linux-kernel - Re: [PATCH 2/2] f2fs: fix to release inode correctly

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Message-ID: <20150825221736.GA12070@jaegeuk-mac02.mot.com>
Date:	Tue, 25 Aug 2015 15:17:36 -0700
From:	Jaegeuk Kim <jaegeuk@...nel.org>
To:	Chao Yu <chao2.yu@...sung.com>
Cc:	linux-f2fs-devel@...ts.sourceforge.net,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/2] f2fs: fix to release inode correctly

On Tue, Aug 25, 2015 at 09:39:55AM +0800, Chao Yu wrote:
> Hi Jaegeuk,
> 
> > -----Original Message-----
> > From: Jaegeuk Kim [mailto:jaegeuk@...nel.org]
> > Sent: Tuesday, August 25, 2015 12:54 AM
> > To: Chao Yu
> > Cc: linux-f2fs-devel@...ts.sourceforge.net; linux-kernel@...r.kernel.org
> > Subject: Re: [PATCH 2/2] f2fs: fix to release inode correctly
> > 
> 
> [snip]
> 
> > > +	 * if we skip truncate_node in remove_inode_page bacause we failed
> > > +	 * before, it's better to find another way to release resource of
> > > +	 * this inode (e.g. valid block count, node block or nid). Here we
> > > +	 * choose to add this inode to orphan list, so that we can call iput
> > > +	 * for releasing in orphan recovery flow.
> > > +	 *
> > > +	 * Note: we should add inode to orphan list before f2fs_unlock_op()
> > > +	 * so we can prevent losing this orphan when encoutering checkpoint
> > > +	 * and following suddenly power-off.
> > > +	 */
> > > +	if (err && err != -ENOENT) {
> > > +		err = acquire_orphan_inode(sbi);
> > > +		if (!err)
> > > +			add_orphan_inode(sbi, inode->i_ino);
> > 
> > 		Need this too?
> > 
> > 		if (err)
> > 			set_sbi_flag(sbi, SBI_NEED_FSCK);
> 
> We have another chance to release inode resource in following path:
>  - handle_failed_inode
>   - iput
>    - f2fs_evict_inode
>     - f2fs_truncate
>     - remove_inode_page
> 
> So I choose to set SBI_NEED_FSCK in the end of f2fs_evict_inode.

Oh, got it. :)

> 
> Thanks,
--
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