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Re: inode64 question

To: Eric Sandeen <sandeen@xxxxxxxxxxx>
Subject: Re: inode64 question
From: Dave Chinner <david@xxxxxxxxxxxxx>
Date: Sat, 27 Sep 2008 11:20:19 +1000
Cc: Christoph Hellwig <hch@xxxxxxxxxxxxx>, Justin Piszcz <jpiszcz@xxxxxxxxxxxxxxx>, xfs@xxxxxxxxxxx
In-reply-to: <48DCF1FE.3080305@xxxxxxxxxxx>
Mail-followup-to: Eric Sandeen <sandeen@xxxxxxxxxxx>, Christoph Hellwig <hch@xxxxxxxxxxxxx>, Justin Piszcz <jpiszcz@xxxxxxxxxxxxxxx>, xfs@xxxxxxxxxxx
References: <alpine.DEB.1.10.0809251943420.5846@xxxxxxxxxxxxxxxx> <20080926063050.GA20516@xxxxxxxxxxxxx> <48DCF1FE.3080305@xxxxxxxxxxx>
User-agent: Mutt/1.5.18 (2008-05-17)
On Fri, Sep 26, 2008 at 09:30:22AM -0500, Eric Sandeen wrote:
> Christoph Hellwig wrote:
> > On Thu, Sep 25, 2008 at 07:44:33PM -0400, Justin Piszcz wrote:
> >> If I mount the fs with -o inode64, can I mount it again later say under  
> >> knoppix 32bit without any options, will the FS still mount?  The 64-bit  
> >> rescue cd/dvds--I have had problems with to say the least.
> > 
> > Not yet.  I'll hopefully get a patch for it into 2.6.28.
> 
> Actually it *will* at least mount, won't it?  But that's dangerous.  I
> don't think xfs sets any kind of superblock flag saying "I contain
> inodes past 2^32, don't mount on 32-bit boxes" does it?

Right. It will mount, but what happens with inodes past 2^32 is
undefined. You might be lucky - you might not....

Cheers,

Dave.
-- 
Dave Chinner
david@xxxxxxxxxxxxx

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