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ceph: avoid iput() while holding spinlock in ceph_dir_fsync 

ceph_mdsc_put_request() can call iput(), which can sleep.  Don't do that.

Fixes: #1812
Signed-off-by: Sage Weil <sage@newdream.net>
This commit is contained in:
Sage Weil 2012-01-03 10:09:07 -08:00
parent ee6b1baf67
commit 2ff179e650
1 changed files with 2 additions and 1 deletions
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3
fs/ceph/dir.c
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@ -1218,6 +1218,7 @@ static int ceph_dir_fsync(struct file *file, loff_t start, loff_t end,
do {
ceph_mdsc_get_request(req);
spin_unlock(&ci->i_unsafe_lock);
dout("dir_fsync %p wait on tid %llu (until %llu)\n",
inode, req->r_tid, last_tid);
if (req->r_timeout) {
@ -1230,9 +1231,9 @@ static int ceph_dir_fsync(struct file *file, loff_t start, loff_t end,
} else {
wait_for_completion(&req->r_safe_completion);
}
spin_lock(&ci->i_unsafe_lock);
ceph_mdsc_put_request(req);
spin_lock(&ci->i_unsafe_lock);
if (ret || list_empty(head))
break;
req = list_entry(head->next,