From: Jens Axboe <jaxboe@fusionio.com>
Date: Sat, 22 Jan 2011 22:11:13 +0000 (-0700)
Subject: mmap: catch invalid msync() errors early
X-Git-Tag: fio-1.50~4
X-Git-Url: https://git.kernel.dk/?p=fio.git;a=commitdiff_plain;h=913ea0db12596b735a030a1836bd913497b7120a;ds=inline

mmap: catch invalid msync() errors early

Reported-by: Bruce Cran <bruce@cran.org.uk>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
---

diff --git a/engines/mmap.c b/engines/mmap.c
index 059bfcfa..79238b1e 100644
--- a/engines/mmap.c
+++ b/engines/mmap.c
@@ -181,8 +181,16 @@ static int fio_mmapio_queue(struct thread_data *td, struct io_u *io_u)
 
 static int fio_mmapio_init(struct thread_data *td)
 {
+	struct thread_options *o = &td->o;
 	unsigned long shift, mask;
 
+	if ((td->o.rw_min_bs & page_mask) &&
+	    (o->odirect || o->fsync_blocks || o->fdatasync_blocks)) {
+		log_err("fio: mmap options dictate a minimum block size of "
+			"%lu bytes\n", page_size);
+		return 1;
+	}
+
 	mmap_map_size = MMAP_TOTAL_SZ / td->o.nr_files;
 	mask = mmap_map_size;
 	shift = 0;