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From: Jeff Garzik <jeff@garzik.org>
To: Roman Zippel <zippel@linux-m68k.org>
Cc: Andrew Morton <akpm@osdl.org>,
	cmm@us.ibm.com, linux-kernel@vger.kernel.org,
	ext2-devel@lists.sourceforge.net, linux-fsdevel@vger.kernel.org
Subject: Re: [PATCH 2/9] sector_t format string
Date: Thu, 10 Aug 2006 08:02:02 -0400	[thread overview]
Message-ID: <44DB203A.6050901@garzik.org> (raw)
In-Reply-To: <Pine.LNX.4.64.0608101302270.6762@scrub.home>

Roman Zippel wrote:
> Hi,
> 
> On Wed, 9 Aug 2006, Andrew Morton wrote:
> 
>> That also being said...  does a 32-bit sector_t make any sense on a
>> 48-bit-blocknumber filesystem?  I'd have thought that we'd just make ext4
>> depend on 64-bit sector_t and be done with it.
> 
> Is this really necessary? There are a few features, which would make ext4 
> also interesting at the low end (e.g. extents). Storing 64bit values on 
> disk is fine, but they should be converted to native values as soon as 
> possible.

Consider what that means.  "converted to native" means dealing with 
truncation issues...

	Jeff




WARNING: multiple messages have this Message-ID (diff)
From: Jeff Garzik <jeff@garzik.org>
To: Roman Zippel <zippel@linux-m68k.org>
Cc: Andrew Morton <akpm@osdl.org>,
	linux-fsdevel@vger.kernel.org, ext2-devel@lists.sourceforge.net,
	cmm@us.ibm.com, linux-kernel@vger.kernel.org
Subject: Re: [PATCH 2/9] sector_t format string
Date: Thu, 10 Aug 2006 08:02:02 -0400	[thread overview]
Message-ID: <44DB203A.6050901@garzik.org> (raw)
In-Reply-To: <Pine.LNX.4.64.0608101302270.6762@scrub.home>

Roman Zippel wrote:
> Hi,
> 
> On Wed, 9 Aug 2006, Andrew Morton wrote:
> 
>> That also being said...  does a 32-bit sector_t make any sense on a
>> 48-bit-blocknumber filesystem?  I'd have thought that we'd just make ext4
>> depend on 64-bit sector_t and be done with it.
> 
> Is this really necessary? There are a few features, which would make ext4 
> also interesting at the low end (e.g. extents). Storing 64bit values on 
> disk is fine, but they should be converted to native values as soon as 
> possible.

Consider what that means.  "converted to native" means dealing with 
truncation issues...

	Jeff




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  reply	other threads:[~2006-08-10 12:02 UTC|newest]

Thread overview: 57+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2006-08-10  1:20 [PATCH 2/9] sector_t format string Mingming Cao
2006-08-10  6:40 ` Andrew Morton
2006-08-10  6:40   ` Andrew Morton
2006-08-10 11:05   ` Roman Zippel
2006-08-10 12:02     ` Jeff Garzik [this message]
2006-08-10 12:02       ` Jeff Garzik
2006-08-10 12:24       ` Roman Zippel
2006-08-10 12:25         ` Jeff Garzik
2006-08-10 12:30           ` Roman Zippel
2006-08-10 12:30             ` Roman Zippel
2006-08-10 12:33             ` Jeff Garzik
2006-08-10 13:08               ` Roman Zippel
2006-08-10 13:14                 ` Jeff Garzik
2006-08-10 13:27                   ` Roman Zippel
2006-08-10 13:27                     ` Roman Zippel
2006-08-10 13:30                     ` Jeff Garzik
2006-08-10 13:52                       ` Roman Zippel
2006-08-10 14:04                         ` [Ext2-devel] " Eric Sandeen
2006-08-10 14:19                           ` Roman Zippel
2006-08-10 14:21                             ` Jeff Garzik
2006-08-10 14:35                               ` Roman Zippel
2006-08-10 14:06                         ` Jeff Garzik
2006-08-10 14:24                           ` Roman Zippel
2006-08-10 14:26                             ` Jeff Garzik
2006-08-10 14:41                               ` Roman Zippel
2006-08-10 16:24                     ` John Stoffel
2006-08-10 16:43                       ` Roman Zippel
2006-08-10 16:54                       ` Andrew Morton
2006-08-10 16:54                         ` Andrew Morton
2006-08-10 17:24                         ` Roman Zippel
2006-08-10 17:24                           ` Roman Zippel
2006-08-10 15:31   ` [Ext2-devel] " Theodore Tso
2006-08-10 16:37     ` Roman Zippel
2006-08-10 16:37       ` Roman Zippel
2006-08-10 21:59       ` [Ext2-devel] " Mingming Cao
2006-08-10 19:17   ` Joel Becker
2006-08-10 19:17     ` Joel Becker
2006-08-10 19:44     ` Alexey Dobriyan
2006-08-10 19:44       ` Alexey Dobriyan
2006-08-10 19:57       ` Andrew Morton
2006-08-10 19:57         ` Andrew Morton
2006-08-10 20:41         ` Alexey Dobriyan
2006-08-10 20:41           ` Alexey Dobriyan
2006-08-10 20:17       ` Jeff Mahoney
2006-08-10 20:17         ` Jeff Mahoney
2006-08-11  5:57         ` Jan Engelhardt
2006-08-11  5:57           ` Jan Engelhardt
2006-08-11  8:31           ` Bernd Petrovitsch
2006-08-11  8:31             ` Bernd Petrovitsch
2006-08-11  9:07             ` Jan Engelhardt
2006-08-11  9:07               ` Jan Engelhardt
2006-08-11 14:48           ` Jeff Mahoney
2006-08-11 14:48             ` Jeff Mahoney
2006-08-11  0:59   ` Mingming Cao
2006-08-11  2:11     ` [Ext2-devel] " Eric Sandeen
2006-08-11  2:11       ` Eric Sandeen
2006-08-11 22:06     ` Mingming Cao

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