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Subject: Re: mount btrfs takes 30 minutes, btrfs check runs out of memory
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To: btrfs <linux-btrfs@vger.kernel.org>
From: Graham Cobb <g.btrfs@cobb.uk.net>
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Date: Thu, 21 Jul 2016 16:47:56 +0100
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On 21/07/16 09:19, Qu Wenruo wrote:
> We don't usually get such large extent tree dump from a real world use
> case.

Let us know if you want some more :-)

I have a heavily used single disk BTRFS filesystem with about 3.7TB in
use and about 9 million extents.  I am happy to provide an extent dump
if it is useful to you.  Particularly if you don't need me to actually
unmount it (i.e. you can live with some inconsistencies).