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Message-ID: <20240312153901.3441-2-hannes@cmpxchg.org>
Date: Tue, 12 Mar 2024 11:34:12 -0400
From: Johannes Weiner <hannes@...xchg.org>
To: Andrew Morton <akpm@...ux-foundation.org>
Cc: Yosry Ahmed <yosryahmed@...gle.com>,
Nhat Pham <nphamcs@...il.com>,
Chengming Zhou <zhouchengming@...edance.com>,
linux-mm@...ck.org,
linux-kernel@...r.kernel.org,
Chengming Zhou <chengming.zhou@...ux.dev>
Subject: [PATCH 2/2] mm: zpool: return pool size in pages
All zswap backends track their pool sizes in pages. Currently they
multiply by PAGE_SIZE for zswap, only for zswap to divide again in
order to do limit math. Report pages directly.
Signed-off-by: Johannes Weiner <hannes@...xchg.org>
Acked-by: Yosry Ahmed <yosryahmed@...gle.com>
Reviewed-by: Chengming Zhou <chengming.zhou@...ux.dev>
Reviewed-by: Nhat Pham <nphamcs@...il.com>
---
include/linux/zpool.h | 4 ++--
mm/z3fold.c | 10 +++++-----
mm/zbud.c | 10 +++++-----
mm/zpool.c | 10 +++++-----
mm/zsmalloc.c | 6 +++---
mm/zswap.c | 6 +++---
6 files changed, 23 insertions(+), 23 deletions(-)
diff --git a/include/linux/zpool.h b/include/linux/zpool.h
index 3296438eec06..a67d62b79698 100644
--- a/include/linux/zpool.h
+++ b/include/linux/zpool.h
@@ -53,7 +53,7 @@ void *zpool_map_handle(struct zpool *pool, unsigned long handle,
void zpool_unmap_handle(struct zpool *pool, unsigned long handle);
-u64 zpool_get_total_size(struct zpool *pool);
+u64 zpool_get_total_pages(struct zpool *pool);
/**
@@ -91,7 +91,7 @@ struct zpool_driver {
enum zpool_mapmode mm);
void (*unmap)(void *pool, unsigned long handle);
- u64 (*total_size)(void *pool);
+ u64 (*total_pages)(void *pool);
};
void zpool_register_driver(struct zpool_driver *driver);
diff --git a/mm/z3fold.c b/mm/z3fold.c
index 7ab05621052d..2ebfed32871b 100644
--- a/mm/z3fold.c
+++ b/mm/z3fold.c
@@ -1237,12 +1237,12 @@ static void z3fold_unmap(struct z3fold_pool *pool, unsigned long handle)
}
/**
- * z3fold_get_pool_size() - gets the z3fold pool size in pages
+ * z3fold_get_pool_pages() - gets the z3fold pool size in pages
* @pool: pool whose size is being queried
*
* Returns: size in pages of the given pool.
*/
-static u64 z3fold_get_pool_size(struct z3fold_pool *pool)
+static u64 z3fold_get_pool_pages(struct z3fold_pool *pool)
{
return atomic64_read(&pool->pages_nr);
}
@@ -1402,9 +1402,9 @@ static void z3fold_zpool_unmap(void *pool, unsigned long handle)
z3fold_unmap(pool, handle);
}
-static u64 z3fold_zpool_total_size(void *pool)
+static u64 z3fold_zpool_total_pages(void *pool)
{
- return z3fold_get_pool_size(pool) * PAGE_SIZE;
+ return z3fold_get_pool_pages(pool);
}
static struct zpool_driver z3fold_zpool_driver = {
@@ -1417,7 +1417,7 @@ static struct zpool_driver z3fold_zpool_driver = {
.free = z3fold_zpool_free,
.map = z3fold_zpool_map,
.unmap = z3fold_zpool_unmap,
- .total_size = z3fold_zpool_total_size,
+ .total_pages = z3fold_zpool_total_pages,
};
MODULE_ALIAS("zpool-z3fold");
diff --git a/mm/zbud.c b/mm/zbud.c
index 2190cc1f37b3..e9836fff9438 100644
--- a/mm/zbud.c
+++ b/mm/zbud.c
@@ -365,13 +365,13 @@ static void zbud_unmap(struct zbud_pool *pool, unsigned long handle)
}
/**
- * zbud_get_pool_size() - gets the zbud pool size in pages
+ * zbud_get_pool_pages() - gets the zbud pool size in pages
* @pool: pool whose size is being queried
*
* Returns: size in pages of the given pool. The pool lock need not be
* taken to access pages_nr.
