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Wed, 13 Aug 2025 21:28:24 -0400 Received: from mail.maildlp.com (unknown [172.19.163.235]) by dggsgout11.his.huawei.com (SkyGuard) with ESMTPS id 4c2SKl4B24zYQtxZ for ; Thu, 14 Aug 2025 09:27:55 +0800 (CST) Received: from mail02.huawei.com (unknown [10.116.40.128]) by mail.maildlp.com (Postfix) with ESMTP id 320361A058E for ; Thu, 14 Aug 2025 09:27:54 +0800 (CST) Received: from [10.174.179.80] (unknown [10.174.179.80]) by APP4 (Coremail) with SMTP id gCh0CgAHgxOVO51oPzBtDg--.8664S3; Thu, 14 Aug 2025 09:27:52 +0800 (CST) Message-ID: <42aace87-1b89-4b17-96f1-3efbabc4acf3@huaweicloud.com> Date: Thu, 14 Aug 2025 09:27:49 +0800 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH 6.16 000/627] 6.16.1-rc1 review To: Greg Kroah-Hartman , Naresh Kamboju Cc: stable@vger.kernel.org, patches@lists.linux.dev, linux-kernel@vger.kernel.org, torvalds@linux-foundation.org, akpm@linux-foundation.org, linux@roeck-us.net, shuah@kernel.org, patches@kernelci.org, lkft-triage@lists.linaro.org, pavel@denx.de, jonathanh@nvidia.com, f.fainelli@gmail.com, sudipm.mukherjee@gmail.com, srw@sladewatkins.net, rwarsow@gmx.de, conor@kernel.org, hargar@microsoft.com, broonie@kernel.org, achill@achill.org, qemu-devel@nongnu.org, =?UTF-8?Q?Alex_Benn=C3=A9e?= , Arnd Bergmann , Dan Carpenter , Anders Roxell , Ben Copeland , LTP List , chrubis , Petr Vorel , Ian Rogers , linux-perf-users@vger.kernel.org, Joseph Qi , Jan Kara , linux-fsdevel@vger.kernel.org, linux-ext4 , Zhang Yi , Theodore Ts'o , Baokun Li References: <20250812173419.303046420@linuxfoundation.org> <2025081300-frown-sketch-f5bd@gregkh> <2025081311-purifier-reviver-aeb2@gregkh> Content-Language: en-US From: Zhang Yi In-Reply-To: <2025081311-purifier-reviver-aeb2@gregkh> Content-Type: text/plain; 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envelope-from=yi.zhang@huaweicloud.com; helo=dggsgout11.his.huawei.com X-Spam_score_int: -41 X-Spam_score: -4.2 X-Spam_bar: ---- X-Spam_report: (-4.2 / 5.0 requ) BAYES_00=-1.9, RCVD_IN_DNSWL_MED=-2.3, RCVD_IN_VALIDITY_RPBL_BLOCKED=0.001, RCVD_IN_VALIDITY_SAFE_BLOCKED=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-Mailman-Approved-At: Thu, 14 Aug 2025 09:09:24 -0400 X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org On 2025/8/13 22:53, Greg Kroah-Hartman wrote: > On Wed, Aug 13, 2025 at 08:01:51PM +0530, Naresh Kamboju wrote: >> Hi Greg, >> >>>> 2) >>>> >>>> The following list of LTP syscalls failure noticed on qemu-arm64 with >>>> stable-rc 6.16.1-rc1 with CONFIG_ARM64_64K_PAGES=y build configuration. >>>> >>>> Most failures report ENOSPC (28) or mkswap errors, which may be related >>>> to disk space handling in the 64K page configuration on qemu-arm64. >>>> >>>> The issue is reproducible on multiple runs. >>>> >>>> * qemu-arm64, ltp-syscalls - 64K page size test failures list, >>>> >>>> - fallocate04 >>>> - fallocate05 >>>> - fdatasync03 >>>> - fsync01 >>>> - fsync04 >>>> - ioctl_fiemap01 >>>> - swapoff01 >>>> - swapoff02 >>>> - swapon01 >>>> - swapon02 >>>> - swapon03 >>>> - sync01 >>>> - sync_file_range02 >>>> - syncfs01 >>>> >>>> Reproducibility: >>>> - 64K config above listed test fails >>>> - 4K config above listed test pass. >>>> >>>> Regression Analysis: >>>> - New regression? yes >>> >>> Regression from 6.16? Or just from 6.15.y? >> >> Based on available data, the issue is not present in v6.16 or v6.15. >> >> Anders, bisected this regression and found, >> >> ext4: correct the reserved credits for extent conversion >> [ Upstream commit 95ad8ee45cdbc321c135a2db895d48b374ef0f87 ] >> >> Report lore link, >> >> https://lore.kernel.org/stable/CA+G9fYtBnCSa2zkaCn-oZKYz8jz5FZj0HS7DjSfMeamq3AXqNg@mail.gmail.com/ > > Great, and that's also affecting 6.17-rc1 so we are "bug compatible"? > :) > Hi, This issue has already fixed in 6.17-rc1 through this series: https://lore.kernel.org/linux-ext4/20250707140814.542883-1-yi.zhang@huaweicloud.com/ To fix this issue in 6.16, it's necessary to backport the whole series instead of just pick 5137d6c8906b ("ext4: fix insufficient credits calculation in ext4_meta_trans_blocks()") and 95ad8ee45cdb {"ext4: correct the reserved credits for extent conversion"). Otherwise, this will make the problem more likely to occur. Thanks, Yi.