RE: [f2fs-dev] [PATCH] f2fs: remove unneeded write checkpoint inrecover_fsync_data

[Chao Yu]

Hi Gu

> -----Original Message-----
> From: Gu Zheng [mailto:guz.fnst@xxxxxxxxxxxxxx]
> Sent: Monday, September 23, 2013 9:54 AM
> To: Chao Yu
> Cc: Kim Jaegeuk; linux-f2fs-devel@xxxxxxxxxxxxxxxxxxxxx;
> linux-fsdevel@xxxxxxxxxxxxxxx; linux-kernel@xxxxxxxxxxxxxxx; 谭姝
> Subject: Re: [f2fs-dev] [PATCH] f2fs: remove unneeded write checkpoint in
> recover_fsync_data
> 
> On 09/22/2013 03:51 PM, 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 <shu.tan@xxxxxxxxxxx>
> > Signed-off-by: Yu Chao <chao2.yu@xxxxxxxxxxx>
> > ---
> >  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..6988e1b 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 is_writecp = 0;
> 
> "need_writecp" may be more suitable.

Okay, it increase readability. I will change it.

Thanks.
> 
> Thanks,
> Gu
> 
> >
> >  	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;
> >
> > +	is_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 && is_writecp)
> >  		write_checkpoint(sbi, false);
> >  	return err;
> >  }
> > ---
> >
> > --
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