Spelling adjustments

src/backend/commands/async.c

@@ -1654,7 +1654,7 @@ asyncQueueFillWarning(void)
  * behind.  Waken them anyway if they're far enough behind, so that they'll
  * advance their queue position pointers, allowing the global tail to advance.
  *
- * Since we know the BackendId and the Pid the signalling is quite cheap.
+ * Since we know the BackendId and the Pid the signaling is quite cheap.
  */
 static void
 SignalBackends(void)

src/backend/commands/vacuum.c

@@ -1638,7 +1638,7 @@ vac_truncate_clog(TransactionId frozenXID,
 	 * Update the wrap limit for GetNewTransactionId and creation of new
 	 * MultiXactIds.  Note: these functions will also signal the postmaster
 	 * for an(other) autovac cycle if needed.   XXX should we avoid possibly
-	 * signalling twice?
+	 * signaling twice?
 	 */
 	SetTransactionIdLimit(frozenXID, oldestxid_datoid);
 	SetMultiXactIdLimit(minMulti, minmulti_datoid, false);

src/backend/jit/llvm/llvmjit_expr.c

@@ -2448,7 +2448,7 @@ BuildV1Call(LLVMJitContext *context, LLVMBuilderRef b,
 		*v_fcinfo_isnull = LLVMBuildLoad(b, v_fcinfo_isnullp, "");
 
 	/*
-	 * Add lifetime-end annotation, signalling that writes to memory don't
+	 * Add lifetime-end annotation, signaling that writes to memory don't
 	 * have to be retained (important for inlining potential).
 	 */
 	{

src/backend/port/win32/socket.c

@@ -618,7 +618,7 @@ pgwin32_select(int nfds, fd_set *readfds, fd_set *writefds, fd_set *exceptfds, c
 	if (r != WAIT_TIMEOUT && r != WAIT_IO_COMPLETION && r != (WAIT_OBJECT_0 + numevents))
 	{
 		/*
-		 * We scan all events, even those not signalled, in case more than one
+		 * We scan all events, even those not signaled, in case more than one
 		 * event has been tagged but Wait.. can only return one.
 		 */
 		WSANETWORKEVENTS resEvents;

src/backend/port/win32/timer.c

@@ -48,7 +48,7 @@ pg_timer_thread(LPVOID param)
 		r = WaitForSingleObjectEx(timerCommArea.event, waittime, FALSE);
 		if (r == WAIT_OBJECT_0)
 		{
-			/* Event signalled from main thread, change the timer */
+			/* Event signaled from main thread, change the timer */
 			EnterCriticalSection(&timerCommArea.crit_sec);
 			if (timerCommArea.value.it_value.tv_sec == 0 &&
 				timerCommArea.value.it_value.tv_usec == 0)

src/backend/postmaster/autovacuum.c

@@ -653,7 +653,7 @@ AutoVacLauncherMain(int argc, char *argv[])
 		HandleAutoVacLauncherInterrupts();
 
 		/*
-		 * a worker finished, or postmaster signalled failure to start a
+		 * a worker finished, or postmaster signaled failure to start a
 		 * worker
 		 */
 		if (got_SIGUSR2)

src/backend/postmaster/checkpointer.c

@@ -819,7 +819,7 @@ ReqCheckpointHandler(SIGNAL_ARGS)
 	int			save_errno = errno;
 
 	/*
-	 * The signalling process should have set ckpt_flags nonzero, so all we
+	 * The signaling process should have set ckpt_flags nonzero, so all we
 	 * need do is ensure that our main loop gets kicked out of any wait.
 	 */
 	SetLatch(MyLatch);

src/backend/postmaster/pgstat.c

@@ -6251,7 +6251,7 @@ pgstat_recv_resetslrucounter(PgStat_MsgResetslrucounter *msg, int len)
 /* ----------
  * pgstat_recv_autovac() -
  *
- *	Process an autovacuum signalling message.
+ *	Process an autovacuum signaling message.
  * ----------
  */
 static void

src/backend/postmaster/postmaster.c

@@ -357,7 +357,7 @@ bool		redirection_done = false;	/* stderr redirected for syslogger? */
 /* received START_AUTOVAC_LAUNCHER signal */
 static volatile sig_atomic_t start_autovac_launcher = false;
 
