2013-09-24 01:27:33

by Chao Yu

Subject: [f2fs-dev] [PATCH RESEND] f2fs: remove unneeded write checkpoint in recover_fsync_data

Previously, recover_fsync_data still to write checkpoint when there is
nothing to recover with normal umount image.
It may reduce mount performance and flash memory lifetime, so let's remove
it.

Signed-off-by: Tan Shu <[email protected]>
Signed-off-by: Yu Chao <[email protected]>
---
fs/f2fs/recovery.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/fs/f2fs/recovery.c b/fs/f2fs/recovery.c
index 51ef5ee..d43e4cd 100644
--- a/fs/f2fs/recovery.c
+++ b/fs/f2fs/recovery.c
@@ -419,6 +419,7 @@ int recover_fsync_data(struct f2fs_sb_info *sbi)
{
struct list_head inode_list;
int err;
+ int need_writecp = 0;

fsync_entry_slab = f2fs_kmem_cache_create("f2fs_fsync_inode_entry",
sizeof(struct fsync_inode_entry), NULL);
@@ -436,6 +437,8 @@ int recover_fsync_data(struct f2fs_sb_info *sbi)
if (list_empty(&inode_list))
goto out;

+ need_writecp = 1;
+
/* step #2: recover data */
err = recover_data(sbi, &inode_list, CURSEG_WARM_NODE);
BUG_ON(!list_empty(&inode_list));
@@ -443,7 +446,7 @@ out:
destroy_fsync_dnodes(&inode_list);
kmem_cache_destroy(fsync_entry_slab);
sbi->por_doing = 0;
- if (!err)
+ if (!err && need_writecp)
write_checkpoint(sbi, false);
return err;
}
---

2013-09-24 10:12:52

by Gu Zheng

Subject: Re: [f2fs-dev] [PATCH RESEND] f2fs: remove unneeded write checkpoint in recover_fsync_data

On 09/24/2013 09:26 AM, Chao Yu wrote:

> Previously, recover_fsync_data still to write checkpoint when there is
> nothing to recover with normal umount image.
> It may reduce mount performance and flash memory lifetime, so let's remove
> it.
>
> Signed-off-by: Tan Shu <[email protected]>
> Signed-off-by: Yu Chao <[email protected]>

Reviewed-by: Gu Zheng <[email protected]>

> ---
> fs/f2fs/recovery.c | 5 ++++-
> 1 file changed, 4 insertions(+), 1 deletion(-)
>
> diff --git a/fs/f2fs/recovery.c b/fs/f2fs/recovery.c
> index 51ef5ee..d43e4cd 100644
> --- a/fs/f2fs/recovery.c
> +++ b/fs/f2fs/recovery.c
> @@ -419,6 +419,7 @@ int recover_fsync_data(struct f2fs_sb_info *sbi)
> {
> struct list_head inode_list;
> int err;
> + int need_writecp = 0;
>
> fsync_entry_slab = f2fs_kmem_cache_create("f2fs_fsync_inode_entry",
> sizeof(struct fsync_inode_entry), NULL);
> @@ -436,6 +437,8 @@ int recover_fsync_data(struct f2fs_sb_info *sbi)
> if (list_empty(&inode_list))
> goto out;
>
> + need_writecp = 1;
> +
> /* step #2: recover data */
> err = recover_data(sbi, &inode_list, CURSEG_WARM_NODE);
> BUG_ON(!list_empty(&inode_list));
> @@ -443,7 +446,7 @@ out:
> destroy_fsync_dnodes(&inode_list);
> kmem_cache_destroy(fsync_entry_slab);
> sbi->por_doing = 0;
> - if (!err)
> + if (!err && need_writecp)
> write_checkpoint(sbi, false);
> return err;
> }
> ---
>
> --
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