linux-ext4 - Re: [PATCH] EXT_MAX

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Message-Id: <1215561489.6820.20.camel@mingming-laptop>
Date:	Tue, 08 Jul 2008 16:58:09 -0700
From:	Mingming Cao <cmm@...ibm.com>
To:	Girish Shilamkar <Girish.Shilamkar@....COM>
Cc:	Ext4 Mailing List <linux-ext4@...r.kernel.org>, adilger@....COM,
	Theodore Tso <tytso@....edu>
Subject: Re: [PATCH] EXT_MAX_BLOCK for >= 16TB fs

oops, I saw your updated patch, thanks
在 2008-07-08二的 16:56 -0700，Mingming Cao写道：
> Girish, thanks for sending out the patch. Looks like it's agains ext3,
> could you please port it to ext4?
> 
> Thanks,
> Mingming
> 在 2008-07-08二的 18:52 +0530，Girish Shilamkar写道：
> > Oops ...
> > 
> > On Tue, 2008-07-08 at 18:21 +0530, Girish Shilamkar wrote:
> > > Hi,	
> > > 	Here is the patch for same.
> > > 
> > > Thanks,
> > > Girish
> > > 
> > > On Mon, 2008-07-07 at 22:25 +0530, Girish Shilamkar wrote:
> > > > Hi,
> > > > 	The magic constant EXT_MAX_BLOCK = 0xffffffff in extents code is used
> > > > in some places to return "invalid block number", and to set the extent
> > > > length = "whole file" in other places.
> > > > 	So with >= 16 TB fs we would prefer to use it differently. We can have
> > > > EXT_UNSET_BLOCK = 1 to indicate "invalid block number" as it will never
> > > > be valid block for allocation. And for "whole file" usecase we can
> > > > continue using current EXT_MAX_BLOCK
> > > > 
> > > > Regards,
> > > > Girish
> > > > 
> > > > 
> > > > 
> > > > --
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