd_addr[o]);
}
- if (req->r_osd)
+ if (req->r_osd) {
+ __remove_osd_from_lru(req->r_osd);
list_add(&req->r_osd_item, &req->r_osd->o_requests);
+ }
err = 1; /* osd changed */
out:
@@ -744,6 +778,23 @@ static void handle_timeout(struct work_struct *work)
up_read(&osdc->map_sem);
}
+static void handle_osds_timeout(struct work_struct *work)
+{
+ struct ceph_osd_client *osdc =
+ container_of(work, struct ceph_osd_client,
+ osds_timeout_work.work);
+ unsigned long delay =
+ osdc->client->mount_args->osd_idle_ttl * HZ >> 2;
+
+ dout("osds timeout\n");
+ down_read(&osdc->map_sem);
+ remove_old_osds(osdc, 0);
+ up_read(&osdc->map_sem);
+
+ schedule_delayed_work(&osdc->osds_timeout_work,
+ round_jiffies_relative(delay));
+}
+
/*
* handle osd op reply. either call the callback if it is specified,
* or do the completion to wake up the waiting thread.
@@ -881,7 +932,7 @@ static void kick_requests(struct ceph_osd_client *osdc,
ceph_osd_addr(osdc->osdmap,
osd->o_osd),
sizeof(struct ceph_entity_addr)) != 0)
- reset_osd(osdc, osd);
+ __reset_osd(osdc, osd);
}
}
@@ -1195,9 +1246,14 @@ int ceph_osdc_init(struct ceph_osd_client *osdc, struct ceph_client *client)
osdc->timeout_tid = 0;
osdc->last_tid = 0;
osdc->osds = RB_ROOT;
+ INIT_LIST_HEAD(&osdc->osd_lru);
osdc->requests = RB_ROOT;
osdc->num_requests = 0;
INIT_DELAYED_WORK(&osdc->timeout_work, handle_timeout);
+ INIT_DELAYED_WORK(&osdc->osds_timeout_work, handle_osds_timeout);
+
+ schedule_delayed_work(&osdc->osds_timeout_work,
+ round_jiffies_relative(osdc->client->mount_args->osd_idle_ttl * HZ));
err = -ENOMEM;
osdc->req_mempool = mempool_create_kmalloc_pool(10,
@@ -1219,10 +1275,12 @@ out:
void ceph_osdc_stop(struct ceph_osd_client *osdc)
{
cancel_delayed_work_sync(&osdc->timeout_work);
+ cancel_delayed_work_sync(&osdc->osds_timeout_work);
if (osdc->osdmap) {
ceph_osdmap_destroy(osdc->osdmap);
osdc->osdmap = NULL;
}
+ remove_old_osds(osdc, 1);
mempool_destroy(osdc->req_mempool);
ceph_msgpool_destroy(&osdc->msgpool_op);
}
diff --git a/fs/ceph/osd_client.h b/fs/ceph/osd_client.h
index 8d533d9406f..70f31b61f02 100644
--- a/fs/ceph/osd_client.h
+++ b/fs/ceph/osd_client.h
@@ -31,9 +31,11 @@ struct ceph_osd {
struct rb_node o_node;
struct ceph_connection o_con;
struct list_head o_requests;
+ struct list_head o_osd_lru;
struct ceph_authorizer *o_authorizer;
void *o_authorizer_buf, *o_authorizer_reply_buf;
size_t o_authorizer_buf_len, o_authorizer_reply_buf_len;
+ unsigned long lru_ttl;
};
/* an in-flight request */
@@ -90,11 +92,13 @@ struct ceph_osd_client {
struct mutex request_mutex;
struct rb_root osds; /* osds */
+ struct list_head osd_lru; /* idle osds */
u64 timeout_tid; /* tid of timeout triggering rq */
u64 last_tid; /* tid of last request */
struct rb_root requests; /* pending requests */
int num_requests;
struct delayed_work timeout_work;
+ struct delayed_work osds_timeout_work;
#ifdef CONFIG_DEBUG_FS
struct dentry *debugfs_file;
#endif
diff --git a/fs/ceph/super.c b/fs/ceph/super.c
index 3a2548951fe..39aaf29a04a 100644
--- a/fs/ceph/super.c
+++ b/fs/ceph/super.c
@@ -293,6 +293,7 @@ enum {
Opt_rsize,
Opt_osdtimeout,
Opt_mount_timeout,
+ Opt_osd_idle_ttl,
Opt_caps_wanted_delay_min,
Opt_caps_wanted_delay_max,
Opt_readdir_max_entries,
@@ -322,6 +323,7 @@ static match_table_t arg_tokens = {
{Opt_rsize, "rsize=%d"},
{Opt_osdtimeout, "osdtimeout=%d"},
{Opt_mount_timeout, "mount_timeout=%d"},
+ {Opt_osd_idle_ttl, "osd_idle_ttl=%d"},
{Opt_caps_wanted_delay_min, "caps_wanted_delay_min=%d"},
{Opt_caps_wanted_delay_max, "caps_wanted_delay_max=%d"},
{Opt_readdir_max_entries, "readdir_max_entries=%d"},
@@ -367,6 +369,7 @@ static struct ceph_mount_args *parse_mount_args(int flags, char *options,
args->flags = CEPH_OPT_DEFAULT;
args->osd_timeout = 5; /* seconds */
args->mount_timeout = CEPH_MOUNT_TIMEOUT_DEFAULT; /* seconds */
+ args->osd_idle_ttl = CEPH_OSD_IDLE_TTL_DEFAULT; /* seconds */
args->caps_wanted_delay_min = CEPH_CAPS_WANTED_DELAY_MIN_DEFAULT;
args->caps_wanted_delay_max = CEPH_CAPS_WANTED_DELAY_MAX_DEFAULT;
args->rsize = CEPH_MOUNT_RSIZE_DEFAULT;
diff --git a/fs/ceph/super.h b/fs/ceph/super.h
index 770f7b507fc..3930fb685f0 100644
--- a/fs/ceph/super.h
+++ b/fs/ceph/super.h
@@ -53,6 +53,7 @@ struct ceph_mount_args {
struct ceph_entity_addr *mon_addr;
int flags;
int mount_timeout;
+ int osd_idle_ttl;
int caps_wanted_delay_min, caps_wanted_delay_max;
struct ceph_fsid fsid;
struct ceph_entity_addr my_addr;
@@ -71,6 +72,7 @@ struct ceph_mount_args {
* defaults
*/
#define CEPH_MOUNT_TIMEOUT_DEFAULT 60
+#define CEPH_OSD_IDLE_TTL_DEFAULT 60
#define CEPH_MOUNT_RSIZE_DEFAULT (512*1024) /* readahead */
#define CEPH_MSG_MAX_FRONT_LEN (16*1024*1024)