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mm/zswap: remove zswap_entry_cache_{create,destroy} helper function

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Patch series "Delay the initialization of zswap", v9.

In the initialization of zswap, about 18MB memory will be allocated for
zswap_pool.  Since some users may not use zswap, the zswap_pool is wasted.
Save memory by delaying the initialization of zswap until enabled.


This patch (of 3):

Remove zswap_entry_cache_create and zswap_entry_cache_destroy and use
kmem_cache_* function directly.

Link: https://lkml.kernel.org/r/20230411093632.822290-1-liushixin2@huawei.com
Link: https://lkml.kernel.org/r/20230403121318.1876082-1-liushixin2@huawei.com
Link: https://lkml.kernel.org/r/20230403121318.1876082-2-liushixin2@huawei.com
Signed-off-by: Liu Shixin <liushixin2@huawei.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Cc: Dan Streetman <ddstreet@ieee.org>
Cc: Nathan Chancellor <nathan@kernel.org>
Cc: Seth Jennings <sjenning@redhat.com>
Cc: Vitaly Wool <vitaly.wool@konsulko.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Liu Shixin 2023-04-03 20:13:16 +08:00 committed by Andrew Morton
parent fa1c77c13c
commit b791912252
1 changed files with 3 additions and 13 deletions
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16
mm/zswap.c
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@ -272,17 +272,6 @@ static void zswap_update_total_size(void)
**********************************/ **********************************/
static struct kmem_cache *zswap_entry_cache; static struct kmem_cache *zswap_entry_cache;
static int __init zswap_entry_cache_create(void)
{
zswap_entry_cache = KMEM_CACHE(zswap_entry, 0);
return zswap_entry_cache == NULL;
}
static void __init zswap_entry_cache_destroy(void)
{
kmem_cache_destroy(zswap_entry_cache);
}
static struct zswap_entry *zswap_entry_cache_alloc(gfp_t gfp) static struct zswap_entry *zswap_entry_cache_alloc(gfp_t gfp)
{ {
struct zswap_entry *entry; struct zswap_entry *entry;
@ -1489,7 +1478,8 @@ static int __init init_zswap(void)
zswap_init_started = true; zswap_init_started = true;
if (zswap_entry_cache_create()) { zswap_entry_cache = KMEM_CACHE(zswap_entry, 0);
if (!zswap_entry_cache) {
pr_err("entry cache creation failed\n"); pr_err("entry cache creation failed\n");
goto cache_fail; goto cache_fail;
} }
@ -1538,7 +1528,7 @@ fallback_fail:
hp_fail: hp_fail:
cpuhp_remove_state(CPUHP_MM_ZSWP_MEM_PREPARE); cpuhp_remove_state(CPUHP_MM_ZSWP_MEM_PREPARE);
dstmem_fail: dstmem_fail:
zswap_entry_cache_destroy(); kmem_cache_destroy(zswap_entry_cache);
cache_fail: cache_fail:
/* if built-in, we aren't unloaded on failure; don't allow use */ /* if built-in, we aren't unloaded on failure; don't allow use */
zswap_init_failed = true; zswap_init_failed = true;