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=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_PASS,USER_AGENT_MUTT autolearn=unavailable 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 62E50C67863 for ; Tue, 23 Oct 2018 11:19:25 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 2904D2075D for ; Tue, 23 Oct 2018 11:19:25 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 2904D2075D Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=suse.cz Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-btrfs-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728180AbeJWTmV (ORCPT ); Tue, 23 Oct 2018 15:42:21 -0400 Received: from mx2.suse.de ([195.135.220.15]:52192 "EHLO mx1.suse.de" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1727568AbeJWTmV (ORCPT ); Tue, 23 Oct 2018 15:42:21 -0400 X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay2.suse.de (unknown [195.135.220.254]) by mx1.suse.de (Postfix) with ESMTP id CE303AF43; Tue, 23 Oct 2018 11:19:18 +0000 (UTC) Received: by ds.suse.cz (Postfix, from userid 10065) id 75EBEDA6FB; Tue, 23 Oct 2018 13:19:10 +0200 (CEST) Date: Tue, 23 Oct 2018 13:19:10 +0200 From: David Sterba To: Liu Bo Cc: Chris Mason , torvalds@linux-foundation.org, linux-btrfs@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [GIT PULL] Btrfs updates for 4.20, part 1 Message-ID: <20181023111910.GO16290@suse.cz> Reply-To: dsterba@suse.cz Mail-Followup-To: dsterba@suse.cz, Liu Bo , Chris Mason , torvalds@linux-foundation.org, linux-btrfs@vger.kernel.org, linux-kernel@vger.kernel.org References: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.23.1 (2014-03-12) Sender: linux-btrfs-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-btrfs@vger.kernel.org On Mon, Oct 22, 2018 at 05:23:36PM -0700, Liu Bo wrote: > > Performance improvements: > > > > * blocking mode of path is gone, means that only the spinning mode is used; > > I'd like to do a few corrections here, the transition from the > spinning mode to blocking mode is removed, we still need blocking mode > of path for sleeping context. Ok, thanks. So for the purpose of merge changelog, the updated text: * transition between blocking and spinning modes of path is gone, which originally resulted to more unnecessary wakeups and updates to the path locks, the effects are measurable and improve latency and scalability