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 X-Spam-Level: X-Spam-Status: No, score=-2.3 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_PASS,USER_AGENT_MUTT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 0BF6BC0044B for ; Thu, 8 Nov 2018 22:20:15 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id C75F620892 for ; Thu, 8 Nov 2018 22:20:14 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (1024-bit key) header.d=thunk.org header.i=@thunk.org header.b="LpUlIYwt" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org C75F620892 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=mit.edu Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731645AbeKIH5r (ORCPT ); Fri, 9 Nov 2018 02:57:47 -0500 Received: from imap.thunk.org ([74.207.234.97]:57216 "EHLO imap.thunk.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728473AbeKIH5q (ORCPT ); Fri, 9 Nov 2018 02:57:46 -0500 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=thunk.org; s=ef5046eb; 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=XKH6YiJaZqayXgHcy/bwtS0zJABlCqn/xMsfief3KdM=; b=LpUlIYwt2wPbxDmXOGTBYrVfOa 2cfeAOQCByN5E15+/j5yVYt7uSjJ32BjEYQBZP5P2bh9gCMVbS0sKLifuma2Op9BLkd3mQWPBmrCO M8paFG3rXdEiw7qlveUjyzqtUTai377FZoshANBaHHTvcoDU0K6Bjz8dEE2h7OPK9BnA=; Received: from root (helo=callcc.thunk.org) by imap.thunk.org with local-esmtp (Exim 4.89) (envelope-from ) id 1gKseS-0002Wq-M2; Thu, 08 Nov 2018 22:19:48 +0000 Received: by callcc.thunk.org (Postfix, from userid 15806) id 90C2A7A7D24; Thu, 8 Nov 2018 17:19:47 -0500 (EST) Date: Thu, 8 Nov 2018 17:19:47 -0500 From: "Theodore Y. Ts'o" To: Greg KH Cc: Dan Williams , Peter Zijlstra , Ingo Molnar , Thomas Gleixner , Linux Kernel Mailing List , X86 ML , Paul McKenney , John Stultz , acme@redhat.com, frederic@kernel.org, Jonathan Corbet , Andy Lutomirski , Marc Zyngier , Daniel Lezcano , Dave Hansen , Ard Biesheuvel , Will Deacon , Mark Brown Subject: Re: [patch 2/2] Documentation/process: Add tip tree handbook Message-ID: <20181108221947.GJ1080@thunk.org> Mail-Followup-To: "Theodore Y. Ts'o" , Greg KH , Dan Williams , Peter Zijlstra , Ingo Molnar , Thomas Gleixner , Linux Kernel Mailing List , X86 ML , Paul McKenney , John Stultz , acme@redhat.com, frederic@kernel.org, Jonathan Corbet , Andy Lutomirski , Marc Zyngier , Daniel Lezcano , Dave Hansen , Ard Biesheuvel , Will Deacon , Mark Brown References: <20181107171010.421878737@linutronix.de> <20181107171149.165693799@linutronix.de> <20181108074012.GD20032@gmail.com> <20181108091251.GL9761@hirez.programming.kicks-ass.net> <20181108201425.GF1080@thunk.org> <20181108210449.GB22691@kroah.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20181108210449.GB22691@kroah.com> User-Agent: Mutt/1.10.1 (2018-07-13) X-SA-Exim-Connect-IP: X-SA-Exim-Mail-From: tytso@thunk.org X-SA-Exim-Scanned: No (on imap.thunk.org); SAEximRunCond expanded to false Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, Nov 08, 2018 at 01:04:49PM -0800, Greg KH wrote: > > (Also note that even with fast SSD's and/or everything in page cache, > > runnning "tag --contains " will take a good 3-4 seconds, and > > if the git packs are not in the page cache, and/or you're unfortunate > > enough to have your git trees on an HDD.... it's not pretty.) > > I recommend the "static cache" or whatever that thing is called, that > helps out a _LOT_ with stuff like this. For the kernel tree, which is > never rebased, it speeds up this so much. At the risk of asking a stupid question, which cache is this? I don't think it's the untrackedCache; is it the BitmapHashCache? Thanks, - Ted