mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-11-24 04:34:08 +08:00
7e736b8e36
Patch series "add common struct mm_slot and use it in THP and KSM", v2. At present, both THP and KSM module have similar structures mm_slot for organizing and recording the information required for scanning mm, and each defines the following exactly the same operation functions: - alloc_mm_slot - free_mm_slot - get_mm_slot - insert_to_mm_slots_hash In order to de-duplicate these codes, this patchset introduces a common struct mm_slot, and lets THP and KSM to use it. This patch (of 7): At present, both THP and KSM module have similar structures mm_slot for organizing and recording the information required for scanning mm, and each defines the following exactly the same operation functions: - alloc_mm_slot - free_mm_slot - get_mm_slot - insert_to_mm_slots_hash In order to de-duplicate these codes, this patch introduces a common struct mm_slot, and subsequent patches will let THP and KSM to use it. Link: https://lkml.kernel.org/r/20220831031951.43152-1-zhengqi.arch@bytedance.com Link: https://lkml.kernel.org/r/20220831031951.43152-2-zhengqi.arch@bytedance.com Signed-off-by: Qi Zheng <zhengqi.arch@bytedance.com> Cc: Johannes Weiner <hannes@cmpxchg.org> Cc: Matthew Wilcox <willy@infradead.org> Cc: Mike Rapoport <rppt@kernel.org> Cc: Minchan Kim <minchan@kernel.org> Cc: Vlastimil Babka <vbabka@suse.cz> Cc: Yang Shi <shy828301@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
56 lines
1.4 KiB
C
56 lines
1.4 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
|
|
#ifndef _LINUX_MM_SLOT_H
|
|
#define _LINUX_MM_SLOT_H
|
|
|
|
#include <linux/hashtable.h>
|
|
#include <linux/slab.h>
|
|
|
|
/*
|
|
* struct mm_slot - hash lookup from mm to mm_slot
|
|
* @hash: link to the mm_slots hash list
|
|
* @mm_node: link into the mm_slots list
|
|
* @mm: the mm that this information is valid for
|
|
*/
|
|
struct mm_slot {
|
|
struct hlist_node hash;
|
|
struct list_head mm_node;
|
|
struct mm_struct *mm;
|
|
};
|
|
|
|
#define mm_slot_entry(ptr, type, member) \
|
|
container_of(ptr, type, member)
|
|
|
|
static inline void *mm_slot_alloc(struct kmem_cache *cache)
|
|
{
|
|
if (!cache) /* initialization failed */
|
|
return NULL;
|
|
return kmem_cache_zalloc(cache, GFP_KERNEL);
|
|
}
|
|
|
|
static inline void mm_slot_free(struct kmem_cache *cache, void *objp)
|
|
{
|
|
kmem_cache_free(cache, objp);
|
|
}
|
|
|
|
#define mm_slot_lookup(_hashtable, _mm) \
|
|
({ \
|
|
struct mm_slot *tmp_slot, *mm_slot = NULL; \
|
|
\
|
|
hash_for_each_possible(_hashtable, tmp_slot, hash, (unsigned long)_mm) \
|
|
if (_mm == tmp_slot->mm) { \
|
|
mm_slot = tmp_slot; \
|
|
break; \
|
|
} \
|
|
\
|
|
mm_slot; \
|
|
})
|
|
|
|
#define mm_slot_insert(_hashtable, _mm, _mm_slot) \
|
|
({ \
|
|
_mm_slot->mm = _mm; \
|
|
hash_add(_hashtable, &_mm_slot->hash, (unsigned long)_mm); \
|
|
})
|
|
|
|
#endif /* _LINUX_MM_SLOT_H */
|