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	Wed, 04 Jun 2025 00:55:46 +0000
Date: Wed, 4 Jun 2025 01:55:46 +0100
From: Al Viro <viro@zeniv.linux.org.uk>
To: Tingmao Wang <m@maowtm.org>
Cc: =?iso-8859-1?Q?Micka=EBl_Sala=FCn?= <mic@digikod.net>,
	Song Liu <song@kernel.org>,
	=?iso-8859-1?Q?G=FCnther?= Noack <gnoack@google.com>,
	Jan Kara <jack@suse.cz>,
	Alexei Starovoitov <alexei.starovoitov@gmail.com>,
	Christian Brauner <brauner@kernel.org>,
	linux-security-module@vger.kernel.org,
	linux-fsdevel@vger.kernel.org
Subject: Re: [RFC PATCH 3/3] Restart pathwalk on rename seqcount change
Message-ID: <20250604005546.GE299672@ZenIV>
References: <cover.1748997840.git.m@maowtm.org>
 <7452abd023a695a7cb87d0a30536e9afecae0e9a.1748997840.git.m@maowtm.org>
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Sender: Al Viro <viro@ftp.linux.org.uk>

On Wed, Jun 04, 2025 at 01:45:45AM +0100, Tingmao Wang wrote:
> +		rename_seqcount = read_seqbegin(&rename_lock);
> +		if (rename_seqcount % 2 == 1) {

Please, describe the condition when that can happen, preferably
along with a reproducer.