linux-kernel - [053/205] drm/i915: fix hibernation since i915 self-reclaim fixes

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Date:	Fri, 30 Jul 2010 10:51:10 -0700
From:	Greg KH <gregkh@...e.de>
To:	linux-kernel@...r.kernel.org, stable@...nel.org
Cc:	stable-review@...nel.org, torvalds@...ux-foundation.org,
	akpm@...ux-foundation.org, alan@...rguk.ukuu.org.uk,
	Dave Airlie <airlied@...hat.com>,
	Chris Wilson <chris@...is-wilson.co.uk>,
	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>,
	Hugh Dickins <hugh.dickins@...cali.co.uk>
Subject: [053/205] drm/i915: fix hibernation since i915 self-reclaim fixes

2.6.34-stable review patch.  If anyone has any objections, please let us know.

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

From: Linus Torvalds <torvalds@...ux-foundation.org>

commit 985b823b919273fe1327d56d2196b4f92e5d0fae upstream.

Since commit 4bdadb9785696439c6e2b3efe34aa76df1149c83 ("drm/i915:
Selectively enable self-reclaim"), we've been passing GFP_MOVABLE to the
i915 page allocator where we weren't before due to some over-eager
removal of the page mapping gfp_flags games the code used to play.

This caused hibernate on Intel hardware to result in a lot of memory
corruptions on resume.  See for example

  http://bugzilla.kernel.org/show_bug.cgi?id=13811

Reported-by: Evengi Golov (in bugzilla)
Signed-off-by: Dave Airlie <airlied@...hat.com>
Tested-by: M. Vefa Bicakci <bicave@...eronline.com>
Cc: Chris Wilson <chris@...is-wilson.co.uk>
Cc: KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>
Cc: Hugh Dickins <hugh.dickins@...cali.co.uk>
Signed-off-by: Linus Torvalds <torvalds@...ux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@...e.de>

---
 drivers/gpu/drm/i915/i915_gem.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/gpu/drm/i915/i915_gem.c
+++ b/drivers/gpu/drm/i915/i915_gem.c
@@ -2312,7 +2312,7 @@ i915_gem_object_get_pages(struct drm_gem
 	mapping = inode->i_mapping;
 	for (i = 0; i < page_count; i++) {
 		page = read_cache_page_gfp(mapping, i,
-					   mapping_gfp_mask (mapping) |
+					   GFP_HIGHUSER |
 					   __GFP_COLD |
 					   gfpmask);
 		if (IS_ERR(page))

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