unimore/kernel-hacking-2024-linux-steffo
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mm/slab_common: move generic bulk alloc/free functions to SLOB

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Now that only SLOB use __kmem_cache_{alloc,free}_bulk(), move them to
SLOB. No functional change intended.

Signed-off-by: Hyeonggon Yoo <42.hyeyoo@gmail.com>
Signed-off-by: Vlastimil Babka <vbabka@suse.cz>
This commit is contained in:
Hyeonggon Yoo 2022-06-15 00:26:35 +09:00 committed by Vlastimil Babka
parent 2055e67bb6
commit 3041808b52
3 changed files with 21 additions and 40 deletions
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9
mm/slab.h
View file

@ -380,15 +380,6 @@ void slabinfo_show_stats(struct seq_file *m, struct kmem_cache *s);
ssize_t slabinfo_write(struct file *file, const char __user *buffer,
size_t count, loff_t *ppos);
/*
* Generic implementation of bulk operations
* These are useful for situations in which the allocator cannot
* perform optimizations. In that case segments of the object listed
* may be allocated or freed using these operations.
*/
void __kmem_cache_free_bulk(struct kmem_cache *, size_t, void **);
int __kmem_cache_alloc_bulk(struct kmem_cache *, gfp_t, size_t, void **);
static inline enum node_stat_item cache_vmstat_idx(struct kmem_cache *s)
{
return (s->flags & SLAB_RECLAIM_ACCOUNT) ?

27
mm/slab_common.c
View file

@ -104,33 +104,6 @@ static inline int kmem_cache_sanity_check(const char *name, unsigned int size)
}
#endif
void __kmem_cache_free_bulk(struct kmem_cache *s, size_t nr, void **p)
{
size_t i;
for (i = 0; i < nr; i++) {
if (s)
kmem_cache_free(s, p[i]);
else
kfree(p[i]);
}
}
int __kmem_cache_alloc_bulk(struct kmem_cache *s, gfp_t flags, size_t nr,
void **p)
{
size_t i;
for (i = 0; i < nr; i++) {
void *x = p[i] = kmem_cache_alloc(s, flags);
if (!x) {
__kmem_cache_free_bulk(s, i, p);
return 0;
}
}
return i;
}
/*
* Figure out what the alignment of the objects will be given a set of
* flags, a user specified alignment and the size of the objects.

25
mm/slob.c
View file

@ -692,16 +692,33 @@ void kmem_cache_free(struct kmem_cache *c, void *b)
}
EXPORT_SYMBOL(kmem_cache_free);
void kmem_cache_free_bulk(struct kmem_cache *s, size_t size, void **p)
void kmem_cache_free_bulk(struct kmem_cache *s, size_t nr, void **p)
{
__kmem_cache_free_bulk(s, size, p);
size_t i;
for (i = 0; i < nr; i++) {
if (s)
kmem_cache_free(s, p[i]);
else
kfree(p[i]);
}
}
EXPORT_SYMBOL(kmem_cache_free_bulk);
int kmem_cache_alloc_bulk(struct kmem_cache *s, gfp_t flags, size_t size,
int kmem_cache_alloc_bulk(struct kmem_cache *s, gfp_t flags, size_t nr,
void **p)
{
return __kmem_cache_alloc_bulk(s, flags, size, p);
size_t i;
for (i = 0; i < nr; i++) {
void *x = p[i] = kmem_cache_alloc(s, flags);
if (!x) {
kmem_cache_free_bulk(s, i, p);
return 0;
}
}
return i;
}
EXPORT_SYMBOL(kmem_cache_alloc_bulk);