-/* the launcher needs to be signalled to communicate some condition */
+/* the launcher needs to be signaled to communicate some condition */
 static volatile bool avlauncher_needs_signal = false;
 
 /* received START_WALRECEIVER signal */
@@ -3481,7 +3481,7 @@ HandleChildCrash(int pid, int exitstatus, const char *procname)
 	 * We only log messages and send signals if this is the first process
 	 * crash and we're not doing an immediate shutdown; otherwise, we're only
 	 * here to update postmaster's idea of live processes.  If we have already
-	 * signalled children, nonzero exit status is to be expected, so don't
+	 * signaled children, nonzero exit status is to be expected, so don't
 	 * clutter log.
 	 */
 	take_action = !FatalError && Shutdown != ImmediateShutdown;
@@ -5615,7 +5615,7 @@ StartAutovacuumWorker(void)
 	 * might not even be connected to shared memory, so don't try to call
 	 * AutoVacWorkerFailed.)  Note that we also need to signal it so that it
 	 * responds to the condition, but we don't do that here, instead waiting
-	 * for ServerLoop to do it.  This way we avoid a ping-pong signalling in
+	 * for ServerLoop to do it.  This way we avoid a ping-pong signaling in
 	 * quick succession between the autovac launcher and postmaster in case
 	 * things get ugly.
 	 */

src/backend/replication/logical/origin.c

@@ -122,7 +122,7 @@ typedef struct ReplicationState
 	int			acquired_by;
 
 	/*
-	 * Condition variable that's signalled when acquired_by changes.
+	 * Condition variable that's signaled when acquired_by changes.
 	 */
 	ConditionVariable origin_cv;
 

src/backend/replication/logical/reorderbuffer.c

@@ -14,7 +14,7 @@
  *	  This module gets handed individual pieces of transactions in the order
  *	  they are written to the WAL and is responsible to reassemble them into
  *	  toplevel transaction sized pieces. When a transaction is completely
- *	  reassembled - signalled by reading the transaction commit record - it
+ *	  reassembled - signaled by reading the transaction commit record - it
  *	  will then call the output plugin (cf. ReorderBufferCommit()) with the
  *	  individual changes. The output plugins rely on snapshots built by
  *	  snapbuild.c which hands them to us.

src/backend/storage/ipc/latch.c

@@ -1354,7 +1354,7 @@ WaitEventSetWaitBlock(WaitEventSet *set, int cur_timeout,
 			 * because we don't expect the pipe to become readable or to have
 			 * any errors either, treat those cases as postmaster death, too.
 			 *
-			 * Be paranoid about a spurious event signalling the postmaster as
+			 * Be paranoid about a spurious event signaling the postmaster as
 			 * being dead.  There have been reports about that happening with
 			 * older primitives (select(2) to be specific), and a spurious
 			 * WL_POSTMASTER_DEATH event would be painful. Re-checking doesn't
@@ -1613,7 +1613,7 @@ WaitEventSetWaitBlock(WaitEventSet *set, int cur_timeout,
 			 * we don't expect the pipe to become readable or to have any
 			 * errors either, treat those cases as postmaster death, too.
 			 *
-			 * Be paranoid about a spurious event signalling the postmaster as
+			 * Be paranoid about a spurious event signaling the postmaster as
 			 * being dead.  There have been reports about that happening with
 			 * older primitives (select(2) to be specific), and a spurious
 			 * WL_POSTMASTER_DEATH event would be painful. Re-checking doesn't

src/backend/storage/ipc/procsignal.c

@@ -1,7 +1,7 @@
 /*-------------------------------------------------------------------------
  *
  * procsignal.c
- *	  Routines for interprocess signalling
+ *	  Routines for interprocess signaling
  *
  *
  * Portions Copyright (c) 1996-2020, PostgreSQL Global Development Group
@@ -30,7 +30,7 @@
 #include "tcop/tcopprot.h"
 
