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=-3.5 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,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 214A7C43441 for ; Thu, 8 Nov 2018 22:33:37 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id C399D2086C for ; Thu, 8 Nov 2018 22:33:36 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=kernel.org header.i=@kernel.org header.b="WlbdtrCr" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org C399D2086C Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=linuxfoundation.org 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 S1729998AbeKIILO (ORCPT ); Fri, 9 Nov 2018 03:11:14 -0500 Received: from mail.kernel.org ([198.145.29.99]:52882 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727203AbeKIILO (ORCPT ); Fri, 9 Nov 2018 03:11:14 -0500 Received: from localhost (unknown [208.72.13.198]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id A35FA20857; Thu, 8 Nov 2018 22:33:34 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1541716414; bh=kCYZwCqJkPdxnt5etTeQuXhyYihj0xiOK0Qlsn/PAic=; h=Date:From:To:Subject:References:In-Reply-To:From; b=WlbdtrCr066REe9EpERoiFz8blYIm2ZwDphnl6i3hvY2pcuPo8Z574dvRSrJqDgxJ q04kDWnhNw0lpCr9N/j04s7+d1cM+TiTEqyMkFkF1mWQhGnHvzOyPjuojJ9tLk9W7U tsQsR/fHgnJh7L7S0o85QkpR7MWexxSIBcalVrTM= Date: Thu, 8 Nov 2018 14:33:29 -0800 From: Greg KH To: "Theodore Y. Ts'o" , 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: <20181108223329.GA19357@kroah.com> 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> <20181108221947.GJ1080@thunk.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20181108221947.GJ1080@thunk.org> User-Agent: Mutt/1.10.1 (2018-07-13) 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 05:19:47PM -0500, Theodore Y. Ts'o wrote: > 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? It's the 'commitGraph', here's the article I was trying to remember I learned this from: https://blogs.msdn.microsoft.com/devops/2018/06/25/supercharging-the-git-commit-graph/ greg k-h