linux-ext4 - Re: resize2fs running out of reserved gdt blocks.

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Message-ID: <alpine.DEB.1.10.1211140254320.2903@wormhole.tzimmola.net>
Date:	Wed, 14 Nov 2012 03:07:24 +0200 (EET)
From:	Kimmo Mustonen <k-20121112-81452+linux-ext4@...mmola.net>
To:	Theodore Ts'o <tytso@....edu>
cc:	Kimmo Mustonen <k-20121112-81452+linux-ext4@...mmola.net>,
	linux-ext4@...r.kernel.org
Subject: Re: resize2fs running out of reserved gdt blocks.

On Mon, 12 Nov 2012, Theodore Ts'o wrote:

> If you are willing to temporarily boot a bleeding edge 3.7 kernel and
> use the resize2fs from e2fsprogs 1.42.6, you'll be able to resizing
> your partition.  After you do this, you could fall back to the Debian

After a bit of fighting generating a proper .config file I managed to boot 
into 3.7.0-rc5 and resize the partition. And I just noticed that I 
accidentally used e2fsprogs 1.42.5 for doing that. Should I be worried 
about that? Now back running 3.2.0-0.bpo.3-amd64 kernel. I'm running 
e2fsck-1.42.6 to check it now. BTW, resize from 12T to 15T was amazingly 
fast (about 30 seconds) now when comparing to the "old" behaviour where it 
took hours to complete. Thanks!

> stable kernel and things should work w/o problems; the latest kernel
> and e2fsprogs code is needed just for the online resize operation.

If I continue to increase the array using 3.7.0-rc5 and resize2fs-1.42.6, 
when do you expect me to encounter problems or hit the next barrier? Is 
going past 16TB safe? How about 32TB? What is the maximum size I can reach 
with this setup? The filesystem was made with 64bit flag.

Regards,
Kimmo
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