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mm, slab: deprecate SLAB_MEM_SPREAD flag

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The SLAB_MEM_SPREAD flag used to be implemented in SLAB, which was
removed.  SLUB instead relies on the page allocator's NUMA policies.
Change the flag's value to 0 to free up the value it had, and mark it
for full removal once all users are gone.

Reported-by: Steven Rostedt <rostedt@goodmis.org>
Closes: https://lore.kernel.org/all/20240131172027.10f64405@gandalf.local.home/
Reviewed-and-tested-by: Xiongwei Song <xiongwei.song@windriver.com>
Reviewed-by: Chengming Zhou <chengming.zhou@linux.dev>
Reviewed-by: Roman Gushchin <roman.gushchin@linux.dev>
Acked-by: David Rientjes <rientjes@google.com>
Signed-off-by: Vlastimil Babka <vbabka@suse.cz>
This commit is contained in:
Vlastimil Babka 2024-02-23 19:27:17 +01:00
parent 6613476e22
commit cdeeaaba17
2 changed files with 3 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
include/linux/slab.h
View File

@ -96,8 +96,6 @@
*/
/* Defer freeing slabs to RCU */
#define SLAB_TYPESAFE_BY_RCU ((slab_flags_t __force)0x00080000U)
/* Spread some memory over cpuset */
#define SLAB_MEM_SPREAD ((slab_flags_t __force)0x00100000U)
/* Trace allocations and frees */
#define SLAB_TRACE ((slab_flags_t __force)0x00200000U)
@ -164,6 +162,9 @@
#endif
#define SLAB_TEMPORARY SLAB_RECLAIM_ACCOUNT /* Objects are short-lived */
/* Obsolete unused flag, to be removed */
#define SLAB_MEM_SPREAD ((slab_flags_t __force)0U)
/*
* ZERO_SIZE_PTR will be returned for zero sized kmalloc requests.
*

1
mm/slab.h
View File

@ -469,7 +469,6 @@ static inline bool is_kmalloc_cache(struct kmem_cache *s)
SLAB_STORE_USER | \
SLAB_TRACE | \
SLAB_CONSISTENCY_CHECKS | \
SLAB_MEM_SPREAD | \
SLAB_NOLEAKTRACE | \
SLAB_RECLAIM_ACCOUNT | \
SLAB_TEMPORARY | \