From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from lists.sourceforge.net (lists.sourceforge.net [216.105.38.7]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 96C78E77188 for ; Mon, 6 Jan 2025 21:18:37 +0000 (UTC) Received: from [127.0.0.1] (helo=sfs-ml-2.v29.lw.sourceforge.com) by sfs-ml-2.v29.lw.sourceforge.com with esmtp (Exim 4.95) (envelope-from ) id 1tUuUd-0003XT-FX; Mon, 06 Jan 2025 21:18:35 +0000 Received: from [172.30.29.66] (helo=mx.sourceforge.net) by sfs-ml-2.v29.lw.sourceforge.com with esmtps (TLS1.2) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.95) (envelope-from ) id 1tUuUc-0003XH-NE for linux-f2fs-devel@lists.sourceforge.net; Mon, 06 Jan 2025 21:18:34 +0000 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=sourceforge.net; s=x; h=In-Reply-To:Content-Type:MIME-Version:References: Message-ID:Subject:Cc:To:From:Date:Sender:Reply-To:Content-Transfer-Encoding: Content-ID:Content-Description:Resent-Date:Resent-From:Resent-Sender: Resent-To:Resent-Cc:Resent-Message-ID:List-Id:List-Help:List-Unsubscribe: List-Subscribe:List-Post:List-Owner:List-Archive; bh=JGBFC2N9csMUolDzs+X6YnC1EX6aR9uG0ApE8rUd7Ok=; b=BFYroq+nN9OfvImRKFL8HA+BIn G55tcfLuGLajmS1UGYOlb781LJxEVPSSg2BbGEW4wVW+Xu7JW/41J/szEtRGGW8lY/5nRq4TvlYyt odZ8wwEah6fa6Qy3RzL7BxMWrVuza6n4c7HekCpccDPV3x61+IApPic+dCM2F3ZZimqw=; DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=sf.net; s=x ; h=In-Reply-To:Content-Type:MIME-Version:References:Message-ID:Subject:Cc:To :From:Date:Sender:Reply-To:Content-Transfer-Encoding:Content-ID: Content-Description:Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc :Resent-Message-ID:List-Id:List-Help:List-Unsubscribe:List-Subscribe: List-Post:List-Owner:List-Archive; bh=JGBFC2N9csMUolDzs+X6YnC1EX6aR9uG0ApE8rUd7Ok=; b=lq7MUnZ32/t4tGBKHXOrA3UJCx XIbdc9eoTMQPrLyINBTh0jG7GnB3956MwxHAwlJ2llP8UOVLGofFuaaR0v3IgWjmEggGNsWgrydwE HM69vofEv+aMFs2TaqjeKvc9xHdgRkdDVAuY30GiKANKlML4vDEvl0P0OIiqYRhd0bQc=; Received: from dfw.source.kernel.org ([139.178.84.217]) by sfi-mx-2.v28.lw.sourceforge.com with esmtps (TLS1.2:ECDHE-RSA-AES256-GCM-SHA384:256) (Exim 4.95) id 1tUuUc-00080n-5O for linux-f2fs-devel@lists.sourceforge.net; Mon, 06 Jan 2025 21:18:34 +0000 Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by dfw.source.kernel.org (Postfix) with ESMTP id AAF5C5C41CA; Mon, 6 Jan 2025 21:17:47 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 3B983C4CED2; Mon, 6 Jan 2025 21:18:28 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1736198308; bh=R8cjwFD4KkgYdBXkteN978ebXomInOYBCFtzyQpNdiU=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=gmTr9apRd/Xr1QBsyBE4q/yWG0J2R62jCvv08VLmeu2nTLPL8NxI612nl1Jc/xGxj CHAxCy9PoNraVP3dVeOB8+pAXI0gnGstNX9tM+Yr3Ie+IMt16ng1+422FNyaO4o5U8 MhyUfucKcxa6PXANtygz6AvAwyoyPe54/cghMlg8Msu0K0nSh+fh1v/60pu4FADHzD qgn+yzXRgIzi6Ry0mQxixx1mPbD1BNt74JlFQBvZTJYJSCAzlsU0ediB7ArZn+dksJ BueXA3DDMgr9jGUFugu01/v2lIN5FzCoRdfoYAjmfU1Hf3HkR2ckceppeIa46HXe2Y 8sLBfm820iqDA== Date: Mon, 6 Jan 2025 21:18:26 +0000 To: Christoph Hellwig Message-ID: References: <20241220172136.1028811-1-chullee@google.