linux-ext4 - Re: next-20250626: WARNING fs jbd2 transaction.c start_this_handle with ARM64_64K

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Message-ID: <2ee5547a-fa11-49fb-98b7-898d20457d7e@gmail.com>
Date: Thu, 3 Jul 2025 18:47:08 +0800
From: Joseph Qi <jiangqi903@...il.com>
To: Naresh Kamboju <naresh.kamboju@...aro.org>,
 Zhang Yi <yi.zhang@...weicloud.com>
Cc: linux-ext4 <linux-ext4@...r.kernel.org>, linux-fsdevel@...r.kernel.org,
 open list <linux-kernel@...r.kernel.org>, lkft-triage@...ts.linaro.org,
 Linux Regressions <regressions@...ts.linux.dev>,
 LTP List <ltp@...ts.linux.it>, Theodore Ts'o <tytso@....edu>,
 Jan Kara <jack@...e.cz>, Anders Roxell <anders.roxell@...aro.org>,
 Dan Carpenter <dan.carpenter@...aro.org>, Arnd Bergmann <arnd@...db.de>
Subject: Re: next-20250626: WARNING fs jbd2 transaction.c start_this_handle
 with ARM64_64K_PAGES



On 2025/7/3 15:26, Naresh Kamboju wrote:
> On Thu, 26 Jun 2025 at 19:23, Zhang Yi <yi.zhang@...weicloud.com> wrote:
>>
>> Hi, Naresh!
>>
>> On 2025/6/26 20:31, Naresh Kamboju wrote:
>>> Regressions noticed on arm64 devices while running LTP syscalls mmap16
>>> test case on the Linux next-20250616..next-20250626 with the extra build
>>> config fragment CONFIG_ARM64_64K_PAGES=y the kernel warning noticed.
>>>
>>> Not reproducible with 4K page size.
>>>
>>> Test environments:
>>> - Dragonboard-410c
>>> - Juno-r2
>>> - rk3399-rock-pi-4b
>>> - qemu-arm64
>>>
>>> Regression Analysis:
>>> - New regression? Yes
>>> - Reproducibility? Yes
>>>
>>> Test regression: next-20250626 LTP mmap16 WARNING fs jbd2
>>> transaction.c start_this_handle
>>>
>>> Reported-by: Linux Kernel Functional Testing <lkft@...aro.org>
>>
>> Thank you for the report. The block size for this test is 1 KB, so I
>> suspect this is the issue with insufficient journal credits that we
>> are going to resolve.
> 
> I have applied your patch set [1] and tested and the reported
> regressions did not fix.
> Am I missing anything ?
> 
> [1] https://lore.kernel.org/linux-ext4/20250611111625.1668035-1-yi.zhang@huaweicloud.com/
> 

I can also reproduce the similar warning with xfstests generic/730 under
64k page size + 4k block size.

Thanks,
Joseph