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ocfs2/cluster: Track bitmap of live heartbeat regions

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A heartbeat region becomes live (or active) after a fixed number of (steady)
iterations.

Signed-off-by: Sunil Mushran <sunil.mushran@oracle.com>
This commit is contained in:
Sunil Mushran 2010-10-06 17:55:18 -07:00
parent 536f0741f3
commit e7d656baf6
1 changed files with 8 additions and 1 deletions
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9
fs/ocfs2/cluster/heartbeat.c
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@ -65,8 +65,10 @@ static DECLARE_WAIT_QUEUE_HEAD(o2hb_steady_queue);
/*
* In global heartbeat, we maintain a series of region bitmaps.
* - o2hb_region_bitmap allows us to limit the region number to max region.
* - o2hb_live_region_bitmap tracks live regions (seen steady iterations).
*/
static unsigned long o2hb_region_bitmap[BITS_TO_LONGS(O2NM_MAX_REGIONS)];
static unsigned long o2hb_live_region_bitmap[BITS_TO_LONGS(O2NM_MAX_REGIONS)];
#define O2HB_DB_TYPE_LIVENODES 0
struct o2hb_debug_buf {
@ -1135,6 +1137,7 @@ int o2hb_init(void)
memset(o2hb_live_node_bitmap, 0, sizeof(o2hb_live_node_bitmap));
memset(o2hb_region_bitmap, 0, sizeof(o2hb_region_bitmap));
memset(o2hb_live_region_bitmap, 0, sizeof(o2hb_live_region_bitmap));
return o2hb_debug_init();
}
@ -1563,6 +1566,8 @@ static ssize_t o2hb_region_dev_write(struct o2hb_region *reg,
/* Ok, we were woken. Make sure it wasn't by drop_item() */
spin_lock(&o2hb_live_lock);
hb_task = reg->hr_task;
if (o2hb_global_heartbeat_active())
set_bit(reg->hr_region_num, o2hb_live_region_bitmap);
spin_unlock(&o2hb_live_lock);
if (hb_task)
@ -1751,8 +1756,10 @@ static void o2hb_heartbeat_group_drop_item(struct config_group *group,
/* stop the thread when the user removes the region dir */
spin_lock(&o2hb_live_lock);
if (o2hb_global_heartbeat_active())
if (o2hb_global_heartbeat_active()) {
clear_bit(reg->hr_region_num, o2hb_region_bitmap);
clear_bit(reg->hr_region_num, o2hb_live_region_bitmap);
}
hb_task = reg->hr_task;
reg->hr_task = NULL;
spin_unlock(&o2hb_live_lock);