Patchwork [095/139] drm/udl: disable fb_defio by default

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Submitter Luis Henriques
Date Feb. 28, 2013, 2:44 p.m.
Message ID <1362062689-2567-96-git-send-email-luis.henriques@canonical.com>
Download mbox | patch
Permalink /patch/224066/
State New
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Luis Henriques - Feb. 28, 2013, 2:44 p.m.
3.5.7.7 -stable review patch.  If anyone has any objections, please let me know.

------------------

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: Luis Henriques <luis.henriques@canonical.com>
---
 drivers/gpu/drm/udl/udl_fb.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

Patch

diff --git a/drivers/gpu/drm/udl/udl_fb.c b/drivers/gpu/drm/udl/udl_fb.c
index adbf85e..c9df873 100644
--- a/drivers/gpu/drm/udl/udl_fb.c
+++ b/drivers/gpu/drm/udl/udl_fb.c
@@ -22,9 +22,9 @@ 
 
 #include "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);