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Date:	Mon, 2 Jun 2008 17:22:37 -0700
From:	Andrew Morton <>
Subject: Re: + ext3-fix-online-resize-bug.patch added to -mm tree

On Mon, 02 Jun 2008 17:17:22 -0700 wrote:

> The patch titled
>      ext3: fix online resize bug
> has been added to the -mm tree.  Its filename is
>      ext3-fix-online-resize-bug.patch
> Before you just go and hit "reply", please:
>    a) Consider who else should be cc'ed
>    b) Prefer to cc a suitable mailing list as well
>    c) Ideally: find the original patch on the mailing list and do a
>       reply-to-all to that, adding suitable additional cc's
> *** Remember to use Documentation/SubmitChecklist when testing your code ***
> See to find
> out what to do about this
> The current -mm tree may be found at
> ------------------------------------------------------
> Subject: ext3: fix online resize bug
> From: Josef Bacik <>
> There is a bug when we are trying to verify that the reserve inode's
> double indirect blocks point back to the primary gdt blocks.  The fix is
> obvious, we need to mod the gdb count by the addr's per block.  You can
> verify this with the following test case
> dd if=/dev/zero of=disk1 seek=1024 count=1 bs=100M
> losetup /dev/loop1 disk1
> pvcreate /dev/loop1
> vgcreate loopvg1 /dev/loop1
> lvcreate -l 100%VG loopvg1 -n looplv1
> mkfs.ext3 -J size=64 -b 1024 /dev/loopvg1/looplv1
> mount /dev/loopvg1/looplv1 /mnt/loop
> dd if=/dev/zero of=disk2 seek=1024 count=1 bs=50M
> losetup /dev/loop2 disk2
> pvcreate /dev/loop2
> vgextend loopvg1 /dev/loop2
> lvextend -l 100%VG /dev/loopvg1/looplv1
> resize2fs /dev/loopvg1/looplv1
> without this patch the resize2fs fails, with it the resize2fs succeeds.

Could I please gather some reviews and ackings on this?

Also, do we think it is 2.6.25.x material?

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