[ 069/150] drm/udl: disable fb_defio by default

Greg Kroah-Hartman
2013-02-26T23:57:54Z

From: Dave Airlie <airlied@redhat.com>

commit 677d23b70bf949f75746c80cbae92c233c6b5e2a upstream.

There seems to be a bad interaction between gem/shmem and defio on top,
I get list corruption on the page lru in the shmem code.

Turn it off for now until we get some more digging done.

Signed-off-by: Dave Airlie <airlied@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
drivers/gpu/drm/udl/udl_fb.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)

--- a/drivers/gpu/drm/udl/udl_fb.c
+++ b/drivers/gpu/drm/udl/udl_fb.c
@@ -22,9 +22,9 @@

#include <drm/drm_fb_helper.h>

-#define DL_DEFIO_WRITE_DELAY 5 /* fb_deferred_io.delay in jiffies */
+#define DL_DEFIO_WRITE_DELAY (HZ/20) /* fb_deferred_io.delay in jiffies */

-static int fb_defio = 1; /* Optionally enable experimental fb_defio mmap support */
+static int fb_defio = 0; /* Optionally enable experimental fb_defio mmap support */
static int fb_bpp = 16;

module_param(fb_bpp, int, S_IWUSR | S_IRUSR | S_IWGRP | S_IRGRP);