* [PATCH 3/3] Ext2: remove the static function release_blocks to optimize the kernel
@ 2013-02-06 20:03 Wang Shilong
0 siblings, 0 replies; 3+ messages in thread
From: Wang Shilong @ 2013-02-06 20:03 UTC (permalink / raw)
To: Jan Kara; +Cc: linux-ext4
From: Wang Shilong <wangsl-fnst@cn.fujitsu.com>
Because the static function 'release_blocks' is only called
when releasing blocks,it will be more simple and efficient to
call the function 'percpu_counter_add' directly.
Signed-off-by: Wang Shilong <wangsl-fnst@cn.fujitsu.com>
---
fs/ext2/balloc.c | 11 +----------
1 file changed, 1 insertion(+), 10 deletions(-)
diff --git a/fs/ext2/balloc.c b/fs/ext2/balloc.c
index 9d372bf..d5a6afd 100644
--- a/fs/ext2/balloc.c
+++ b/fs/ext2/balloc.c
@@ -159,15 +159,6 @@ read_block_bitmap(struct super_block *sb, unsigned int block_group)
return bh;
}
-static void release_blocks(struct super_block *sb, int count)
-{
- if (count) {
- struct ext2_sb_info *sbi = EXT2_SB(sb);
-
- percpu_counter_add(&sbi->s_freeblocks_counter, count);
- }
-}
^ permalink raw reply related [flat|nested] 3+ messages in thread* [PATCH 1/3] Ext2: remove the overhead check about sb in the function ext2_new_blocks
@ 2013-02-06 6:14 Wang shilong
2013-02-06 6:14 ` [PATCH 3/3] Ext2: remove the static function release_blocks to optimize the kernel Wang shilong
0 siblings, 1 reply; 3+ messages in thread
From: Wang shilong @ 2013-02-06 6:14 UTC (permalink / raw)
To: jack; +Cc: linux-ext4, Wang shilong, Wang Shilong
From: Wang Shilong <wangsl-fnst@cn.fujitsu.com>
It can be guranteed that inode->i_sb should not be null in vfs.
So here the check about it is overhead.
Signed-off-by: Wang Shilong <wangsl-fnst@cn.fujitsu.com>
---
fs/ext2/balloc.c | 4 ----
1 file changed, 4 deletions(-)
diff --git a/fs/ext2/balloc.c b/fs/ext2/balloc.c
index 1c36139..22993a0 100644
--- a/fs/ext2/balloc.c
+++ b/fs/ext2/balloc.c
@@ -1239,10 +1239,6 @@ ext2_fsblk_t ext2_new_blocks(struct inode *inode, ext2_fsblk_t goal,
*errp = -ENOSPC;
sb = inode->i_sb;
- if (!sb) {
- printk("ext2_new_blocks: nonexistent device");
- return 0;
- }
/*
* Check quota for allocation of this block.
--
1.7.11.7
^ permalink raw reply related [flat|nested] 3+ messages in thread* [PATCH 3/3] Ext2: remove the static function release_blocks to optimize the kernel
2013-02-06 6:14 [PATCH 1/3] Ext2: remove the overhead check about sb in the function ext2_new_blocks Wang shilong
@ 2013-02-06 6:14 ` Wang shilong
2013-02-06 12:48 ` Jan Kara
0 siblings, 1 reply; 3+ messages in thread
From: Wang shilong @ 2013-02-06 6:14 UTC (permalink / raw)
To: jack; +Cc: linux-ext4, Wang shilong, Wang Shilong
From: Wang Shilong <wangsl-fnst@cn.fujitsu.com>
Because the static function 'release_blocks' is only called
when releasing blocks,it will be more simple and efficient to
call the function 'percpu_counter_add' directly.
Signed-off-by: Wang Shilong <wangsl-fnst@cn.fujitsu.com>
---
fs/ext2/balloc.c | 11 +----------
1 file changed, 1 insertion(+), 10 deletions(-)
diff --git a/fs/ext2/balloc.c b/fs/ext2/balloc.c
index 9d372bf..d5a6afd 100644
--- a/fs/ext2/balloc.c
+++ b/fs/ext2/balloc.c
@@ -159,15 +159,6 @@ read_block_bitmap(struct super_block *sb, unsigned int block_group)
return bh;
}
-static void release_blocks(struct super_block *sb, int count)
-{
- if (count) {
- struct ext2_sb_info *sbi = EXT2_SB(sb);
-
- percpu_counter_add(&sbi->s_freeblocks_counter, count);
- }
-}
^ permalink raw reply related [flat|nested] 3+ messages in thread* Re: [PATCH 3/3] Ext2: remove the static function release_blocks to optimize the kernel
2013-02-06 6:14 ` [PATCH 3/3] Ext2: remove the static function release_blocks to optimize the kernel Wang shilong
@ 2013-02-06 12:48 ` Jan Kara
0 siblings, 0 replies; 3+ messages in thread
From: Jan Kara @ 2013-02-06 12:48 UTC (permalink / raw)
To: Wang shilong; +Cc: jack, linux-ext4, Wang Shilong
On Wed 06-02-13 14:14:28, Wang shilong wrote:
> From: Wang Shilong <wangsl-fnst@cn.fujitsu.com>
>
> Because the static function 'release_blocks' is only called
> when releasing blocks,it will be more simple and efficient to
> call the function 'percpu_counter_add' directly.
Thanks. The patch looks good. Just it depends on the previous patch so
please resend it once with the previous one fixed. Thanks.
Honza
>
> Signed-off-by: Wang Shilong <wangsl-fnst@cn.fujitsu.com>
> ---
> fs/ext2/balloc.c | 11 +----------
> 1 file changed, 1 insertion(+), 10 deletions(-)
>
> diff --git a/fs/ext2/balloc.c b/fs/ext2/balloc.c
> index 9d372bf..d5a6afd 100644
> --- a/fs/ext2/balloc.c
> +++ b/fs/ext2/balloc.c
> @@ -159,15 +159,6 @@ read_block_bitmap(struct super_block *sb, unsigned int block_group)
> return bh;
> }
>
> -static void release_blocks(struct super_block *sb, int count)
> -{
> - if (count) {
> - struct ext2_sb_info *sbi = EXT2_SB(sb);
> -
> - percpu_counter_add(&sbi->s_freeblocks_counter, count);
> - }
> -}
> -
> static void group_adjust_blocks(struct super_block *sb, int group_no,
> struct ext2_group_desc *desc, struct buffer_head *bh, int count)
> {
> @@ -569,7 +560,7 @@ do_more:
> error_return:
> brelse(bitmap_bh);
> if (freed) {
> - release_blocks(sb, freed);
> + percpu_counter_add(&sbi->s_freeblocks_counter, freed);
> dquot_free_block_nodirty(inode, freed);
> mark_inode_dirty(inode);
> }
> --
> 1.7.11.7
>
--
Jan Kara <jack@suse.cz>
SUSE Labs, CR
^ permalink raw reply [flat|nested] 3+ messages in thread
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