[RFC,v2,7/7] tools: Add SLUB percpu array functions for testing

Commit Message

Vlastimil Babka Aug. 10, 2023, 4:36 p.m. UTC

From: "Liam R. Howlett" <[e-mail]>

Support new percpu array functions to the test code so they can be used
in the maple tree testing.

Signed-off-by: Liam R. Howlett <[e-mail]>
Signed-off-by: Vlastimil Babka <[e-mail]>
---
 tools/include/linux/slab.h              |  4 ++++
 tools/testing/radix-tree/linux.c        | 14 ++++++++++++++
 tools/testing/radix-tree/linux/kernel.h |  1 +
 3 files changed, 19 insertions(+)

Patch

diff --git a/tools/include/linux/slab.h b/tools/include/linux/slab.h
index 311759ea25e9..1043f9c5ef4e 100644
--- a/tools/include/linux/slab.h
+++ b/tools/include/linux/slab.h
@@ -7,6 +7,7 @@ 
 
 #define SLAB_PANIC 2
 #define SLAB_RECLAIM_ACCOUNT    0x00020000UL            /* Objects are reclaimable */
+#define SLAB_NO_MERGE		0x01000000UL		/* Prevent merging with compatible kmem caches */
 
 #define kzalloc_node(size, flags, node) kmalloc(size, flags)
 
@@ -45,4 +46,7 @@  void kmem_cache_free_bulk(struct kmem_cache *cachep, size_t size, void **list);
 int kmem_cache_alloc_bulk(struct kmem_cache *cachep, gfp_t gfp, size_t size,
 			  void **list);
 
+int kmem_cache_setup_percpu_array(struct kmem_cache *s, unsigned int count);
+int kmem_cache_prefill_percpu_array(struct kmem_cache *s, unsigned int count,
+		gfp_t gfp);
 #endif		/* _TOOLS_SLAB_H */
diff --git a/tools/testing/radix-tree/linux.c b/tools/testing/radix-tree/linux.c
index d587a558997f..cbe7937fdd5e 100644
--- a/tools/testing/radix-tree/linux.c
+++ b/tools/testing/radix-tree/linux.c
@@ -187,6 +187,20 @@  int kmem_cache_alloc_bulk(struct kmem_cache *cachep, gfp_t gfp, size_t size,
 	return size;
 }
 
+int kmem_cache_setup_percpu_array(struct kmem_cache *s, unsigned int count)
+{
+	return 0;
+}
+
+int kmem_cache_prefill_percpu_array(struct kmem_cache *s, unsigned int count,
+		gfp_t gfp)
+{
+	if (count > s->non_kernel)
+		return s->non_kernel;
+
+	return count;
+}
+
 struct kmem_cache *
 kmem_cache_create(const char *name, unsigned int size, unsigned int align,
 		unsigned int flags, void (*ctor)(void *))
diff --git a/tools/testing/radix-tree/linux/kernel.h b/tools/testing/radix-tree/linux/kernel.h
index c5c9d05f29da..fc75018974de 100644
--- a/tools/testing/radix-tree/linux/kernel.h
+++ b/tools/testing/radix-tree/linux/kernel.h
@@ -15,6 +15,7 @@ 
 
 #define printk printf
 #define pr_err printk
+#define pr_warn printk
 #define pr_info printk
 #define pr_debug printk
 #define pr_cont printk