From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from zeniv.linux.org.uk (zeniv.linux.org.uk [62.89.141.173]) (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 3B4D2B661 for ; Sun, 20 Apr 2025 04:49:08 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=62.89.141.173 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1745124551; cv=none; b=jz5EW3i6oi8+AvsXK0v4Ee0OvsD313oXp5l9qXCN+c4+3HUC0HdATiY2XFg3CJF86Bjt1pM/orJyhf8J7JJ2D/XFGEerKrkgRJ4qWmWeD9zvKn1RYzawr+uOqSoOT76M3jouuYsl2zbsSRnkroEujguuHpdaaiPR++yLV8xh97Y= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1745124551; c=relaxed/simple; bh=nqdO7E8nvI+AxwsFejPF1siu6nOWwyGBJ0IgJx0L+w8=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=EvqDtpSetzvTtrc5/TA2gRkVgbbBHdEMPt57JcT5bPFDyrGqsnyYKqCApocX/Uvt8VlyY2ThnS7hm98wjfmb2PBC5jgsRrj4lvgSZtPv5H52A96YB265nU+bQdPRJ+eIno4hDtaucZTiFLH1n2U8Qq8VaSdmHjVHLY9p+TNGWiQ= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=zeniv.linux.org.uk; spf=none smtp.mailfrom=ftp.linux.org.uk; dkim=pass (2048-bit key) header.d=linux.org.uk header.i=@linux.org.uk header.b=rVSruxHk; arc=none smtp.client-ip=62.89.141.173 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=zeniv.linux.org.uk Authentication-Results: smtp.subspace.kernel.org; spf=none smtp.mailfrom=ftp.linux.org.uk Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=linux.org.uk header.i=@linux.org.uk header.b="rVSruxHk" DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=linux.org.uk; s=zeniv-20220401; h=Sender:In-Reply-To:Content-Type: MIME-Version:References:Message-ID:Subject:Cc:To:From:Date:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description; bh=XO2KH4TBaFb4G5zVklyeR6FtP4nzJpMBFJFILLwrvis=; b=rVSruxHkwOQnZeyEXz12WiOrS4 3HxGayrwPSr1yweNFPubskGgsPaHusEHXgl8YEShZK++6Lpy2vdvK0sJjXebWnWLR001v5I16P0jI kWDB/YRXyonx5dWEQv9w8ze3kLnrQ63pUcY9Z+nO4x2WyT6D3/9l0k5B70exSTxMqqqs2QE+L0e7a gC7alOretxKnqGh4NUhAOOAZUPTtjosse8hnFred38w/ozzd0nuQ7RaiNVZA8X0KmGdGY53GXgntR FSBdkLqxeQwizMzyXm7JR7ATSitjnVJBotx7zbjo64LNvUMXliP3Oi9N5yG58HWwJSx8pgaXSa0VH zmlNl9VA==; Received: from viro by zeniv.linux.org.uk with local (Exim 4.98.2 #2 (Red Hat Linux)) id 1u6Mc5-0000000BSf0-4BxU; Sun, 20 Apr 2025 04:49:06 +0000 Date: Sun, 20 Apr 2025 05:49:05 +0100 From: Al Viro To: Miklos Szeredi Cc: linux-fsdevel@vger.kernel.org, Christian Brauner , Amir Goldstein , Jan Kara , Ian Kent Subject: Re: bad things when too many negative dentries in a directory Message-ID: <20250420044905.GR2023217@ZenIV> References: 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=us-ascii Content-Disposition: inline In-Reply-To: Sender: Al Viro On Fri, Apr 11, 2025 at 11:40:28AM +0200, Miklos Szeredi wrote: > Except for shrink_dcache_parent() I don't see any uses. And it's also > a question whether shrinking negative dentries is useful or not. One-word answer: umount.