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From: Richard Kennedy <richard@rsk.demon.co.uk>
To: David Airlie <airlied@linux.ie>
Cc: lkml <linux-kernel@vger.kernel.org>, dri-devel@lists.freedesktop.org
Subject: [PATCH] drm: reorder drm_open_hash to remove padding on 64 bit builds
Date: Tue, 01 Mar 2011 14:09:16 +0000	[thread overview]
Message-ID: <1298988556.2030.4.camel@castor.rsk> (raw)

Remove 8 bytes of padding on 64 bit builds to reduce the size of
drm_open_hash to 24 bytes, which also shrinks drm_object_file by 24
bytes (136 -> 112) allowing it to fit in one fewer cache lines and a
smaller slab.

Signed-off-by: Richard Kennedy <richard@rsk.demon.co.uk>
---
patch against v2.6.38-rc6
compiled & tested on x86_64 with nouveau.

regards
Richard



diff --git a/include/drm/drm_hashtab.h b/include/drm/drm_hashtab.h
index 0af087a..ff2ab48 100644
--- a/include/drm/drm_hashtab.h
+++ b/include/drm/drm_hashtab.h
@@ -48,8 +48,8 @@ struct drm_open_hash {
 	unsigned int size;
 	unsigned int order;
 	unsigned int fill;
-	struct hlist_head *table;
 	int use_vmalloc;
+	struct hlist_head *table;
 };
 
 



                 reply	other threads:[~2011-03-01 14:09 UTC|newest]

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