From: Jens Axboe <jens.axboe@oracle.com>
Date: Wed, 20 May 2009 08:49:44 +0000 (+0200)
Subject: Add appropriate warning in mmap engine for large maps failing
X-Git-Tag: fio-1.26.3~4
X-Git-Url: https://git.kernel.dk/?p=fio.git;a=commitdiff_plain;h=8de43fd22302237a2b35515ff869fde514dfc76d;ds=sidebyside

Add appropriate warning in mmap engine for large maps failing

On 32-bit archs, this can trigger for large files. This should be fixed by
mapping lazily, for now just catch the error.

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

diff --git a/engines/mmap.c b/engines/mmap.c
index dffad90b..5b8d800c 100644
--- a/engines/mmap.c
+++ b/engines/mmap.c
@@ -79,8 +79,12 @@ static int fio_mmapio_open(struct thread_data *td, struct fio_file *f)
 
 	f->mmap = mmap(NULL, f->io_size, flags, MAP_SHARED, f->fd, f->file_offset);
 	if (f->mmap == MAP_FAILED) {
+		int err = errno;
+
 		f->mmap = NULL;
-		td_verror(td, errno, "mmap");
+		td_verror(td, err, "mmap");
+		if (err == EINVAL && f->io_size > 2*1024*1024*1024UL)
+			log_err("fio: mmap size likely too large\n");
 		goto err;
 	}