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From: "Andreas Färber" <>
To: Qu Wenruo <>
Cc:, David Sterba <>,
Subject: Re: [next-20191108] Assertion failure in space-info.c:btrfs_update_space_info()
Date: Sat, 9 Nov 2019 07:00:20 +0100
Message-ID: <> (raw)
In-Reply-To: <>

Hi Wenruo,

Am 09.11.19 um 05:01 schrieb Qu Wenruo:
> On 2019/11/9 上午11:45, Andreas Färber wrote:
>> On arm64 I'm seeing a regression between next-20191031 and next-20191105
>> that breaks boot from my btrfs rootfs: next-20191105 and later oopses on
>> found->lock, or with CONFIG_BTRFS_ASSERT asserts on a NULL "found"
>> variable in btrfs_update_space_info().
>> According to git-blame that code hasn't changed in months, and I didn't
>> spot an obvious cause among the fs/btrfs/ commis between those two tags.
> It looks like caused by "btrfs: block-group: Refactor
> btrfs_read_block_groups()".

Thanks for the quick pointer - I've reverted all fs/btrfs/ commits down
to that one and it was indeed the culprit.

> Due to another refactor, there are conflicts in that patch and is not
> resolved properly.
> Please try David's latest misc-next branch, which includes the proper
> rebased refactor.

Unfortunately that won't work as I'm developing some 100+ patches for my
linux-realtek.git, so I'll have to carry the reverts until the fix makes
it into linux-next.git.


SUSE Software Solutions Germany GmbH
Maxfeldstr. 5, 90409 Nürnberg, Germany
GF: Felix Imendörffer
HRB 36809 (AG Nürnberg)

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Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-11-09  3:45 Andreas Färber
2019-11-09  4:01 ` Qu Wenruo
2019-11-09  6:00   ` Andreas Färber [this message]
2019-11-11 18:21     ` David Sterba

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