Fix 'mmap' DSM implementation with allocations larger than 4 GB

hlinnaka · hlinnaka · commit fbf9a7ac4d30 · 2024-02-13T21:23:41.000+02:00
Fixes bug #18341. Backpatch to all supported versions. Discussion: https://www.postgresql.org/message-id/18341-ce16599e7fd6228c@postgresql.org
diff --git a/src/backend/storage/ipc/dsm_impl.c b/src/backend/storage/ipc/dsm_impl.c
@@ -873,7 +873,7 @@ dsm_impl_mmap(dsm_op op, dsm_handle handle, Size request_size,
 		 * transferring data to the kernel.
 		 */
 		char	   *zbuffer = (char *) palloc0(ZBUFFER_SIZE);
-		uint32		remaining = request_size;
+		Size		remaining = request_size;
 		bool		success = true;
 
 		/*
