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From: Qian Cai <>
Cc:,, Qian Cai <>
Subject: [PATCH -mmotm] mm: fix SHUFFLE_PAGE_ALLOCATOR help texts
Date: Thu, 25 Apr 2019 16:13:00 -0400
Message-ID: <> (raw)

The help texts for SHUFFLE_PAGE_ALLOCATOR makes a wrong assumption that
a page size is 4KB everywhere.

Signed-off-by: Qian Cai <>

Fix mm-shuffle-initial-free-memory-to-improve-memory-side-cache-utilization.patch.

 init/Kconfig | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/init/Kconfig b/init/Kconfig
index b050890f69dc..d96a910369c7 100644
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -1764,8 +1764,9 @@ config SHUFFLE_PAGE_ALLOCATOR
 	  the presence of a memory-side-cache. There are also incidental
 	  security benefits as it reduces the predictability of page
 	  allocations to compliment SLAB_FREELIST_RANDOM, but the
-	  default granularity of shuffling on 4MB (MAX_ORDER) pages is
-	  selected based on cache utilization benefits.
+	  default granularity of shuffling on the "MAX_ORDER - 1" i.e,
+	  10th order of pages is selected based on cache utilization
+	  benefits on x86.
 	  While the randomization improves cache utilization it may
 	  negatively impact workloads on platforms without a cache. For
2.20.1 (Apple Git-117)

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Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-04-25 20:13 Qian Cai [this message]
2019-04-25 20:36 ` Dan Williams

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