* [f2fs-dev] [PATCH 1/3] f2fs: compress: remove unneeded f2fs_put_dnode()
@ 2021-05-12 9:52 ` Chao Yu
0 siblings, 0 replies; 6+ messages in thread
From: Chao Yu @ 2021-05-12 9:52 UTC (permalink / raw)
To: jaegeuk; +Cc: linux-kernel, linux-f2fs-devel
If we don't initialize dn.inode_page for f2fs_get_block(),
f2fs_get_block() will call f2fs_put_dnode() itself, so let's
remove unneeded f2fs_put_dnode() in f2fs_vm_page_mkwrite().
Signed-off-by: Chao Yu <yuchao0@huawei.com>
---
fs/f2fs/file.c | 1 -
1 file changed, 1 deletion(-)
diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c
index 1922037ea62c..9241e8e3ffff 100644
--- a/fs/f2fs/file.c
+++ b/fs/f2fs/file.c
@@ -117,7 +117,6 @@ static vm_fault_t f2fs_vm_page_mkwrite(struct vm_fault *vmf)
f2fs_do_map_lock(sbi, F2FS_GET_BLOCK_PRE_AIO, true);
set_new_dnode(&dn, inode, NULL, NULL, 0);
err = f2fs_get_block(&dn, page->index);
- f2fs_put_dnode(&dn);
f2fs_do_map_lock(sbi, F2FS_GET_BLOCK_PRE_AIO, false);
}
--
2.29.2
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^ permalink raw reply related [flat|nested] 6+ messages in thread
* [PATCH 2/3] f2fs: compress: clean up parameter of __f2fs_cluster_blocks()
2021-05-12 9:52 ` [f2fs-dev] " Chao Yu
@ 2021-05-12 9:52 ` Chao Yu
-1 siblings, 0 replies; 6+ messages in thread
From: Chao Yu @ 2021-05-12 9:52 UTC (permalink / raw)
To: jaegeuk; +Cc: linux-f2fs-devel, linux-kernel, chao, Chao Yu
Previously, in order to reuse __f2fs_cluster_blocks(),
f2fs_is_compressed_cluster() assigned a compress_ctx type variable,
which is used to pass few parameters (cc.inode, cc.cluster_size,
cc.cluster_idx), it's wasteful to allocate such large space in stack.
Let's clean up parameters of __f2fs_cluster_blocks() to avoid that.
Signed-off-by: Chao Yu <yuchao0@huawei.com>
---
fs/f2fs/compress.c | 33 +++++++++++++--------------------
1 file changed, 13 insertions(+), 20 deletions(-)
diff --git a/fs/f2fs/compress.c b/fs/f2fs/compress.c
index 8bb9e57a6db8..b6bd6862eef2 100644
--- a/fs/f2fs/compress.c
+++ b/fs/f2fs/compress.c
@@ -898,14 +898,17 @@ static bool cluster_has_invalid_data(struct compress_ctx *cc)
return false;
}
-static int __f2fs_cluster_blocks(struct compress_ctx *cc, bool compr)
+static int __f2fs_cluster_blocks(struct inode *inode,
+ unsigned int cluster_idx, bool compr)
{
struct dnode_of_data dn;
+ unsigned int cluster_size = F2FS_I(inode)->i_cluster_size;
+ unsigned int start_idx = cluster_idx <<
+ F2FS_I(inode)->i_log_cluster_size;
int ret;
- set_new_dnode(&dn, cc->inode, NULL, NULL, 0);
- ret = f2fs_get_dnode_of_data(&dn, start_idx_of_cluster(cc),
- LOOKUP_NODE);
+ set_new_dnode(&dn, inode, NULL, NULL, 0);
+ ret = f2fs_get_dnode_of_data(&dn, start_idx, LOOKUP_NODE);
if (ret) {
if (ret == -ENOENT)
ret = 0;
@@ -916,7 +919,7 @@ static int __f2fs_cluster_blocks(struct compress_ctx *cc, bool compr)
int i;
ret = 1;
- for (i = 1; i < cc->cluster_size; i++) {
+ for (i = 1; i < cluster_size; i++) {
block_t blkaddr;
blkaddr = data_blkaddr(dn.inode,
@@ -938,25 +941,15 @@ static int __f2fs_cluster_blocks(struct compress_ctx *cc, bool compr)
/* return # of compressed blocks in compressed cluster */
static int f2fs_compressed_blocks(struct compress_ctx *cc)
{
- return __f2fs_cluster_blocks(cc, true);
+ return __f2fs_cluster_blocks(cc->inode, cc->cluster_idx, true);
}
/* return # of valid blocks in compressed cluster */
-static int f2fs_cluster_blocks(struct compress_ctx *cc)
-{
- return __f2fs_cluster_blocks(cc, false);
-}
-
int f2fs_is_compressed_cluster(struct inode *inode, pgoff_t index)
