From: Joel Becker <Joel.Becker@oracle.com>
To: Tao Ma <tao.ma@oracle.com>
Cc: Dave Chinner <david@fromorbit.com>,
Linus Torvalds <torvalds@linux-foundation.org>,
Linux Kernel <linux-kernel@vger.kernel.org>,
ocfs2-devel@oss.oracle.com, Dave Chinner <dchinner@redhat.com>,
Christoph Hellwig <hch@lst.de>, Mark Fasheh <mfasheh@suse.com>
Subject: [Ocfs2-devel] [PATCH 2/2] ocfs2: No need to zero pages past i_size. i_size v2
Date: Tue, 6 Jul 2010 00:10:31 -0700 [thread overview]
Message-ID: <20100706071031.GE13023@mail.oracle.com> (raw)
In-Reply-To: <4C3137A2.8040409@oracle.com>
On Mon, Jul 05, 2010 at 09:38:42AM +0800, Tao Ma wrote:
> btw, do we ever have a chance that start + wc->w_num_pages >
> end_index? I can't find it.
Of course. If you have a 1MB clustersize, w_num_pages will be
256. But if you are only writing the first page of the cluster,
end_index is only 1.
Joel
--
"If you took all of the grains of sand in the world, and lined
them up end to end in a row, you'd be working for the government!"
- Mr. Interesting
Joel Becker
Consulting Software Developer
Oracle
E-mail: joel.becker at oracle.com
Phone: (650) 506-8127
WARNING: multiple messages have this Message-ID (diff)
From: Joel Becker <Joel.Becker@oracle.com>
To: Tao Ma <tao.ma@oracle.com>
Cc: Dave Chinner <david@fromorbit.com>,
Linus Torvalds <torvalds@linux-foundation.org>,
Linux Kernel <linux-kernel@vger.kernel.org>,
ocfs2-devel@oss.oracle.com, Dave Chinner <dchinner@redhat.com>,
Christoph Hellwig <hch@lst.de>, Mark Fasheh <mfasheh@suse.com>
Subject: Re: [PATCH 2/2] ocfs2: No need to zero pages past i_size. i_size v2
Date: Tue, 6 Jul 2010 00:10:31 -0700 [thread overview]
Message-ID: <20100706071031.GE13023@mail.oracle.com> (raw)
In-Reply-To: <4C3137A2.8040409@oracle.com>
On Mon, Jul 05, 2010 at 09:38:42AM +0800, Tao Ma wrote:
> btw, do we ever have a chance that start + wc->w_num_pages >
> end_index? I can't find it.
Of course. If you have a 1MB clustersize, w_num_pages will be
256. But if you are only writing the first page of the cluster,
end_index is only 1.
Joel
--
"If you took all of the grains of sand in the world, and lined
them up end to end in a row, you'd be working for the government!"
- Mr. Interesting
Joel Becker
Consulting Software Developer
Oracle
E-mail: joel.becker@oracle.com
Phone: (650) 506-8127
next prev parent reply other threads:[~2010-07-06 7:10 UTC|newest]
Thread overview: 78+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-06-28 17:35 [Ocfs2-devel] [PATCH] Revert "writeback: limit write_cache_pages integrity scanning to current EOF" Joel Becker
2010-06-28 17:35 ` Joel Becker
2010-06-29 0:24 ` [Ocfs2-devel] " Dave Chinner
2010-06-29 0:24 ` Dave Chinner
2010-06-29 0:54 ` [Ocfs2-devel] " Joel Becker
2010-06-29 0:54 ` Joel Becker
2010-06-29 1:12 ` [Ocfs2-devel] " Linus Torvalds
2010-06-29 1:12 ` Linus Torvalds
2010-06-29 1:58 ` [Ocfs2-devel] " Joel Becker
2010-06-29 1:58 ` Joel Becker
2010-06-29 2:20 ` Linus Torvalds