 /*
- * The SIGUSR1 signal is multiplexed to support signalling multiple event
+ * The SIGUSR1 signal is multiplexed to support signaling multiple event
  * types. The specific reason is communicated via flags in shared memory.
  * We keep a boolean flag for each possible "reason", so that different
  * reasons can be signaled to a process concurrently.  (However, if the same
@@ -40,8 +40,8 @@
  * Each process that wants to receive signals registers its process ID
  * in the ProcSignalSlots array. The array is indexed by backend ID to make
  * slot allocation simple, and to avoid having to search the array when you
- * know the backend ID of the process you're signalling.  (We do support
- * signalling without backend ID, but it's a bit less efficient.)
+ * know the backend ID of the process you're signaling.  (We do support
+ * signaling without backend ID, but it's a bit less efficient.)
  *
  * The flags are actually declared as "volatile sig_atomic_t" for maximum
  * portability.  This should ensure that loads and stores of the flag
@@ -420,7 +420,7 @@ WaitForProcSignalBarrier(uint64 generation)
 /*
  * Perform global barrier related interrupt checking.
  *
- * Any backend that participates in ProcSignal signalling must arrange to
+ * Any backend that participates in ProcSignal signaling must arrange to
  * call this function periodically. It is called from CHECK_FOR_INTERRUPTS(),
  * which is enough for normal backends, but not necessarily for all types of
  * background processes.

src/backend/storage/ipc/shm_mq.c

@@ -1182,7 +1182,7 @@ shm_mq_wait_internal(shm_mq *mq, PGPROC **ptr, BackgroundWorkerHandle *handle)
 			}
 		}
 
-		/* Wait to be signalled. */
+		/* Wait to be signaled. */
 		(void) WaitLatch(MyLatch, WL_LATCH_SET | WL_EXIT_ON_PM_DEATH, 0,
 						 WAIT_EVENT_MQ_INTERNAL);
 

src/backend/storage/ipc/signalfuncs.c

@@ -1,7 +1,7 @@
 /*-------------------------------------------------------------------------
  *
  * signalfuncs.c
- *	  Functions for signalling backends
+ *	  Functions for signaling backends
  *
  * Portions Copyright (c) 1996-2020, PostgreSQL Global Development Group
  * Portions Copyright (c) 1994, Regents of the University of California

src/backend/storage/ipc/standby.c

@@ -92,7 +92,7 @@ InitRecoveryTransactionEnvironment(void)
 	/*
 	 * Initialize shared invalidation management for Startup process, being
 	 * careful to register ourselves as a sendOnly process so we don't need to
-	 * read messages, nor will we get signalled when the queue starts filling
+	 * read messages, nor will we get signaled when the queue starts filling
 	 * up.
 	 */
 	SharedInvalBackendInit(true);

src/backend/storage/lmgr/lock.c

@@ -759,7 +759,7 @@ LockAcquire(const LOCKTAG *locktag,
  * reportMemoryError specifies whether a lock request that fills the lock
  * table should generate an ERROR or not.  Passing "false" allows the caller
  * to attempt to recover from lock-table-full situations, perhaps by forcibly
- * cancelling other lock holders and then retrying.  Note, however, that the
+ * canceling other lock holders and then retrying.  Note, however, that the
  * return code for that is LOCKACQUIRE_NOT_AVAIL, so that it's unsafe to use
  * in combination with dontWait = true, as the cause of failure couldn't be
  * distinguished.

src/backend/tcop/postgres.c

@@ -2750,7 +2750,7 @@ drop_unnamed_stmt(void)
  */
 
 /*
- * quickdie() occurs when signalled SIGQUIT by the postmaster.
+ * quickdie() occurs when signaled SIGQUIT by the postmaster.
  *
  * Some backend has bought the farm,
  * so we need to stop what we're doing and exit.

src/backend/utils/cache/relfilenodemap.c

@@ -64,7 +64,7 @@ RelfilenodeMapInvalidateCallback(Datum arg, Oid relid)
 	while ((entry = (RelfilenodeMapEntry *) hash_seq_search(&status)) != NULL)
 	{
 		/*
-		 * If relid is InvalidOid, signalling a complete reset, we must remove
+		 * If relid is InvalidOid, signaling a complete reset, we must remove
 		 * all entries, otherwise just remove the specific relation's entry.
 		 * Always remove negative cache entries.
 		 */