This is a note to let you know that I've just added the patch titled
drm/udl: disable fb_defio by default
to the 3.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
drm-udl-disable-fb_defio-by-default.patch
and it can be found in the queue-3.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <[email protected]> know about it.
>From 677d23b70bf949f75746c80cbae92c233c6b5e2a Mon Sep 17 00:00:00 2001
From: Dave Airlie <[email protected]>
Date: Thu, 7 Feb 2013 12:30:25 +1000
Subject: drm/udl: disable fb_defio by default
From: Dave Airlie <[email protected]>
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 <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
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_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);
Patches currently in stable-queue which might be from [email protected] are
queue-3.4/drm-udl-disable-fb_defio-by-default.patch
queue-3.4/drm-udl-make-usage-as-a-console-safer.patch
queue-3.4/vgacon-vt-clear-buffer-attributes-when-we-load-a-512-character-font-v2.patch
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