X-Git-Url: https://git.kernel.dk/?a=blobdiff_plain;f=memory.c;h=8d6f95579a3366cb633226237965c5de971243e4;hb=a05bd42ddbe73c726d062829c3295e7e315ee653;hp=384b80617f609ca65c6f099b1c073de4c78cc20c;hpb=9b33b4794b621b28347e8ca8fb425b918052434c;p=fio.git

diff --git a/memory.c b/memory.c
index 384b8061..8d6f9557 100644
--- a/memory.c
+++ b/memory.c
@@ -70,6 +70,11 @@ int allocate_io_mem(struct thread_data *td)
 		td->shm_id = shmget(IPC_PRIVATE, td->orig_buffer_size, flags);
 		if (td->shm_id < 0) {
 			td_verror(td, errno, "shmget");
+			if (geteuid() != 0 && errno == ENOMEM)
+				log_err("fio: you may need to run this job as root\n");
+			if (errno == EINVAL && td->o.mem_type == MEM_SHMHUGE)
+				log_err("fio: check that you have free huge pages and that hugepage-size is correct.\n");
+			
 			return 1;
 		}
 
@@ -93,6 +98,11 @@ int allocate_io_mem(struct thread_data *td)
 				td->orig_buffer = NULL;
 				return 1;
 			}
+			if (ftruncate(td->mmapfd, td->orig_buffer_size) < 0) {
+				td_verror(td, errno, "truncate mmap file");
+				td->orig_buffer = NULL;
+				return 1;
+			}
 		} else
 			flags |= OS_MAP_ANON;