*/
-static u64 zbud_get_pool_size(struct zbud_pool *pool)
+static u64 zbud_get_pool_pages(struct zbud_pool *pool)
{
return pool->pages_nr;
}
@@ -410,9 +410,9 @@ static void zbud_zpool_unmap(void *pool, unsigned long handle)
zbud_unmap(pool, handle);
}
-static u64 zbud_zpool_total_size(void *pool)
+static u64 zbud_zpool_total_pages(void *pool)
{
- return zbud_get_pool_size(pool) * PAGE_SIZE;
+ return zbud_get_pool_pages(pool);
}
static struct zpool_driver zbud_zpool_driver = {
@@ -425,7 +425,7 @@ static struct zpool_driver zbud_zpool_driver = {
.free = zbud_zpool_free,
.map = zbud_zpool_map,
.unmap = zbud_zpool_unmap,
- .total_size = zbud_zpool_total_size,
+ .total_pages = zbud_zpool_total_pages,
};
MODULE_ALIAS("zpool-zbud");
diff --git a/mm/zpool.c b/mm/zpool.c
index 846410479c2f..b9fda1fa857d 100644
--- a/mm/zpool.c
+++ b/mm/zpool.c
@@ -321,16 +321,16 @@ void zpool_unmap_handle(struct zpool *zpool, unsigned long handle)
}
/**
- * zpool_get_total_size() - The total size of the pool
+ * zpool_get_total_pages() - The total size of the pool
* @zpool: The zpool to check
*
- * This returns the total size in bytes of the pool.
+ * This returns the total size in pages of the pool.
*
- * Returns: Total size of the zpool in bytes.
+ * Returns: Total size of the zpool in pages.
*/
-u64 zpool_get_total_size(struct zpool *zpool)
+u64 zpool_get_total_pages(struct zpool *zpool)
{
- return zpool->driver->total_size(zpool->pool);
+ return zpool->driver->total_pages(zpool->pool);
}
/**
diff --git a/mm/zsmalloc.c b/mm/zsmalloc.c
index 7d7cb3eaabe0..b42d3545ca85 100644
--- a/mm/zsmalloc.c
+++ b/mm/zsmalloc.c
@@ -399,9 +399,9 @@ static void zs_zpool_unmap(void *pool, unsigned long handle)
zs_unmap_object(pool, handle);
}
-static u64 zs_zpool_total_size(void *pool)
+static u64 zs_zpool_total_pages(void *pool)
{
- return zs_get_total_pages(pool) << PAGE_SHIFT;
+ return zs_get_total_pages(pool);
}
static struct zpool_driver zs_zpool_driver = {
@@ -414,7 +414,7 @@ static struct zpool_driver zs_zpool_driver = {
.free = zs_zpool_free,
.map = zs_zpool_map,
.unmap = zs_zpool_unmap,
- .total_size = zs_zpool_total_size,
+ .total_pages = zs_zpool_total_pages,
};
MODULE_ALIAS("zpool-zsmalloc");
diff --git a/mm/zswap.c b/mm/zswap.c
index 1a5cc7298306..9fdf4c76d5ea 100644
--- a/mm/zswap.c
+++ b/mm/zswap.c
@@ -512,18 +512,18 @@ static unsigned long zswap_accept_thr_pages(void)
unsigned long zswap_total_pages(void)
{
struct zswap_pool *pool;
- u64 total = 0;
+ unsigned long total = 0;
rcu_read_lock();
list_for_each_entry_rcu(pool, &zswap_pools, list) {
int i;
for (i = 0; i < ZSWAP_NR_ZPOOLS; i++)
- total += zpool_get_total_size(pool->zpools[i]);
+ total += zpool_get_total_pages(pool->zpools[i]);
}
rcu_read_unlock();
- return total >> PAGE_SHIFT;
+ return total;
}
/*********************************
--
2.44.0
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