{
- struct compress_ctx cc = {
- .inode = inode,
- .log_cluster_size = F2FS_I(inode)->i_log_cluster_size,
- .cluster_size = F2FS_I(inode)->i_cluster_size,
- .cluster_idx = index >> F2FS_I(inode)->i_log_cluster_size,
- };
-
- return f2fs_cluster_blocks(&cc);
+ return __f2fs_cluster_blocks(inode,
+ index >> F2FS_I(inode)->i_log_cluster_size,
+ false);
}
static bool cluster_may_compress(struct compress_ctx *cc)
@@ -1007,7 +1000,7 @@ static int prepare_compress_overwrite(struct compress_ctx *cc,
bool prealloc;
retry:
- ret = f2fs_cluster_blocks(cc);
+ ret = f2fs_is_compressed_cluster(cc->inode, start_idx);
if (ret <= 0)
return ret;
--
2.29.2
^ permalink raw reply related [flat|nested] 6+ messages in thread* [f2fs-dev] [PATCH 2/3] f2fs: compress: clean up parameter of __f2fs_cluster_blocks()
@ 2021-05-12 9:52 ` Chao Yu
0 siblings, 0 replies; 6+ messages in thread
From: Chao Yu @ 2021-05-12 9:52 UTC (permalink / raw)
To: jaegeuk; +Cc: linux-kernel, linux-f2fs-devel
Previously, in order to reuse __f2fs_cluster_blocks(),
f2fs_is_compressed_cluster() assigned a compress_ctx type variable,
which is used to pass few parameters (cc.inode, cc.cluster_size,
cc.cluster_idx), it's wasteful to allocate such large space in stack.
Let's clean up parameters of __f2fs_cluster_blocks() to avoid that.
Signed-off-by: Chao Yu <yuchao0@huawei.com>
---
fs/f2fs/compress.c | 33 +++++++++++++--------------------
1 file changed, 13 insertions(+), 20 deletions(-)
diff --git a/fs/f2fs/compress.c b/fs/f2fs/compress.c
index 8bb9e57a6db8..b6bd6862eef2 100644
--- a/fs/f2fs/compress.c
+++ b/fs/f2fs/compress.c
@@ -898,14 +898,17 @@ static bool cluster_has_invalid_data(struct compress_ctx *cc)
return false;
}
-static int __f2fs_cluster_blocks(struct compress_ctx *cc, bool compr)
+static int __f2fs_cluster_blocks(struct inode *inode,
+ unsigned int cluster_idx, bool compr)
{
struct dnode_of_data dn;
+ unsigned int cluster_size = F2FS_I(inode)->i_cluster_size;
+ unsigned int start_idx = cluster_idx <<
+ F2FS_I(inode)->i_log_cluster_size;
int ret;
- set_new_dnode(&dn, cc->inode, NULL, NULL, 0);
- ret = f2fs_get_dnode_of_data(&dn, start_idx_of_cluster(cc),
- LOOKUP_NODE);
+ set_new_dnode(&dn, inode, NULL, NULL, 0);
+ ret = f2fs_get_dnode_of_data(&dn, start_idx, LOOKUP_NODE);
if (ret) {
if (ret == -ENOENT)
ret = 0;
@@ -916,7 +919,7 @@ static int __f2fs_cluster_blocks(struct compress_ctx *cc, bool compr)
int i;
ret = 1;
- for (i = 1; i < cc->cluster_size; i++) {
+ for (i = 1; i < cluster_size; i++) {
block_t blkaddr;
blkaddr = data_blkaddr(dn.inode,
@@ -938,25 +941,15 @@ static int __f2fs_cluster_blocks(struct compress_ctx *cc, bool compr)
/* return # of compressed blocks in compressed cluster */
static int f2fs_compressed_blocks(struct compress_ctx *cc)
{
- return __f2fs_cluster_blocks(cc, true);
+ return __f2fs_cluster_blocks(cc->inode, cc->cluster_idx, true);
}
/* return # of valid blocks in compressed cluster */
-static int f2fs_cluster_blocks(struct compress_ctx *cc)
-{
- return __f2fs_cluster_blocks(cc, false);
-}
-
int f2fs_is_compressed_cluster(struct inode *inode, pgoff_t index)
{
- struct compress_ctx cc = {
- .inode = inode,
- .log_cluster_size = F2FS_I(inode)->i_log_cluster_size,
- .cluster_size = F2FS_I(inode)->i_cluster_size,
- .cluster_idx = index >> F2FS_I(inode)->i_log_cluster_size,
- };
-
- return f2fs_cluster_blocks(&cc);
+ return __f2fs_cluster_blocks(inode,
+ index >> F2FS_I(inode)->i_log_cluster_size,
+ false);
}
static bool cluster_may_compress(struct compress_ctx *cc)
