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15.21.0181.012; Tue, 7 Jul 2026 11:00:57 +0000 Message-ID: <9bb5dbfe-bb82-4ca6-8a14-5c434bd54051@windriver.com> Date: Tue, 7 Jul 2026 19:00:47 +0800 User-Agent: Mozilla Thunderbird Subject: Re: [syzbot ci] Re: ext4: deferred iput framework for EA inodes To: Jan Kara Cc: adilger.kernel@dilger.ca, brauner@kernel.org, libaokun@linux.alibaba.com, linux-ext4@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, ojaswin@linux.ibm.com, ritesh.list@gmail.com, tytso@mit.edu, viro@zeniv.linux.org.uk, yi.zhang@huawei.com, syzbot@lists.linux.dev, syzkaller-bugs@googlegroups.com, syzbot ci References: <20260702152225.4071746-1-yun.zhou@windriver.com> <6a46ecbd.52c20a74.1f8b39.000b.GAE@google.com> Content-Language: en-US From: "Zhou, Yun" In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit X-ClientProxiedBy: SE2P216CA0084.KORP216.PROD.OUTLOOK.COM (2603:1096:101:2c6::8) To CH0PR11MB5332.namprd11.prod.outlook.com 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definitions=main-2607070106 Hi Jan, On 7/3/26 22:02, Jan Kara wrote: > > On Thu 02-07-26 15:57:01, syzbot ci wrote: >> syzbot ci has tested the following series >> >> [v13] ext4: deferred iput framework for EA inodes >> https://lore.kernel.org/all/20260702152225.4071746-1-yun.zhou@windriver.com >> * [PATCH v13 1/4] fs: add iput_if_not_last() helper >> * [PATCH v13 2/4] ext4: introduce ext4_put_ea_inode() for safe deferred iput >> * [PATCH v13 3/4] ext4: convert all EA inode iput() calls to ext4_put_ea_inode() >> * [PATCH v13 4/4] ext4: remove ea_inode_array mechanism in favor of ext4_put_ea_inode() >> >> and found the following issue: >> WARNING in ext4_journal_check_start > > Good catch. We need to flush the pending work with iputs also in > ext4_sync_fs() which should also take care of this race with remount > read-only (and the same issue with filesystem freezing etc.). > Sorry for the late reply—I missed it because I receive too many emails from syzbot. I've now reconfigured my filtering rules. Regarding the issue reported by syzbot CI, would it be better to add flush_delayed_work in __ext4_remount before sb->s_flags |= SB_RDONLY? That would make the race window smaller. Also, should I resend the v14 series, or submit a separate patch specifically for this fix? BR, Yun