From: Christoph Hellwig <hch@infradead.org>
To: "Theodore Ts'o" <tytso@mit.edu>
Cc: linux-fsdevel@vger.kernel.org,
Ext4 Developers List <linux-ext4@vger.kernel.org>,
xfs@oss.sgi.com, linux-btrfs@vger.kernel.org
Subject: Re: [PATCH-v2 0/5] add support for a lazytime mount option
Date: Mon, 24 Nov 2014 01:07:55 -0800 [thread overview]
Message-ID: <20141124090755.GA28534@infradead.org> (raw)
In-Reply-To: <1416675267-2191-1-git-send-email-tytso@mit.edu>
What's the test coverage for this? xfstest generic/192 tests that
atime is persisted over remounts, which we had a bug with when XFS
used to have a lazy atime implementation somewhat similar to the
proposal.
We should have something similar for c/mtime as well. Also a test to
ensure timestamps are persisted afer a fsync, although right now I can't
imagine how to do that genericly as no other filesystem seems to have
an equivaent to XFS_IOC_GOINGDOWN.
It seems you also handle i_version updates lazily. although that's
not mentioned anywhere. I actually have a clarification request out on
the IETF NFSv4 list about the persistance requirements for the change
counter but I've not seen an answer to it yet.
WARNING: multiple messages have this Message-ID (diff)
From: Christoph Hellwig <hch@infradead.org>
To: Theodore Ts'o <tytso@mit.edu>
Cc: linux-fsdevel@vger.kernel.org,
Ext4 Developers List <linux-ext4@vger.kernel.org>,
linux-btrfs@vger.kernel.org, xfs@oss.sgi.com
Subject: Re: [PATCH-v2 0/5] add support for a lazytime mount option
Date: Mon, 24 Nov 2014 01:07:55 -0800 [thread overview]
Message-ID: <20141124090755.GA28534@infradead.org> (raw)
In-Reply-To: <1416675267-2191-1-git-send-email-tytso@mit.edu>
What's the test coverage for this? xfstest generic/192 tests that
atime is persisted over remounts, which we had a bug with when XFS
used to have a lazy atime implementation somewhat similar to the
proposal.
We should have something similar for c/mtime as well. Also a test to
ensure timestamps are persisted afer a fsync, although right now I can't
imagine how to do that genericly as no other filesystem seems to have
an equivaent to XFS_IOC_GOINGDOWN.
It seems you also handle i_version updates lazily. although that's
not mentioned anywhere. I actually have a clarification request out on
the IETF NFSv4 list about the persistance requirements for the change
counter but I've not seen an answer to it yet.
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next prev parent reply other threads:[~2014-11-24 9:07 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-11-22 16:54 [PATCH-v2 0/5] add support for a lazytime mount option Theodore Ts'o
2014-11-22 16:54 ` Theodore Ts'o
2014-11-22 16:54 ` [PATCH-v2 1/5] fs: split update_time() into update_time() and write_time() Theodore Ts'o
2014-11-22 16:54 ` Theodore Ts'o
2014-11-22 16:54 ` [PATCH-v2 2/5] vfs: add support for a lazytime mount option Theodore Ts'o
2014-11-22 16:54 ` Theodore Ts'o
2014-11-22 16:54 ` [PATCH-v2 3/5] vfs: don't let the dirty time inodes get more than a day stale Theodore Ts'o
2014-11-22 16:54 ` Theodore Ts'o
2014-11-24 12:27 ` Rasmus Villemoes
2014-11-24 12:27 ` Rasmus Villemoes
2014-11-24 17:10 ` Theodore Ts'o
2014-11-24 17:10 ` Theodore Ts'o
2014-11-22 16:54 ` [PATCH-v2 4/5] vfs: add lazytime tracepoints for better debugging Theodore Ts'o
2014-11-22 16:54 ` Theodore Ts'o
2014-11-22 16:54 ` [PATCH-v2 5/5] ext4: add support for a lazytime mount option Theodore Ts'o
2014-11-22 16:54 ` Theodore Ts'o
2014-11-24 9:07 ` Christoph Hellwig [this message]
2014-11-24 9:07 ` [PATCH-v2 0/5] " Christoph Hellwig
2014-11-24 11:57 ` Theodore Ts'o
2014-11-24 11:57 ` Theodore Ts'o
2014-11-24 22:11 ` J. Bruce Fields
2014-11-24 22:11 ` J. Bruce Fields
2014-11-25 0:32 ` Theodore Ts'o
2014-11-25 0:32 ` Theodore Ts'o
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