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: X-Headers-End: 1tUuUc-00080n-5O Subject: Re: [f2fs-dev] [PATCH v2] f2fs: Introduce linear search for dentries X-BeenThere: linux-f2fs-devel@lists.sourceforge.net X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , From: Jaegeuk Kim via Linux-f2fs-devel Reply-To: Jaegeuk Kim Cc: linux-kernel@vger.kernel.org, linux-f2fs-devel@lists.sourceforge.net Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: linux-f2fs-devel-bounces@lists.sourceforge.net On 01/03, Christoph Hellwig wrote: > On Mon, Dec 23, 2024 at 04:57:35PM +0000, Jaegeuk Kim wrote: > > > That means you have really bad worst case behavior for negative lookups. > > > I don' think this is in any way a good idea. > > > > No surprise. Please check: > > https://lore.kernel.org/lkml/Z1mzu4Eg6CPURra3@google.com/ > > Well, I think Linus finally gave in to revert the offending commit > after the usual case insensitivity rants? In any ways, we need a way to give the files back for customers, which is only doable by the linear search, whether it sucks or not. :( _______________________________________________ Linux-f2fs-devel mailing list Linux-f2fs-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/linux-f2fs-devel 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 1EBB9171D2 for ; Mon, 6 Jan 2025 21:18:28 +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=1736198310; cv=none; b=gNTEzXigLzKx4Jp0VJoyxNE0Mx+imnyAyIunPzwaLsblqTpdSjVjvMtv/vC6Fjf0PxFLFkIWBXKaH8b8JhuNoT1+lcEt26yHO6eFmrSjF4ErQQ3nKPlBh2M2xZEsPu9/rZF6GdbWoDsh0DrrjB0cKWG2Fdy/or1Urw6QMQQjh2U= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1736198310; c=relaxed/simple; bh=R8cjwFD4KkgYdBXkteN978ebXomInOYBCFtzyQpNdiU=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=p32iwCRrqKkD+teAR9BB4skzNHO1eb3oJadMbOnPQ3ibhYBron5USzubBgF+C8B/CrW1d6CnuLo+w7Pbgp5TfQQYbuWfzBEqdiivhfeyPY3S9iHCyWhf/a1DC5wjfFKD1JwhETaD2xX6jIWUHsG6mApa3gXyL42eVjz34GVamrw= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=gmTr9apR; 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="gmTr9apR" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 3B983C4CED2; Mon, 6 Jan 2025 21:18:28 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1736198308; bh=R8cjwFD4KkgYdBXkteN978ebXomInOYBCFtzyQpNdiU=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=gmTr9apRd/Xr1QBsyBE4q/yWG0J2R62jCvv08VLmeu2nTLPL8NxI612nl1Jc/xGxj CHAxCy9PoNraVP3dVeOB8+pAXI0gnGstNX9tM+Yr3Ie+IMt16ng1+422FNyaO4o5U8 MhyUfucKcxa6PXANtygz6AvAwyoyPe54/cghMlg8Msu0K0nSh+fh1v/60pu4FADHzD qgn+yzXRgIzi6Ry0mQxixx1mPbD1BNt74JlFQBvZTJYJSCAzlsU0ediB7ArZn+dksJ BueXA3DDMgr9jGUFugu01/v2lIN5FzCoRdfoYAjmfU1Hf3HkR2ckceppeIa46HXe2Y 8sLBfm820iqDA== Date: Mon, 6 Jan 2025 21:18:26 +0000 From: Jaegeuk Kim To: Christoph Hellwig Cc: Daniel Lee , Chao Yu , linux-f2fs-devel@lists.sourceforge.net, linux-kernel@vger.kernel.org Subject: Re: [PATCH v2] f2fs: Introduce linear search for dentries Message-ID: References: <20241220172136.1028811-1-chullee@google.com> Precedence: bulk X-Mailing-List: linux-kernel@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: On 01/03, Christoph Hellwig wrote: > On Mon, Dec 23, 2024 at 04:57:35PM +0000, Jaegeuk Kim wrote: > > > That means you have really bad worst case behavior for negative lookups. > > > I don' think this is in any way a good idea. > > > > No surprise. Please check: > > https://lore.kernel.org/lkml/Z1mzu4Eg6CPURra3@google.com/ > > Well, I think Linus finally gave in to revert the offending commit > after the usual case insensitivity rants? In any ways, we need a way to give the files back for customers, which is only doable by the linear search, whether it sucks or not. :(