1 files changed, 62 insertions, 0 deletions

diff --git a/meta/recipes-devtools/pseudo/files/toomanyfiles.patch b/meta/recipes-devtools/pseudo/files/toomanyfiles.patch
new file mode 100644
index 0000000000..7319ab29bf
--- /dev/null
+++ b/meta/recipes-devtools/pseudo/files/toomanyfiles.patch
@@ -0,0 +1,62 @@
+Currently if we max out the maximum number of files, pseudo can deadlock, unable to
+accept new connections yet unable to move forward and unblock the other processes
+waiting either.
+
+Rather than hang, when this happens, close out inactive connections, allowing us
+to accept the new ones. The disconnected clients will simply reconnect. There is
+a small risk of data loss here sadly but its better than hanging.
+
+RP
+2017/4/25
+
+Upstream-Status: Pending [Peter is aware of the issue]
+
+Index: pseudo-1.8.2/pseudo_server.c
+===================================================================
+--- pseudo-1.8.2.orig/pseudo_server.c
++++ pseudo-1.8.2/pseudo_server.c
+@@ -581,6 +581,7 @@ pseudo_server_loop(void) {
+        int rc;
+        int fd;
+        int loop_timeout = pseudo_server_timeout;
++       int hitmaxfiles;
+ 
+        clients = malloc(16 * sizeof(*clients));
+ 
+@@ -597,6 +598,7 @@ pseudo_server_loop(void) {
+        active_clients = 1;
+        max_clients = 16;
+        highest_client = 0;
++       hitmaxfiles = 0;
+ 
+        pseudo_debug(PDBGF_SERVER, "server loop started.\n");
+        if (listen_fd < 0) {
+@@ -663,10 +665,18 @@ pseudo_server_loop(void) {
+                                                message_time.tv_usec -= 1000000;
+                                                ++message_time.tv_sec;
+                                        }
++                               } else if (hitmaxfiles) {
++                                       /* In theory there is a potential race here where if we close a client, 
++                                          it may have sent us a fastop message which we don't act upon.
++                                          If we don't close a filehandle we'll loop indefinitely thought. 
++                                          Only close one per loop iteration in the interests of caution */
++                                       close_client(i);
++                                       hitmaxfiles = 0;
+                                }
+                                if (die_forcefully)
+                                        break;
+                        }
++                       hitmaxfiles = 0;
+                        if (!die_forcefully && 
+                            (FD_ISSET(clients[0].fd, &events) ||
+                             FD_ISSET(clients[0].fd, &reads))) {
+@@ -688,6 +698,9 @@ pseudo_server_loop(void) {
+                                          */
+                                         pseudo_server_timeout = DEFAULT_PSEUDO_SERVER_TIMEOUT;
+                                         die_peacefully = 0;
++                               } else if (errno == EMFILE) {
++                                       hitmaxfiles = 1;
++                                       pseudo_debug(PDBGF_SERVER, "Hit max open files, dropping a client.\n");
+                                }
+                        }
+                        pseudo_debug(PDBGF_SERVER, "server loop complete [%d clients left]\n", active_clients);