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[PATCH 3/4] kern: explain the significance of the chosen length
From: |
Justus Winter |
Subject: |
[PATCH 3/4] kern: explain the significance of the chosen length |
Date: |
Mon, 6 Jan 2014 00:34:54 +0100 |
* kern/slab.h (KMEM_CACHE_NAME_SIZE): Explain the significance of the
chosen length.
---
kern/slab.h | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/kern/slab.h b/kern/slab.h
index a4219c4..fd65893 100644
--- a/kern/slab.h
+++ b/kern/slab.h
@@ -147,7 +147,9 @@ typedef vm_offset_t (*kmem_slab_alloc_fn_t)(vm_size_t);
typedef void (*kmem_slab_free_fn_t)(vm_offset_t, vm_size_t);
/*
- * Cache name buffer size.
+ * Cache name buffer size. The size is chosen so that struct
+ * kmem_cache fits into two cache lines. The size of a cache line on
+ * a typical CPU is 64 bytes.
*/
#define KMEM_CACHE_NAME_SIZE 24
--
1.8.5.2
Re: [PATCH 1/4] linux: fix bit tests, Samuel Thibault, 2014/01/05