linux-ext4 - Re: Memory allocation failed, e2fsck: aborted

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Message-ID: <20100819171620.GB3468@thunk.org>
Date:	Thu, 19 Aug 2010 13:16:20 -0400
From:	Ted Ts'o <tytso@....edu>
To:	Andre Noll <maan@...temlinux.org>
Cc:	Andreas Dilger <adilger@...ger.ca>,
	linux-ext4 <linux-ext4@...r.kernel.org>,
	Marcus Hartmann <marcus.hartmann@...bingen.mpg.de>
Subject: Re: Memory allocation failed, e2fsck: aborted

On Thu, Aug 19, 2010 at 03:10:17PM +0200, Andre Noll wrote:
> Silly question: Would it be possible to simply mmap a large enough
> file for the data and and use e.g. rbtrees for the lookups? If yes,
> osl [1] could probably be an option. It's very simple but likely too
> slow on inserts to be useful for e2fsprogs.

As I recall, you're on a 32-bit machine, right?  If so, a limitation
you may run into is simply running out of address space.  If it's not
an address space issue, we don't need to mmap anything; you could just
try enabling swap, and use the existing e2fsck code.

(I had assumed you had tried that before suggesting you use the
scratch_files tdb approach....)

					- Ted
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