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with ESMTP id 962E660153; Tue, 20 Jan 2026 13:20:14 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 672F2C16AAE; Tue, 20 Jan 2026 13:20:07 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1768915214; bh=2q4hi60bazvcilbJNiRaJ1JXOg/rrf7FitaJTcVDTb8=; h=Subject:From:To:Cc:Date:In-Reply-To:References:From; b=BtzWd0dX8xBjfl+Rd+agDtCA43l7AAkFA/UsKIDl9a7o4TBkTAytTBAuUr0Qyuh75 2N7fm3ZAHeK0SWNrzZRWqfSRMDMMqT3mpkwnv7lmITCL2CwjeO/xepTD7gyE7YHLl2 gM+m3vW5GHY1o82g5ze5dgIN3bLPNkibscKkg0isZRuq/GGlvGiuzt3eWvg3a5Pl2D 7Xay7ZOUmajqckfhjbuheztwcouRty0bEYtF4WcXwaAwtOWOwNnr8WWChOTQqMKgHX B428QQ2/IOEF+hZbWNjI/5dC68aGe6BBGOTCHedvnLkRZD6kmneMW0MiewKug88TR0 XdKyqpB0lgjYQ== Message-ID: <9b64bed72e43d0bf24e9b1e3bc770c4a87082762.camel@kernel.org> Subject: Re: [PATCH v2 01/31] Documentation: document EXPORT_OP_NOLOCKS From: Jeff Layton To: Christoph Hellwig Cc: Christian Brauner , Alexander Viro , Chuck Lever , NeilBrown , Olga Kornievskaia , Dai Ngo , Tom Talpey , Amir Goldstein , Hugh Dickins , Baolin Wang , Andrew Morton , Theodore Ts'o , Andreas Dilger , Jan Kara , Gao Xiang , Chao Yu , Yue Hu , Jeffle Xu , Sandeep Dhavale , Hongbo Li , Chunhai Guo , Carlos Maiolino , Ilya Dryomov , Alex Markuze , Viacheslav Dubeyko , Chris Mason , David Sterba , Luis de Bethencourt , Salah Triki , Phillip Lougher , Steve French , Paulo Alcantara , Ronnie Sahlberg , Shyam Prasad N , Bharath SM , Miklos Szeredi , Mike Marshall , Martin Brandenburg , Mark Fasheh , Joel Becker , Joseph Qi , Konstantin Komarov , Ryusuke Konishi , Trond Myklebust , Anna Schumaker , Dave Kleikamp , David Woodhouse , Richard Weinberger , Jan Kara , Andreas Gruenbacher , OGAWA Hirofumi , Jaegeuk Kim , Jonathan Corbet , David Laight , Dave Chinner , linux-nfs@vger.kernel.org, linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, linux-ext4@vger.kernel.org, linux-erofs@lists.ozlabs.org, linux-xfs@vger.kernel.org, ceph-devel@vger.kernel.org, linux-btrfs@vger.kernel.org, linux-cifs@vger.kernel.org, samba-technical@lists.samba.org, linux-unionfs@vger.kernel.org, devel@lists.orangefs.org, ocfs2-devel@lists.linux.dev, ntfs3@lists.linux.dev, linux-nilfs@vger.kernel.org, jfs-discussion@lists.sourceforge.net, linux-mtd@lists.infradead.org, gfs2@lists.linux.dev, linux-f2fs-devel@lists.sourceforge.net, linux-doc@vger.kernel.org Date: Tue, 20 Jan 2026 08:20:06 -0500 In-Reply-To: References: <20260119-exportfs-nfsd-v2-0-d93368f903bd@kernel.org> <20260119-exportfs-nfsd-v2-1-d93368f903bd@kernel.org> Autocrypt: addr=jlayton@kernel.org; prefer-encrypt=mutual; keydata=mQINBE6V0TwBEADXhJg7s8wFDwBMEvn0qyhAnzFLTOCHooMZyx7XO7dAiIhDSi7G1NPxw n8jdFUQMCR/GlpozMFlSFiZXiObE7sef9rTtM68ukUyZM4pJ9l0KjQNgDJ6Fr342Htkjxu/kFV1Wv egyjnSsFt7EGoDjdKqr1TS9syJYFjagYtvWk/UfHlW09X+jOh4vYtfX7iYSx/NfqV3W1D7EDi0PqV T2h6v8i8YqsATFPwO4nuiTmL6I40ZofxVd+9wdRI4Db8yUNA4ZSP2nqLcLtFjClYRBoJvRWvsv4lm 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 5NS06y0Z 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Some > > + filesystems cannot properly support file locking as implemented by > > + nfsd. A case in point is reexport of NFS itself, which can't be do= ne > > + safely without coordinating the grace period handling. Other clust= ered > > + and networked filesystems can be problematic here as well. >=20 > I'm not sure this is very useful. It really needs to document what > locking semantics nfs expects, because otherwise no reader will know > if they set this or not. Fair point. I'll see if I can draft something better. Suggestions welcome. --=20 Jeff Layton