From: "Yan, Zheng" <zheng.z.yan@xxxxxxxxx>
Opening remote dentry while holding locks may cause dead lock. For example,
'discover' is blocked by a xlocked dentry, the request holding the xlock
is blocked by the locks hold by the readdir request.
Signed-off-by: Yan, Zheng <zheng.z.yan@xxxxxxxxx>
---
src/mds/Server.cc | 2 ++
1 file changed, 2 insertions(+)
diff --git a/src/mds/Server.cc b/src/mds/Server.cc
index 119af98..2531005 100644
--- a/src/mds/Server.cc
+++ b/src/mds/Server.cc
@@ -2901,6 +2901,8 @@ void Server::handle_client_readdir(MDRequest *mdr)
break;
}
+ mds->locker->drop_locks(mdr);
+ mdr->drop_local_auth_pins();
mdcache->open_remote_dentry(dn, dnp, new C_MDS_RetryRequest(mdcache, mdr));
return;
}
--
1.7.11.7
--
To unsubscribe from this list: send the line "unsubscribe ceph-devel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
