From: Christoph Hellwig <hch@infradead.org>
To: Jan Kara <jack@suse.cz>
Cc: Theodore Ts'o <tytso@mit.edu>,
Linux Filesystem Development List <linux-fsdevel@vger.kernel.org>,
Ext4 Developers List <linux-ext4@vger.kernel.org>,
Linux btrfs Developers List <linux-btrfs@vger.kernel.org>,
XFS Developers <xfs@oss.sgi.com>
Subject: Re: [PATCH-v4 1/7] vfs: split update_time() into update_time() and write_time()
Date: Thu, 27 Nov 2014 07:25:04 -0800 [thread overview]
Message-ID: <20141127152504.GA15839@infradead.org> (raw)
In-Reply-To: <20141127123429.GD30152@quack.suse.cz>
On Thu, Nov 27, 2014 at 01:34:29PM +0100, Jan Kara wrote:
> But Ted changed XFS to copy timestamps to on-disk structure from the
> in-memory inode fields after VFS updated the timestamps. So the stamps
> should be coherent AFAICT, shouldn't they?
Not coherent enough. We need the XFS ilock to synchronize reading from
and writing to the time stamps. update_time() only has i_mutex, which
we can't take for the transaction commit path.
next prev parent reply other threads:[~2014-11-27 15:25 UTC|newest]
Thread overview: 36+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-11-26 10:23 [PATCH-v4 0/7] add support for a lazytime mount option Theodore Ts'o
2014-11-26 10:23 ` [PATCH-v4 1/7] vfs: split update_time() into update_time() and write_time() Theodore Ts'o
2014-11-26 19:23 ` Christoph Hellwig
2014-11-27 12:34 ` Jan Kara
2014-11-27 15:25 ` Christoph Hellwig [this message]
2014-11-27 14:41 ` Theodore Ts'o
2014-11-27 15:28 ` Christoph Hellwig
2014-11-27 15:33 ` Theodore Ts'o
2014-11-27 16:49 ` Christoph Hellwig
2014-11-27 20:27 ` Theodore Ts'o
2014-12-01 9:28 ` Christoph Hellwig
2014-12-01 15:04 ` Theodore Ts'o
2014-12-01 17:18 ` David Sterba
2014-12-02 9:20 ` Christoph Hellwig
2014-12-02 15:09 ` Theodore Ts'o
2014-11-26 10:23 ` [PATCH-v4 2/7] vfs: add support for a lazytime mount option Theodore Ts'o
2014-11-27 13:14 ` Jan Kara
2014-11-27 20:19 ` Theodore Ts'o
2014-11-28 12:41 ` Jan Kara
2014-11-27 23:00 ` Theodore Ts'o
2014-11-28 5:36 ` Theodore Ts'o
2014-11-28 16:24 ` Jan Kara
2014-11-26 10:23 ` [PATCH-v4 3/7] vfs: don't let the dirty time inodes get more than a day stale Theodore Ts'o
2014-11-26 10:23 ` [PATCH-v4 4/7] vfs: add lazytime tracepoints for better debugging Theodore Ts'o
2014-11-26 10:23 ` [PATCH-v4 5/7] vfs: add find_active_inode_nowait() function Theodore Ts'o
2014-11-26 10:23 ` [PATCH-v4 6/7] ext4: add support for a lazytime mount option Theodore Ts'o
2014-11-26 19:24 ` Christoph Hellwig
2014-11-26 22:48 ` Dave Chinner
2014-11-26 23:10 ` Andreas Dilger
2014-11-26 23:35 ` Dave Chinner
2014-11-27 13:27 ` Jan Kara
2014-11-27 13:32 ` Jan Kara
2014-11-27 15:25 ` Theodore Ts'o
2014-11-27 15:41 ` Jan Kara
2014-11-27 20:13 ` Theodore Ts'o
2014-11-26 10:23 ` [PATCH-v4 7/7] btrfs: add an is_readonly() so btrfs can use common code for update_time() Theodore Ts'o
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20141127152504.GA15839@infradead.org \
--to=hch@infradead.org \
--cc=jack@suse.cz \
--cc=linux-btrfs@vger.kernel.org \
--cc=linux-ext4@vger.kernel.org \
--cc=linux-fsdevel@vger.kernel.org \
--cc=tytso@mit.edu \
--cc=xfs@oss.sgi.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).