The patch titled
memory page_alloc zonelist caching speedup aligncache
has been added to the -mm tree. Its filename is
memory-page_alloc-zonelist-caching-speedup-speedup.patch
See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find
out what to do about this
------------------------------------------------------
Subject: memory page_alloc zonelist caching speedup aligncache
From: Paul Jackson <pj@xxxxxxx>
Avoid frequent writes to the zonelist zones[] array, which are read-only
after initial setup, by putting the zonelist_cache on a separate cacheline.
Signed-off-by: Paul Jackson <pj@xxxxxxx>
Cc: Rohit Seth <rohitseth@xxxxxxxxxx>
Cc: Christoph Lameter <clameter@xxxxxxxxxxxx>
Cc: David Rientjes <rientjes@xxxxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxx>
---
include/linux/mmzone.h | 3 ++-
1 files changed, 2 insertions(+), 1 deletion(-)
diff -puN include/linux/mmzone.h~memory-page_alloc-zonelist-caching-speedup-speedup include/linux/mmzone.h
--- a/include/linux/mmzone.h~memory-page_alloc-zonelist-caching-speedup-speedup
+++ a/include/linux/mmzone.h
@@ -396,7 +396,8 @@ struct zonelist {
struct zonelist_cache *zlcache_ptr; // NULL or &zlcache
struct zone *zones[MAX_ZONES_PER_ZONELIST + 1]; // NULL delimited
#ifdef CONFIG_NUMA
- struct zonelist_cache zlcache; // optional ...
+ /* Keep written zonelist_cache off read-only zones[] cache lines */
+ struct zonelist_cache zlcache ____cacheline_aligned; // optional ...
#endif
};
_
Patches currently in -mm which might be from pj@xxxxxxx are
lib-cpumaskc-should-include-nodemaskh.patch
memory-page-alloc-minor-cleanups.patch
memory-page-alloc-minor-cleanups-fix.patch
memory-page_alloc-zonelist-caching-speedup.patch
memory-page_alloc-zonelist-caching-speedup-speedup.patch
-
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