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From: "Theodore Y. Ts'o" <tytso@mit.edu>
To: Christoph Hellwig <hch@infradead.org>
Cc: Dave Chinner <david@fromorbit.com>,
	Eric Biggers <ebiggers@kernel.org>,
	Linux Filesystem Development List 
	<linux-fsdevel@vger.kernel.org>,
	Ext4 Developers List <linux-ext4@vger.kernel.org>,
	linux-f2fs-devel@lists.sourceforge.net,
	linux-xfs@vger.kernel.org
Subject: Re: [PATCH] writeback: avoid double-writing the inode on a lazytime expiration
Date: Thu, 19 Mar 2020 22:46:39 -0400	[thread overview]
Message-ID: <20200320024639.GH1067245@mit.edu> (raw)
In-Reply-To: <20200312143445.GA19160@infradead.org>

On Thu, Mar 12, 2020 at 07:34:45AM -0700, Christoph Hellwig wrote:
> I haven't seen the original mail this replies to, but if we could
> get the lazytime expirty by some other means (e.g. an explicit
> callback), XFS could opt out of all the VFS inode tracking again,
> which would simplify a few things.

Part of my thinking of calling 

       inode->i_sb->s_op->dirty_inode(inode, I_DIRTY_TIME_EXPIRED);

So that it would be an explicit callback to XFS.  So why don't I break
this as two patches --- one which uses I_DIRTY_SYNC, as before, and a
second one which changes calls dirty_inode() with
I_DIRTY_TIME_EXPIRED, and with a change to XFS so that it recognizes
I_DIRTY_TIME_EXPIRED as if it were I_DIRTY_SYNC.  If this would then
allow XFS to simplify how it handles VFS tracking, you could do that
in a separate patch.

Does that work?  I'll send out the two patches, and if you can
review/ack the second patch, that would be great.

	       	      	     	  	- Ted

WARNING: multiple messages have this Message-ID (diff)
From: "Theodore Y. Ts'o" <tytso@mit.edu>
To: Christoph Hellwig <hch@infradead.org>
Cc: linux-xfs@vger.kernel.org, Dave Chinner <david@fromorbit.com>,
	linux-f2fs-devel@lists.sourceforge.net,
	Eric Biggers <ebiggers@kernel.org>,
	Linux Filesystem Development List <linux-fsdevel@vger.kernel.org>,
	Ext4 Developers List <linux-ext4@vger.kernel.org>
Subject: Re: [f2fs-dev] [PATCH] writeback: avoid double-writing the inode on a lazytime expiration
Date: Thu, 19 Mar 2020 22:46:39 -0400	[thread overview]
Message-ID: <20200320024639.GH1067245@mit.edu> (raw)
In-Reply-To: <20200312143445.GA19160@infradead.org>

On Thu, Mar 12, 2020 at 07:34:45AM -0700, Christoph Hellwig wrote:
> I haven't seen the original mail this replies to, but if we could
> get the lazytime expirty by some other means (e.g. an explicit
> callback), XFS could opt out of all the VFS inode tracking again,
> which would simplify a few things.

Part of my thinking of calling 

       inode->i_sb->s_op->dirty_inode(inode, I_DIRTY_TIME_EXPIRED);

So that it would be an explicit callback to XFS.  So why don't I break
this as two patches --- one which uses I_DIRTY_SYNC, as before, and a
second one which changes calls dirty_inode() with
I_DIRTY_TIME_EXPIRED, and with a change to XFS so that it recognizes
I_DIRTY_TIME_EXPIRED as if it were I_DIRTY_SYNC.  If this would then
allow XFS to simplify how it handles VFS tracking, you could do that
in a separate patch.

Does that work?  I'll send out the two patches, and if you can
review/ack the second patch, that would be great.

	       	      	     	  	- Ted


_______________________________________________
Linux-f2fs-devel mailing list
Linux-f2fs-devel@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/linux-f2fs-devel

  parent reply	other threads:[~2020-03-20  2:47 UTC|newest]

Thread overview: 34+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-03-06  0:45 lazytime causing inodes to remain dirty after sync? Eric Biggers
2020-03-06  0:45 ` [f2fs-dev] " Eric Biggers
2020-03-07  2:00 ` [PATCH] writeback: avoid double-writing the inode on a lazytime expiration Theodore Ts'o
2020-03-07  2:00   ` [f2fs-dev] " Theodore Ts'o
2020-03-11  3:20   ` Eric Biggers
2020-03-11  3:20     ` [f2fs-dev] " Eric Biggers
2020-03-11 12:57     ` Theodore Y. Ts'o
2020-03-11 12:57       ` [f2fs-dev] " Theodore Y. Ts'o
2020-03-12  0:07       ` Dave Chinner
2020-03-12  0:07         ` [f2fs-dev] " Dave Chinner
2020-03-12 14:34         ` Christoph Hellwig
2020-03-12 14:34           ` [f2fs-dev] " Christoph Hellwig
2020-03-12 22:39           ` Dave Chinner
2020-03-12 22:39             ` [f2fs-dev] " Dave Chinner
2020-03-20  2:46           ` Theodore Y. Ts'o [this message]
2020-03-20  2:46             ` Theodore Y. Ts'o
2020-03-20  2:52             ` [PATCH 1/2] " Theodore Ts'o
2020-03-20  2:52               ` [f2fs-dev] " Theodore Ts'o
2020-03-20  2:52               ` [PATCH 2/2] writeback, xfs: call dirty_inode() with I_DIRTY_TIME_EXPIRED when appropriate Theodore Ts'o
2020-03-20  2:52                 ` [f2fs-dev] " Theodore Ts'o
2020-03-23 17:58                 ` Theodore Y. Ts'o
2020-03-23 17:58                   ` [f2fs-dev] " Theodore Y. Ts'o
2020-03-24  8:37                   ` Christoph Hellwig
2020-03-24  8:37                     ` [f2fs-dev] " Christoph Hellwig
2020-03-24 18:43                     ` Theodore Y. Ts'o
2020-03-24 18:43                       ` [f2fs-dev] " Theodore Y. Ts'o
2020-03-25  9:20               ` [PATCH 1/2] writeback: avoid double-writing the inode on a lazytime expiration Christoph Hellwig
2020-03-25  9:20                 ` [f2fs-dev] " Christoph Hellwig
2020-03-25 15:21                 ` Theodore Y. Ts'o
2020-03-25 15:21                   ` [f2fs-dev] " Theodore Y. Ts'o
2020-03-25 15:47                   ` Darrick J. Wong
2020-03-25 15:47                     ` [f2fs-dev] " Darrick J. Wong
2020-03-11 23:54     ` [PATCH] " Dave Chinner
2020-03-11 23:54       ` [f2fs-dev] " Dave Chinner

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