@@ -1007,7 +1000,7 @@ static int prepare_compress_overwrite(struct compress_ctx *cc,
bool prealloc;
retry:
- ret = f2fs_cluster_blocks(cc);
+ ret = f2fs_is_compressed_cluster(cc->inode, start_idx);
if (ret <= 0)
return ret;
--
2.29.2
_______________________________________________
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Linux-f2fs-devel@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/linux-f2fs-devel
^ permalink raw reply related [flat|nested] 6+ messages in thread
* [PATCH 3/3] f2fs: compress: remove unneeded preallocation
2021-05-12 9:52 ` [f2fs-dev] " Chao Yu
@ 2021-05-12 9:52 ` Chao Yu
-1 siblings, 0 replies; 6+ messages in thread
From: Chao Yu @ 2021-05-12 9:52 UTC (permalink / raw)
To: jaegeuk; +Cc: linux-f2fs-devel, linux-kernel, chao, Chao Yu
We will reserve iblocks for compression saved, so during compressed
cluster overwrite, we don't need to preallocate blocks for later
write.
In addition, it adds a bug_on to detect wrong reserved iblock number
in __f2fs_cluster_blocks().
Signed-off-by: Chao Yu <yuchao0@huawei.com>
---
fs/f2fs/compress.c | 26 ++------------------------
fs/f2fs/file.c | 4 ----
2 files changed, 2 insertions(+), 28 deletions(-)
diff --git a/fs/f2fs/compress.c b/fs/f2fs/compress.c
index b6bd6862eef2..25e785e0d9fc 100644
--- a/fs/f2fs/compress.c
+++ b/fs/f2fs/compress.c
@@ -932,6 +932,8 @@ static int __f2fs_cluster_blocks(struct inode *inode,
ret++;
}
}
+
+ f2fs_bug_on(F2FS_I_SB(inode), !compr && ret != cluster_size);
}
fail:
f2fs_put_dnode(&dn);
@@ -992,21 +994,16 @@ static int prepare_compress_overwrite(struct compress_ctx *cc,
struct f2fs_sb_info *sbi = F2FS_I_SB(cc->inode);
struct address_space *mapping = cc->inode->i_mapping;
struct page *page;
- struct dnode_of_data dn;
sector_t last_block_in_bio;
unsigned fgp_flag = FGP_LOCK | FGP_WRITE | FGP_CREAT;
pgoff_t start_idx = start_idx_of_cluster(cc);
int i, ret;
- bool prealloc;
retry:
ret = f2fs_is_compressed_cluster(cc->inode, start_idx);
if (ret <= 0)
return ret;
- /* compressed case */
- prealloc = (ret < cc->cluster_size);
-
ret = f2fs_init_compress_ctx(cc);
if (ret)
return ret;
@@ -1064,25 +1061,6 @@ static int prepare_compress_overwrite(struct compress_ctx *cc,
}
}
- if (prealloc) {
- f2fs_do_map_lock(sbi, F2FS_GET_BLOCK_PRE_AIO, true);
-
- set_new_dnode(&dn, cc->inode, NULL, NULL, 0);
-
- for (i = cc->cluster_size - 1; i > 0; i--) {
- ret = f2fs_get_block(&dn, start_idx + i);
- if (ret) {
- i = cc->cluster_size;
- break;
- }
-
- if (dn.data_blkaddr != NEW_ADDR)
- break;
- }
-
- f2fs_do_map_lock(sbi, F2FS_GET_BLOCK_PRE_AIO, false);
- }
-
if (likely(!ret)) {
*fsdata = cc->rpages;
*pagep = cc->rpages[offset_in_cluster(cc, index)];
diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c
index 9241e8e3ffff..1dd69c88be36 100644
--- a/fs/f2fs/file.c
+++ b/fs/f2fs/file.c
@@ -85,10 +85,6 @@ static vm_fault_t f2fs_vm_page_mkwrite(struct vm_fault *vmf)
err = ret;
goto err;
} else if (ret) {
- if (ret < F2FS_I(inode)->i_cluster_size) {
- err = -EAGAIN;
- goto err;
- }
need_alloc = false;
}
}
--
2.29.2
^ permalink raw reply related [flat|nested] 6+ messages in thread* [f2fs-dev] [PATCH 3/3] f2fs: compress: remove unneeded preallocation
@ 2021-05-12 9:52 ` Chao Yu
0 siblings, 0 replies; 6+ messages in thread
From: Chao Yu @ 2021-05-12 9:52 UTC (permalink / raw)
To: jaegeuk; +Cc: linux-kernel, linux-f2fs-devel
We will reserve iblocks for compression saved, so during compressed
cluster overwrite, we don't need to preallocate blocks for later
write.
