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 1E66E33C503; Wed, 29 Oct 2025 12:20:52 +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=1761740453; cv=none; b=DtVSkHfJm7sDHOVcXIH3RU+haxpYJSUavboYykv/OE6ypdDGh48k6H1SdihP//wi+QmKJmVJtT0OpaIxqIKKynCru5SbNa3HEWGGG3IOCxfnso/vyac1YzX3DHgtdjQA541KXY2FtRvXvANo1uqPj3T0gkd6+4JGoE600Jz3stQ= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1761740453; c=relaxed/simple; bh=VMCLQ5Neu+JsCPfFhnjTC4pvJzkr6RMBoSrPUgoYfJM=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=uiZ4iP9bf9Xza+zH4XXAN4M1U0WrG3DucHp2RpxTFuXKONRmmdm3uS+bXjERPTRh9RIg86uLxL4lHmWYyqwA2b4+HCOAqgRr0Vt/vjvsjFbJnGlnD4kKvjscK04lJdEsxAwuVTf4+pBNO7PD1AaMWl4p4pGivKM6OCfUQJG5q0U= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=hf7NX1yJ; 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="hf7NX1yJ" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 3B38CC4CEFF; Wed, 29 Oct 2025 12:20:48 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1761740452; bh=VMCLQ5Neu+JsCPfFhnjTC4pvJzkr6RMBoSrPUgoYfJM=; h=From:Date:Subject:References:In-Reply-To:To:Cc:From; b=hf7NX1yJCma63j4SYnoVXZpjjvUouirA75Lxzaxq+Geqh64CAu9kfje9yZ13SF5Rp wijgw38NTK43WoCt52H5YtDd3YT8Kbzy5bwnCRbjyPZy6ICJRDP8lBVlC4rmoN7QT6 7BUzjMCaj/9SCrZfNFmC/iWQgGT+6y4CJLVecb8+CncM4WX0C06b8w3zDldzhUPIc/ jz9pzMC7lnUG0JFj3u9oSk3bq/neP1FLt/mgviIwpPWiaTrnppaw/iErouram6fSrk zHRK9eMo3y/jskjfADEQDNjjGujD2VK1qH7Egk81bX7jQGotsdz2IGmes8fhmGmIsl Z68AHtBUygv3w== From: Christian Brauner Date: Wed, 29 Oct 2025 13:20:16 +0100 Subject: [PATCH v4 03/72] nsfs: raise DCACHE_DONTCACHE explicitly Precedence: bulk X-Mailing-List: linux-fsdevel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Message-Id: <20251029-work-namespace-nstree-listns-v4-3-2e6f823ebdc0@kernel.org> References: <20251029-work-namespace-nstree-listns-v4-0-2e6f823ebdc0@kernel.org> In-Reply-To: <20251029-work-namespace-nstree-listns-v4-0-2e6f823ebdc0@kernel.org> To: linux-fsdevel@vger.kernel.org, Josef Bacik , Jeff Layton Cc: Jann Horn , Mike Yuan , =?utf-8?q?Zbigniew_J=C4=99drzejewski-Szmek?= , Lennart Poettering , Daan De Meyer , Aleksa Sarai , Amir Goldstein , Tejun Heo , Johannes Weiner , Thomas Gleixner , Alexander Viro , Jan Kara , linux-kernel@vger.kernel.org, cgroups@vger.kernel.org, bpf@vger.kernel.org, Eric Dumazet , Jakub Kicinski , netdev@vger.kernel.org, Arnd Bergmann , Christian Brauner X-Mailer: b4 0.15-dev-96507 X-Developer-Signature: v=1; a=openpgp-sha256; l=840; i=brauner@kernel.org; h=from:subject:message-id; bh=VMCLQ5Neu+JsCPfFhnjTC4pvJzkr6RMBoSrPUgoYfJM=; b=owGbwMvMwCU28Zj0gdSKO4sYT6slMWQysfUw98dyCkyXXhK7omlnfn1ev0ieX4G/1iHR5Xwv/ /V5TCnrKGVhEONikBVTZHFoNwmXW85TsdkoUwNmDisTyBAGLk4BmMh+bYb/4csMD8zOm3gk65G7 xmWDu3UH+H4lWigtarulu0g+89SzKEaG6yrR7bel2K0uHL8ZFzYlrKl4m8kcPslb4dPXWeX7Wte xAgA= X-Developer-Key: i=brauner@kernel.org; a=openpgp; fpr=4880B8C9BD0E5106FC070F4F7B3C391EFEA93624 While nsfs dentries are never hashed and thus retain_dentry() will never consider them for placing them on the LRU it isn't great to always have to go and remember that. Raise DCACHE_DONTCACHE explicitly as a visual marker that dentries aren't kept but freed immediately instead. Signed-off-by: Christian Brauner --- fs/nsfs.c | 1 + 1 file changed, 1 insertion(+) diff --git a/fs/nsfs.c b/fs/nsfs.c index 4e77eba0c8fc..0e3fe8fda5bf 100644 --- a/fs/nsfs.c +++ b/fs/nsfs.c @@ -589,6 +589,7 @@ static int nsfs_init_fs_context(struct fs_context *fc) struct pseudo_fs_context *ctx = init_pseudo(fc, NSFS_MAGIC); if (!ctx) return -ENOMEM; + ctx->s_d_flags |= DCACHE_DONTCACHE; ctx->ops = &nsfs_ops; ctx->eops = &nsfs_export_operations; ctx->dops = &ns_dentry_operations; -- 2.47.3