From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id ED7AF265612; Wed, 23 Apr 2025 04:25:34 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1745382336; cv=none; b=T0PljuT9AsfemQXk3tl+d40zQcnxgJeBv4pkm2DsC2Bwz/OMFC+iIOy1JUmIrHpRi0hbGKfe84x4R7vVO4MHMzzXfsDoBy3EYMi33++2gL1LJ7OaQHbz3SLvMvDvfkFsQoqYozTAJHNQ6znlRqxyQcNPYeCfZg6byOdS9tp4nn8= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1745382336; c=relaxed/simple; bh=7t+va58EdjenVOrQKiKXrAkZ8pnQuUBAFK8eTG4zRY0=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=ivPmVJFF1vSqDfqcb94F3LaQSqgp2EkZUHZDuFLz1CS91TANbL33GYuOMP8/8Ac9/Y4qd1jLzWKhn/kWq73L0KhbyEZZKwkaVGrcOiHlh00TBRXGS2q3CLkpVJLf+DM9InGjAlysBPWsy7ZwzhmZ8UNElpuFIrsTr9jS20vjExw= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=PnC03gvi; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="PnC03gvi" Received: by smtp.kernel.org (Postfix) with ESMTPSA id E280CC4CEE2; Wed, 23 Apr 2025 04:25:33 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1745382334; bh=7t+va58EdjenVOrQKiKXrAkZ8pnQuUBAFK8eTG4zRY0=; h=From:To:Cc:Subject:Date:From; b=PnC03gviZfaLlVUArj/wcbvlugcLaQNIYcOZpQxGgsc95Y/NM9fL1fAeEDJz41GQb CPE3cpPbVv741IacZWWwZH8FrEDpszCtUNd0+Xhb4tMih2SkWK3fpbGfayCuLNL816 ZghuDURYjnHeLjXvoEBjE4hrsinGjvodaL3tgu0WH2AKs8ucInKuQDltbOZx0buWbf fuULENg9mmagq/z2zDp2jb5tkC3Jix1egEJ/DIKEQ5OrBDnsynQcpHSouYe23OW9vp QbRZe6bP9qvyKkP/3cjg29mRb0mG8jKPq42g+YJmGEztZ6LgSkqwgLh+qyn+yDqGVr /bAwTEgx5yYzg== From: trondmy@kernel.org To: linux-nfs@vger.kernel.org Cc: linux-mm@kvack.org, linux-fsdevel@vger.kernel.org Subject: [RFC PATCH 0/3] Initial NFS client support for RWF_DONTCACHE Date: Wed, 23 Apr 2025 00:25:29 -0400 Message-ID: X-Mailer: git-send-email 2.49.0 Precedence: bulk X-Mailing-List: linux-fsdevel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit From: Trond Myklebust The following patch set attempts to add support for the RWF_DONTCACHE flag in preadv2() and pwritev2() on NFS filesystems. The main issue is allowing support on 2 stage writes (i.e. unstable WRITE followed by a COMMIT) since those don't follow the current assumption that the 'dropbehind' flag can be fulfilled as soon as the writeback lock is dropped. Trond Myklebust (3): filemap: Add a helper for filesystems implementing dropbehind filemap: Mark folios as dropbehind in generic_perform_write() NFS: Enable the RWF_DONTCACHE flag for the NFS client fs/nfs/file.c | 2 ++ fs/nfs/nfs4file.c | 2 ++ fs/nfs/write.c | 12 +++++++++++- include/linux/nfs_page.h | 1 + include/linux/pagemap.h | 1 + mm/filemap.c | 21 +++++++++++++++++++++ 6 files changed, 38 insertions(+), 1 deletion(-) -- 2.49.0