The patch titled
Subject: zsmalloc: add ops fields to zs_pool to store evict handlers
has been added to the -mm mm-unstable branch. Its filename is
zsmalloc-add-ops-fields-to-zs_pool-to-store-evict-handlers.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/zsmalloc-add-ops-fields-to-zs_pool-to-store-evict-handlers.patch
This patch will later appear in the mm-unstable branch at
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
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------------------------------------------------------
From: Nhat Pham <nphamcs@xxxxxxxxx>
Subject: zsmalloc: add ops fields to zs_pool to store evict handlers
Date: Wed, 26 Oct 2022 13:06:12 -0700
This adds fields to zs_pool to store evict handlers for writeback,
analogous to the zbud allocator.
Link: https://lkml.kernel.org/r/20221026200613.1031261-5-nphamcs@xxxxxxxxx
Signed-off-by: Nhat Pham <nphamcs@xxxxxxxxx>
Acked-by: Johannes Weiner <hannes@xxxxxxxxxxx>
Cc: Dan Streetman <ddstreet@xxxxxxxx>
Cc: Minchan Kim <minchan@xxxxxxxxxx>
Cc: Nitin Gupta <ngupta@xxxxxxxxxx>
Cc: Sergey Senozhatsky <senozhatsky@xxxxxxxxxxxx>
Cc: Seth Jennings <sjenning@xxxxxxxxxx>
Cc: Vitaly Wool <vitaly.wool@xxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
--- a/mm/zsmalloc.c~zsmalloc-add-ops-fields-to-zs_pool-to-store-evict-handlers
+++ a/mm/zsmalloc.c
@@ -213,6 +213,12 @@ struct link_free {
};
};
+struct zs_pool;
+
+struct zs_ops {
+ int (*evict)(struct zs_pool *pool, unsigned long handle);
+};
+
struct zs_pool {
const char *name;
@@ -234,6 +240,12 @@ struct zs_pool {
/* List tracking the zspages in LRU order by most recently added object */
struct list_head lru;
+#ifdef CONFIG_ZPOOL
+ const struct zs_ops *ops;
+ struct zpool *zpool;
+ const struct zpool_ops *zpool_ops;
+#endif
+
#ifdef CONFIG_ZSMALLOC_STAT
struct dentry *stat_dentry;
#endif
@@ -371,6 +383,18 @@ static void record_obj(unsigned long han
#ifdef CONFIG_ZPOOL
+static int zs_zpool_evict(struct zs_pool *pool, unsigned long handle)
+{
+ if (pool->zpool && pool->zpool_ops && pool->zpool_ops->evict)
+ return pool->zpool_ops->evict(pool->zpool, handle);
+ else
+ return -ENOENT;
+}
+
+static const struct zs_ops zs_zpool_ops = {
+ .evict = zs_zpool_evict
+};
+
static void *zs_zpool_create(const char *name, gfp_t gfp,
const struct zpool_ops *zpool_ops,
struct zpool *zpool)
@@ -380,7 +404,18 @@ static void *zs_zpool_create(const char
* different contexts and its caller must provide a valid
* gfp mask.
*/
- return zs_create_pool(name, ZS_DEFAULT_PAGES_PER_ZSPAGE);
+ struct zs_pool *pool;
+
+ pool = zs_create_pool(name, ZS_DEFAULT_PAGES_PER_ZSPAGE);
+ if (pool) {
+ pool->zpool = zpool;
+ pool->zpool_ops = zpool_ops;
+
+ if (zpool_ops)
+ pool->ops = &zs_zpool_ops;
+ }
+
+ return pool;
}
static void zs_zpool_destroy(void *pool)
_
Patches currently in -mm which might be from nphamcs@xxxxxxxxx are
zsmalloc-consolidate-zs_pools-migrate_lock-and-size_classs-locks.patch
zsmalloc-add-a-lru-to-zs_pool-to-keep-track-of-zspages-in-lru-order.patch
zsmalloc-add-ops-fields-to-zs_pool-to-store-evict-handlers.patch
zsmalloc-implement-writeback-mechanism-for-zsmalloc.patch