2010-06-29 2:20 ` Linus Torvalds
2010-06-29 2:44 ` Dave Chinner
2010-06-29 2:44 ` Dave Chinner
2010-06-29 8:16 ` Joel Becker
2010-06-29 8:16 ` Joel Becker
2010-06-30 1:30 ` Joel Becker
2010-06-30 1:30 ` Joel Becker
2010-07-06 19:06 ` Joel Becker
2010-07-06 19:06 ` Joel Becker
2010-06-29 1:56 ` Dave Chinner
2010-06-29 1:56 ` Dave Chinner
2010-06-29 2:04 ` [Ocfs2-devel] " Joel Becker
2010-06-29 2:04 ` Joel Becker
2010-06-29 2:27 ` [Ocfs2-devel] " Dave Chinner
2010-06-29 2:27 ` Dave Chinner
2010-06-29 7:18 ` [Ocfs2-devel] " Joel Becker
2010-06-29 7:18 ` Joel Becker
2010-07-02 22:49 ` [Ocfs2-devel] [PATCH] ocfs2: Zero the tail cluster when extending past i_size Joel Becker
2010-07-02 22:49 ` Joel Becker
2010-07-03 21:32 ` [Ocfs2-devel] [PATCH 1/2] ocfs2: Zero the tail cluster when extending past i_size v2 Joel Becker
2010-07-03 21:32 ` Joel Becker
2010-07-03 21:33 ` [Ocfs2-devel] [PATCH 2/2] ocfs2: No need to zero pages past i_size. " Joel Becker
2010-07-03 21:33 ` Joel Becker
2010-07-04 15:13 ` [Ocfs2-devel] " Tao Ma
2010-07-04 15:13 ` Tao Ma
2010-07-05 1:38 ` [Ocfs2-devel] " Tao Ma
2010-07-05 1:38 ` Tao Ma
2010-07-06 7:10 ` Joel Becker [this message]
2010-07-06 7:10 ` Joel Becker
2010-07-06 7:09 ` [Ocfs2-devel] " Joel Becker
2010-07-06 7:09 ` Joel Becker
2010-07-06 18:39 ` [Ocfs2-devel] " Joel Becker
2010-07-06 18:39 ` Joel Becker
2010-07-05 3:51 ` [Ocfs2-devel] [PATCH 1/2] ocfs2: Zero the tail cluster when extending past " Tao Ma
2010-07-05 3:51 ` Tao Ma
2010-07-06 7:17 ` [Ocfs2-devel] " Joel Becker
2010-07-06 7:17 ` Joel Becker
2010-07-06 7:54 ` [Ocfs2-devel] " Tao Ma
2010-07-06 7:54 ` Tao Ma
2010-07-06 11:58 ` [Ocfs2-devel] " Joel Becker
2010-07-06 11:58 ` Joel Becker
2010-07-07 0:42 ` [Ocfs2-devel] " Tao Ma
2010-07-07 0:42 ` Tao Ma
2010-07-07 2:03 ` [Ocfs2-devel] " Joel Becker
2010-07-07 2:03 ` Joel Becker
2010-07-06 18:48 ` [Ocfs2-devel] " Joel Becker
2010-07-06 18:48 ` Joel Becker
2010-07-06 18:57 ` [Ocfs2-devel] " Joel Becker
2010-07-06 18:57 ` Joel Becker
2010-07-07 11:16 ` [Ocfs2-devel] [PATCH 0/3] ocfs2: Tail zeroing fixes Joel Becker
2010-07-07 11:16 ` Joel Becker
2010-07-12 22:45 ` [Ocfs2-devel] " Joel Becker
2010-07-12 22:45 ` Joel Becker
2010-07-07 11:16 ` [Ocfs2-devel] [PATCH 1/3] ocfs2: When zero extending, do it by page Joel Becker
2010-07-07 11:16 ` Joel Becker
2010-07-07 15:19 ` [Ocfs2-devel] " Tao Ma
2010-07-07 15:19 ` Tao Ma
2010-07-07 20:04 ` [Ocfs2-devel] " Joel Becker
2010-07-07 20:04 ` Joel Becker
2010-07-08 3:44 ` [Ocfs2-devel] " Tao Ma
2010-07-08 3:44 ` Tao Ma
2010-07-08 9:51 ` [Ocfs2-devel] " Joel Becker
2010-07-08 9:51 ` Joel Becker
2010-07-07 11:16 ` [Ocfs2-devel] [PATCH 2/3] ocfs2: Zero the tail cluster when extending past i_size Joel Becker
2010-07-07 11:16 ` Joel Becker
2010-07-07 11:16 ` [Ocfs2-devel] [PATCH 3/3] ocfs2: No need to zero pages " Joel Becker
2010-07-07 11:16 ` Joel Becker
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