linux-kernel - Re: [PATCH v2 0/5] More unit test for mballoc

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Date: Sun, 25 Feb 2024 08:07:19 -0800
From: Guenter Roeck <linux@...ck-us.net>
To: Kemeng Shi <shikemeng@...weicloud.com>
Cc: tytso@....edu, adilger.kernel@...ger.ca, linux-ext4@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 0/5] More unit test for mballoc

On Wed, Jan 03, 2024 at 06:48:55PM +0800, Kemeng Shi wrote:
> This series covers more function to mark on-disk bitmap. Besides, some
> code which is relevant to buddy cache is also tested.
> Before more work is done, I want to be sure I'm not on a wrong
> direction!
> 
> v1->v2:
> -Fix unused variable warning which is reported at
> https://lore.kernel.org/lkml/202311260042.kMxL6DnL-lkp@intel.com/T/
> 

With this patch series in linux-text, and with various debug options
enabled, unit tests for ext4 fail widely and result in crashes.

[    4.798582]         # Subtest: test_new_blocks_simple
[    4.803166] BUG: key 00000000000000a8 has not been registered!
[    4.803443] ------------[ cut here ]------------
ILLOPC: ffffffff9050cbf4: 0f 0b
[    4.803521] DEBUG_LOCKS_WARN_ON(1)
[    4.803720] WARNING: CPU: 0 PID: 154 at kernel/locking/lockdep.c:4895 lockdep_init_map_type+0x224/0x250
..
[    4.833277]         # Subtest: test_mb_mark_used
[    4.835875] ------------[ cut here ]------------
[    4.836055] kernel BUG at fs/ext4/mballoc.c:2053!

Guenter