The patch titled
Subject: ocfs2/cluster: replace the interrupt safe spinlocks with common ones
has been added to the -mm tree. Its filename is
ocfs2-cluster-replace-the-interrupt-safe-spinlocks-with-common-ones.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/ocfs2-cluster-replace-the-interrupt-safe-spinlocks-with-common-ones.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/ocfs2-cluster-replace-the-interrupt-safe-spinlocks-with-common-ones.patch
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------------------------------------------------------
From: jiangyiwen <jiangyiwen@xxxxxxxxxx>
Subject: ocfs2/cluster: replace the interrupt safe spinlocks with common ones
There actually no hardware or software interrupts in the context
which using o2hb_live_lock, so we don't need to worry about race
conditions caused by irq/softirq with spinlock held. Turning off
irq is not good for system performance after all. Just replace
them with a non interrupt safe function.
Signed-off-by: Yiwen Jiang <jiangyiwen@xxxxxxxxxx>
Reviewed-by: Joseph Qi <joseph.qi@xxxxxxxxxx>
Cc: Mark Fasheh <mfasheh@xxxxxxx>
Cc: Joel Becker <jlbec@xxxxxxxxxxxx>
Cc: Junxiao Bi <junxiao.bi@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
fs/ocfs2/cluster/heartbeat.c | 10 ++++------
1 file changed, 4 insertions(+), 6 deletions(-)
diff -puN fs/ocfs2/cluster/heartbeat.c~ocfs2-cluster-replace-the-interrupt-safe-spinlocks-with-common-ones fs/ocfs2/cluster/heartbeat.c
--- a/fs/ocfs2/cluster/heartbeat.c~ocfs2-cluster-replace-the-interrupt-safe-spinlocks-with-common-ones
+++ a/fs/ocfs2/cluster/heartbeat.c
@@ -287,7 +287,6 @@ struct o2hb_bio_wait_ctxt {
static void o2hb_write_timeout(struct work_struct *work)
{
int failed, quorum;
- unsigned long flags;
struct o2hb_region *reg =
container_of(work, struct o2hb_region,
hr_write_timeout_work.work);
@@ -297,14 +296,14 @@ static void o2hb_write_timeout(struct wo
jiffies_to_msecs(jiffies - reg->hr_last_timeout_start));
if (o2hb_global_heartbeat_active()) {
- spin_lock_irqsave(&o2hb_live_lock, flags);
+ spin_lock(&o2hb_live_lock);
if (test_bit(reg->hr_region_num, o2hb_quorum_region_bitmap))
set_bit(reg->hr_region_num, o2hb_failed_region_bitmap);
failed = bitmap_weight(o2hb_failed_region_bitmap,
O2NM_MAX_REGIONS);
quorum = bitmap_weight(o2hb_quorum_region_bitmap,
O2NM_MAX_REGIONS);
- spin_unlock_irqrestore(&o2hb_live_lock, flags);
+ spin_unlock(&o2hb_live_lock);
mlog(ML_HEARTBEAT, "Number of regions %d, failed regions %d\n",
quorum, failed);
@@ -2425,11 +2424,10 @@ EXPORT_SYMBOL_GPL(o2hb_check_node_heartb
int o2hb_check_node_heartbeating_no_sem(u8 node_num)
{
unsigned long testing_map[BITS_TO_LONGS(O2NM_MAX_NODES)];
- unsigned long flags;
- spin_lock_irqsave(&o2hb_live_lock, flags);
+ spin_lock(&o2hb_live_lock);
o2hb_fill_node_map_from_callback(testing_map, sizeof(testing_map));
- spin_unlock_irqrestore(&o2hb_live_lock, flags);
+ spin_unlock(&o2hb_live_lock);
if (!test_bit(node_num, testing_map)) {
mlog(ML_HEARTBEAT,
"node (%u) does not have heartbeating enabled.\n",
_
Patches currently in -mm which might be from jiangyiwen@xxxxxxxxxx are
ocfs2-cluster-replace-the-interrupt-safe-spinlocks-with-common-ones.patch
ocfs2-avoid-occurring-deadlock-by-changing-ocfs2_wq-from-global-to-local.patch
ocfs2-solve-a-problem-of-crossing-the-boundary-in-updating-backups.patch
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