In addition, it adds a bug_on to detect wrong reserved iblock number
in __f2fs_cluster_blocks().
Signed-off-by: Chao Yu <yuchao0@huawei.com>
---
fs/f2fs/compress.c | 26 ++------------------------
fs/f2fs/file.c | 4 ----
2 files changed, 2 insertions(+), 28 deletions(-)
diff --git a/fs/f2fs/compress.c b/fs/f2fs/compress.c
index b6bd6862eef2..25e785e0d9fc 100644
--- a/fs/f2fs/compress.c
+++ b/fs/f2fs/compress.c
@@ -932,6 +932,8 @@ static int __f2fs_cluster_blocks(struct inode *inode,
ret++;
}
}
+
+ f2fs_bug_on(F2FS_I_SB(inode), !compr && ret != cluster_size);
}
fail:
f2fs_put_dnode(&dn);
@@ -992,21 +994,16 @@ static int prepare_compress_overwrite(struct compress_ctx *cc,
struct f2fs_sb_info *sbi = F2FS_I_SB(cc->inode);
struct address_space *mapping = cc->inode->i_mapping;
struct page *page;
- struct dnode_of_data dn;
sector_t last_block_in_bio;
unsigned fgp_flag = FGP_LOCK | FGP_WRITE | FGP_CREAT;
pgoff_t start_idx = start_idx_of_cluster(cc);
int i, ret;
- bool prealloc;
retry:
ret = f2fs_is_compressed_cluster(cc->inode, start_idx);
if (ret <= 0)
return ret;
- /* compressed case */
- prealloc = (ret < cc->cluster_size);
-
ret = f2fs_init_compress_ctx(cc);
if (ret)
return ret;
@@ -1064,25 +1061,6 @@ static int prepare_compress_overwrite(struct compress_ctx *cc,
}
}
- if (prealloc) {
- f2fs_do_map_lock(sbi, F2FS_GET_BLOCK_PRE_AIO, true);
-
- set_new_dnode(&dn, cc->inode, NULL, NULL, 0);
-
- for (i = cc->cluster_size - 1; i > 0; i--) {
- ret = f2fs_get_block(&dn, start_idx + i);
- if (ret) {
- i = cc->cluster_size;
- break;
- }
-
- if (dn.data_blkaddr != NEW_ADDR)
- break;
- }
-
- f2fs_do_map_lock(sbi, F2FS_GET_BLOCK_PRE_AIO, false);
- }
-
if (likely(!ret)) {
*fsdata = cc->rpages;
*pagep = cc->rpages[offset_in_cluster(cc, index)];
diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c
index 9241e8e3ffff..1dd69c88be36 100644
--- a/fs/f2fs/file.c
+++ b/fs/f2fs/file.c
@@ -85,10 +85,6 @@ static vm_fault_t f2fs_vm_page_mkwrite(struct vm_fault *vmf)
err = ret;
goto err;
} else if (ret) {
- if (ret < F2FS_I(inode)->i_cluster_size) {
- err = -EAGAIN;
- goto err;
- }
need_alloc = false;
}
}
--
2.29.2
_______________________________________________
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Linux-f2fs-devel@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/linux-f2fs-devel
^ permalink raw reply related [flat|nested] 6+ messages in thread