Date: Wed, 3 May 2006 21:56:35 +0400
From: Sergey Vlasov <vsu@altlinux.ru>
To: Markus M_ller <mm@priv.de>
Cc: linux-kernel@vger.kernel.org
Subject: Re: Reiserfsck dies
Message-Id: <20060503215635.4b3a28bf.vsu@altlinux.ru>
In-Reply-To: <4458C48B.8040703@priv.de>
References: <4458C48B.8040703@priv.de>
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On Wed, 03 May 2006 16:56:11 +0200 Markus M_ller wrote:

> reiserfsck told me that I have to run --rebuild-tree to fix all errors.=20
> But this don't work (see below), I tried two times (every time I am=20
> waiting 28 hours).

Apparently you have a huge filesystem (374936503 blocks - about 1.5 TB,
if these are 4KB blocks).  reiserfsck --rebuild-tree works by reading
every data block on the filesystem, finding blocks which look like
reiserfs tree nodes and rebuilding the tree from that nodes - so it
would take a long time, even if the volume was almost empty.

> If I mount the filesystem, there are no files in it.=20
> What can I do?

[skip]
> Pass 1 (will try to insert 423131 leaves):
> ####### Pass 1 #######
> Looking for allocable blocks .. Killed
[skip]
> Out of memory: Killed process 5622 (reiserfsck).

reiserfsck may need lots of memory (especially with such a huge FS) ...

> stacker:/# cat /proc/meminfo
> MemTotal:       512716 kB
> MemFree:        413660 kB
> Buffers:         20268 kB
> Cached:          47324 kB
> SwapCached:          0 kB
> Active:          19500 kB
> Inactive:        56656 kB
> HighTotal:           0 kB
> HighFree:            0 kB
> LowTotal:       512716 kB
> LowFree:        413660 kB
> SwapTotal:           0 kB
> SwapFree:            0 kB

... and you have only 512 MB with no swap.  Try to add some swap space -
then reiserfsck might eventually complete.

AFAIK, the only way to recover reiserfs after --rebuild-tree has been
attempted is to run "reiserfsck --rebuild-tree" to completion.

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