From: Jens Axboe <jens.axboe@oracle.com>
Date: Mon, 16 Apr 2007 10:56:00 +0000 (+0200)
Subject: Warn more gently if the kernel is too old for io scheduler switching
X-Git-Tag: fio-1.16~21
X-Git-Url: https://git.kernel.dk/?p=fio.git;a=commitdiff_plain;h=cbf5c1d7a2286fa1cf548c0678b3b0bf13bcda7e;hp=13fbfd8d34579ea448db820eb80d12587e094c55

Warn more gently if the kernel is too old for io scheduler switching

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

diff --git a/fio.c b/fio.c
index edc6b495..160d5335 100644
--- a/fio.c
+++ b/fio.c
@@ -662,7 +662,11 @@ static int switch_ioscheduler(struct thread_data *td)
 
 	f = fopen(tmp, "r+");
 	if (!f) {
-		td_verror(td, errno, "fopen");
+		if (errno == ENOENT) {
+			log_err("fio: os or kernel doesn't support IO scheduler switching\n");
+			return 0;
+		}
+		td_verror(td, errno, "fopen iosched");
 		return 1;
 	}