Detect and print when the OS doesn't support huge pages

Signed-off-by: Jens Axboe <jens.axboe@oracle.com>

diff --git a/memory.c b/memory.c
index d075c3526e6947483eee23dd006aeeebe5830f02..a95edd780bafdf2a97f44cc927034aa068581a26 100644 (file)
--- a/memory.c
+++ b/memory.c
@@ -65,8 +65,12 @@ static int alloc_mem_shm(struct thread_data *td)
                td_verror(td, errno, "shmget");
                if (geteuid() != 0 && errno == ENOMEM)
                        log_err("fio: you may need to run this job as root\n");
                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");
+               if (td->o.mem_type == MEM_SHMHUM) {
+                       if (errno == EINVAL)
+                               log_err("fio: check that you have free huge pages and that hugepage-size is correct.\n");
+                       else if (errno == ENOSYS)
+                               log_err("fio: your system does not appear to support huge pages.\n");
+               }

                
                return 1;
        }
                
                return 1;
        }