linux-ext4 - Re: [PATCH] ext4: Automatic setting of {INODE,BLOCK}

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Message-ID: <CAGBYx2bU=G0X4GDZSjznnn12yAxJXs=RWn_x1EvHM8RGbkdk0A@mail.gmail.com>
Date:	Thu, 25 Oct 2012 15:44:48 +0800
From:	Yongqiang Yang <xiaoqiangnk@...il.com>
To:	Tomas Racek <tracek@...hat.com>
Cc:	linux-ext4@...r.kernel.org, lczerner@...hat.com
Subject: Re: [PATCH] ext4: Automatic setting of {INODE,BLOCK}_UNINIT flags

Does it make sense in no journal mode?

Thanks,
Yongqiang.

On Thu, Oct 25, 2012 at 3:25 PM, Tomas Racek <tracek@...hat.com> wrote:
> When last inode from bg is freed, set the INODE_UNINIT flag, similarly
> when last block is freed, set BLOCK_UNINIT flag. This can speed up
> subsequent fsck run.
>
> Signed-off-by: Tomas Racek <tracek@...hat.com>
> ---
>  fs/ext4/ialloc.c  | 4 ++++
>  fs/ext4/mballoc.c | 4 ++++
>  2 files changed, 8 insertions(+)
>
> diff --git a/fs/ext4/ialloc.c b/fs/ext4/ialloc.c
> index 4facdd2..6e4b982 100644
> --- a/fs/ext4/ialloc.c
> +++ b/fs/ext4/ialloc.c
> @@ -289,6 +289,10 @@ void ext4_free_inode(handle_t *handle, struct inode *inode)
>
>         count = ext4_free_inodes_count(sb, gdp) + 1;
>         ext4_free_inodes_set(sb, gdp, count);
> +
> +       if (count == EXT4_INODES_PER_GROUP(sb))
> +               gdp->bg_flags |= cpu_to_le16(EXT4_BG_INODE_UNINIT);
> +
>         if (is_directory) {
>                 count = ext4_used_dirs_count(sb, gdp) - 1;
>                 ext4_used_dirs_set(sb, gdp, count);
> diff --git a/fs/ext4/mballoc.c b/fs/ext4/mballoc.c
> index 526e553..28bce35 100644
> --- a/fs/ext4/mballoc.c
> +++ b/fs/ext4/mballoc.c
> @@ -4665,6 +4665,10 @@ do_more:
>
>         ret = ext4_free_group_clusters(sb, gdp) + count_clusters;
>         ext4_free_group_clusters_set(sb, gdp, ret);
> +
> +       if(ret == EXT4_BLOCKS_PER_GROUP(sb))
> +               gdp->bg_flags |= cpu_to_le16(EXT4_BG_BLOCK_UNINIT);
> +
>         ext4_block_bitmap_csum_set(sb, block_group, gdp, bitmap_bh);
>         ext4_group_desc_csum_set(sb, block_group, gdp);
>         ext4_unlock_group(sb, block_group);
> --
> 1.7.11.7
>
> --
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-- 
Best Wishes
Yongqiang Yang
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