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 19077313536; Fri, 24 Oct 2025 10:53:16 +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=1761303197; cv=none; b=XRNhUGcLleX8ZaLyt19X8NO6IcAcP2Fr45EeaF4TQ0tnVNszqPxBR+NqaZkNz4bTg5YwaIjJa1J03yDHPPmJckrvijI90xeHbA9h/zShA0PQYuobaDdRTZaQKKanmbdihUGhMb4p26igWBvWh40ptx26t5YDkMrJYbZJCu0MTP4= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1761303197; c=relaxed/simple; bh=VMCLQ5Neu+JsCPfFhnjTC4pvJzkr6RMBoSrPUgoYfJM=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=GWuiaxSL2c3HCLpry2A6/y5vRYZNifGcZ3LcWMu4CWpV2W5wpLS+oV7u/a75lfOcVqJpKb+0X/HMVscQiTSOiZdOO+B7dsMaNH9URFvAeYNVTMjDv8M4av5U54XpZYvWBp4Ip5Ec3Yo885/gZKKns+ZwSUvuWUWQyAYtvYhe7SI= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=NJXVDo6i; 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="NJXVDo6i" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 00F45C4CEF5; Fri, 24 Oct 2025 10:53:11 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1761303196; bh=VMCLQ5Neu+JsCPfFhnjTC4pvJzkr6RMBoSrPUgoYfJM=; h=From:Date:Subject:References:In-Reply-To:To:Cc:From; b=NJXVDo6ifCMqXV3ZT+yOB+nXERgroeLT3Q3pckKV6NCQ05eOFRL1rzzpTN7p2m2IS 18r2xTd61k57/SLZMfjkg7NCHRCcUeXwJCpkaYbj0ksg7PV8sgTJp+smcL4iaC0VO6 772335U69i3d3QgSQqopoSJTvwPAEX31GDDd9/sKcf/FgNEc/cVdUf52TYcf44nAcR yngvJTBWx92wRVG0U+uc4D2MjIFIhXWJlFPIXGUZ6K7YcymK9WOe6yqW0TtIW/HB4X M2sQrzHq1KkzSZha3eKi0/ygCidCvzqWK1Zmpp/gARckXo57LCBT/PgCS+YvS/ZBc/ 216bj1wcRlkRg== From: Christian Brauner Date: Fri, 24 Oct 2025 12:52:32 +0200 Subject: [PATCH v3 03/70] 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: <20251024-work-namespace-nstree-listns-v3-3-b6241981b72b@kernel.org> References: <20251024-work-namespace-nstree-listns-v3-0-b6241981b72b@kernel.org> In-Reply-To: <20251024-work-namespace-nstree-listns-v3-0-b6241981b72b@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=owGbwMvMwCU28Zj0gdSKO4sYT6slMWT8jmqpvd1x0tv61LQQXnXO+/yfTr8IDk8tZZt+Uo5zT tsjwxdeHaUsDGJcDLJiiiwO7Sbhcst5KjYbZWrAzGFlAhnCwMUpABNh+8fIsOLsDNY1AfmbT/cL C8Wwa12a8+zF5DyPXpUDbmu/1jFtzGf475Ln7T77kuwUu2fbc3Yob/iQyrxg9q3MnvD63uXiLv3 u3AA= 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