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-rw-r--r--fs/ocfs2/cluster/tcp.c20
1 files changed, 20 insertions, 0 deletions
diff --git a/fs/ocfs2/cluster/tcp.c b/fs/ocfs2/cluster/tcp.c
index 509e6d5415e2..97de0fbd9f78 100644
--- a/fs/ocfs2/cluster/tcp.c
+++ b/fs/ocfs2/cluster/tcp.c
@@ -1601,7 +1601,15 @@ static void o2net_start_connect(struct work_struct *work)
struct sockaddr_in myaddr = {0, }, remoteaddr = {0, };
int ret = 0, stop;
unsigned int timeout;
+ unsigned int noio_flag;
+ /*
+ * sock_create allocates the sock with GFP_KERNEL. We must set
+ * per-process flag PF_MEMALLOC_NOIO so that all allocations done
+ * by this process are done as if GFP_NOIO was specified. So we
+ * are not reentering filesystem while doing memory reclaim.
+ */
+ noio_flag = memalloc_noio_save();
/* if we're greater we initiate tx, otherwise we accept */
if (o2nm_this_node() <= o2net_num_from_nn(nn))
goto out;
@@ -1710,6 +1718,7 @@ out:
if (mynode)
o2nm_node_put(mynode);
+ memalloc_noio_restore(noio_flag);
return;
}
@@ -1836,6 +1845,15 @@ static int o2net_accept_one(struct socket *sock, int *more)
struct o2nm_node *local_node = NULL;
struct o2net_sock_container *sc = NULL;
struct o2net_node *nn;
+ unsigned int noio_flag;
+
+ /*
+ * sock_create_lite allocates the sock with GFP_KERNEL. We must set
+ * per-process flag PF_MEMALLOC_NOIO so that all allocations done
+ * by this process are done as if GFP_NOIO was specified. So we
+ * are not reentering filesystem while doing memory reclaim.
+ */
+ noio_flag = memalloc_noio_save();
BUG_ON(sock == NULL);
*more = 0;
@@ -1952,6 +1970,8 @@ out:
o2nm_node_put(local_node);
if (sc)
sc_put(sc);
+
+ memalloc_noio_restore(noio_flag);
return ret;
}