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Date: Mon, 14 Sep 2020 17:05:14 +0800
From: Chao Yu <yuchao0@...wei.com>
To: <jaegeuk@...nel.org>
CC: <linux-f2fs-devel@...ts.sourceforge.net>,
<linux-kernel@...r.kernel.org>, <chao@...nel.org>,
Chao Yu <yuchao0@...wei.com>
Subject: [PATCH v2 2/2] f2fs: compress: introduce cic/dic slab cache
Add two slab caches: "f2fs_cic_entry" and "f2fs_dic_entry" for memory
allocation of compress_io_ctx and decompress_io_ctx structure.
Signed-off-by: Chao Yu <yuchao0@...wei.com>
---
v2:
- fix -Wreturn-type warning
fs/f2fs/compress.c | 67 +++++++++++++++++++++++++++++++++++++++++-----
fs/f2fs/f2fs.h | 4 +++
fs/f2fs/super.c | 6 +++++
3 files changed, 70 insertions(+), 7 deletions(-)
diff --git a/fs/f2fs/compress.c b/fs/f2fs/compress.c
index c6fcd68df71a..10a9f39b9d6a 100644
--- a/fs/f2fs/compress.c
+++ b/fs/f2fs/compress.c
@@ -17,6 +17,9 @@
#include "node.h"
#include <trace/events/f2fs.h>
+static struct kmem_cache *cic_entry_slab;
+static struct kmem_cache *dic_entry_slab;
+
static void *page_array_alloc(struct inode *inode)
{
struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
@@ -1193,7 +1196,7 @@ static int f2fs_write_compressed_pages(struct compress_ctx *cc,
fio.version = ni.version;
- cic = f2fs_kzalloc(sbi, sizeof(struct compress_io_ctx), GFP_NOFS);
+ cic = kmem_cache_zalloc(cic_entry_slab, GFP_NOFS);
if (!cic)
goto out_put_dnode;
@@ -1308,7 +1311,7 @@ static int f2fs_write_compressed_pages(struct compress_ctx *cc,
f2fs_put_page(cc->cpages[i], 1);
}
out_put_cic:
- kfree(cic);
+ kmem_cache_free(cic_entry_slab, cic);
out_put_dnode:
f2fs_put_dnode(&dn);
out_unlock_op:
@@ -1343,7 +1346,7 @@ void f2fs_compress_write_end_io(struct bio *bio, struct page *page)
}
page_array_free(cic->inode, cic->rpages);
- kfree(cic);
+ kmem_cache_free(cic_entry_slab, cic);
}
static int f2fs_write_raw_pages(struct compress_ctx *cc,
@@ -1457,18 +1460,17 @@ int f2fs_write_multi_pages(struct compress_ctx *cc,
struct decompress_io_ctx *f2fs_alloc_dic(struct compress_ctx *cc)
{
- struct f2fs_sb_info *sbi = F2FS_I_SB(cc->inode);
struct decompress_io_ctx *dic;
pgoff_t start_idx = start_idx_of_cluster(cc);
int i;
- dic = f2fs_kzalloc(sbi, sizeof(struct decompress_io_ctx), GFP_NOFS);
+ dic = kmem_cache_zalloc(dic_entry_slab, GFP_NOFS);
if (!dic)
return ERR_PTR(-ENOMEM);
dic->rpages = page_array_alloc(cc->inode);
if (!dic->rpages) {
- kfree(dic);
+ kmem_cache_free(dic_entry_slab, dic);
return ERR_PTR(-ENOMEM);
}
@@ -1533,7 +1535,7 @@ void f2fs_free_dic(struct decompress_io_ctx *dic)
}
page_array_free(dic->inode, dic->rpages);
- kfree(dic);
+ kmem_cache_free(dic_entry_slab, dic);
}
void f2fs_decompress_end_io(struct page **rpages,
@@ -1583,3 +1585,54 @@ void f2fs_destroy_page_array_cache(struct f2fs_sb_info *sbi)
{
kmem_cache_destroy(sbi->page_array_slab);
}
+
+static int __init f2fs_init_cic_cache(void)
+{
+ cic_entry_slab = f2fs_kmem_cache_create("f2fs_cic_entry",
+ sizeof(struct compress_io_ctx));
+ if (!cic_entry_slab)
+ return -ENOMEM;
+ return 0;
+}
+
+static void f2fs_destroy_cic_cache(void)
+{
+ kmem_cache_destroy(cic_entry_slab);
+}
+
+static int __init f2fs_init_dic_cache(void)
+{
+ dic_entry_slab = f2fs_kmem_cache_create("f2fs_dic_entry",
+ sizeof(struct decompress_io_ctx));
+ if (!dic_entry_slab)
+ return -ENOMEM;
+ return 0;
+}
+
+static void f2fs_destroy_dic_cache(void)
+{
+ kmem_cache_destroy(dic_entry_slab);
+}
+
+int __init f2fs_init_compress_cache(void)
+{
+ int err;
+
+ err = f2fs_init_cic_cache();
+ if (err)
+ goto out;
+ err = f2fs_init_dic_cache();
+ if (err)
+ goto free_cic;
+ return 0;
+free_cic:
+ f2fs_destroy_cic_cache();
+out:
+ return -ENOMEM;
+}
+
+void f2fs_destroy_compress_cache(void)
+{
+ f2fs_destroy_dic_cache();
+ f2fs_destroy_cic_cache();
+}
diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h
index 50953b442220..ca3f3ce4b2e3 100644
--- a/fs/f2fs/f2fs.h
+++ b/fs/f2fs/f2fs.h
@@ -3940,6 +3940,8 @@ void f2fs_destroy_compress_ctx(struct compress_ctx *cc);
void f2fs_init_compress_info(struct f2fs_sb_info *sbi);
int f2fs_init_page_array_cache(struct f2fs_sb_info *sbi);
void f2fs_destroy_page_array_cache(struct f2fs_sb_info *sbi);
+int __init f2fs_init_compress_cache(void);
+void f2fs_destroy_compress_cache(void);
#else
static inline bool f2fs_is_compressed_page(struct page *page) { return false; }
static inline bool f2fs_is_compress_backend_ready(struct inode *inode)
@@ -3958,6 +3960,8 @@ static inline int f2fs_init_compress_mempool(void) { return 0; }
static inline void f2fs_destroy_compress_mempool(void) { }
static inline int f2fs_init_page_array_cache(struct f2fs_sb_info *sbi) { return 0; }
static inline void f2fs_destroy_page_array_cache(struct f2fs_sb_info *sbi) { }
+static inline int __init f2fs_init_compress_cache(void) { return 0; }
+static inline void f2fs_destroy_compress_cache(void) { }
#endif
static inline void set_compress_context(struct inode *inode)
diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c
index d7336914d2b3..427ce4cbd124 100644
--- a/fs/f2fs/super.c
+++ b/fs/f2fs/super.c
@@ -4047,7 +4047,12 @@ static int __init init_f2fs_fs(void)
err = f2fs_init_compress_mempool();
if (err)
goto free_bioset;
+ err = f2fs_init_compress_cache();
+ if (err)
+ goto free_compress_mempool;
return 0;
+free_compress_mempool:
+ f2fs_destroy_compress_mempool();
free_bioset:
f2fs_destroy_bioset();
free_bio_enrty_cache:
@@ -4079,6 +4084,7 @@ static int __init init_f2fs_fs(void)
static void __exit exit_f2fs_fs(void)
{
+ f2fs_destroy_compress_cache();
f2fs_destroy_compress_mempool();
f2fs_destroy_bioset();
f2fs_destroy_bio_entry_cache();
--
2.26.2
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