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=-3.8 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, USER_AGENT_GIT autolearn=no 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 040E4C10DCE for ; Fri, 13 Mar 2020 21:12:26 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id BE4092074E for ; Fri, 13 Mar 2020 21:12:25 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=toxicpanda-com.20150623.gappssmtp.com header.i=@toxicpanda-com.20150623.gappssmtp.com header.b="Vbo7gPmv" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726838AbgCMVMZ (ORCPT ); Fri, 13 Mar 2020 17:12:25 -0400 Received: from mail-qv1-f53.google.com ([209.85.219.53]:36828 "EHLO mail-qv1-f53.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726777AbgCMVMY (ORCPT ); Fri, 13 Mar 2020 17:12:24 -0400 Received: by mail-qv1-f53.google.com with SMTP id r15so5432093qve.3 for ; Fri, 13 Mar 2020 14:12:24 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=toxicpanda-com.20150623.gappssmtp.com; s=20150623; h=from:to:subject:date:message-id:mime-version :content-transfer-encoding; bh=/XvooP7u4qYX26el2SXJGkajhh0j4ig1BaPQCSzZaPw=; b=Vbo7gPmvji7RJi0hdOFyz+XCVrqNAhyafwBXbWrVSjcHIniijHTqQ81yr12/TUngsf dw+35JdPOQMk2qk0Ng7M/PMijJ8j71Utf072sRlxX9id0W9LSAZRYtRRHFItOhQ3R5IG P2gSzU/pomK/Lnl6WzicLCG5oeyq2xpDF+lsxa9cTD2GwRaNVvGd/5ArR2krve5OYy7H v3fIiKeDVSk/w7wPRAkUXHVjJOrXJCgzQBZ7bWOr+tABLxPyiJfvcwYvNz7Ka34NN8NO DCdzDxWC1WvctHxjkS7ottvA1bpVVBbDS26o3rpLpKCLUNSgQv95NwGD/eEb7x1nq877 vXAg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:subject:date:message-id:mime-version :content-transfer-encoding; bh=/XvooP7u4qYX26el2SXJGkajhh0j4ig1BaPQCSzZaPw=; b=WXFdG8ZmYEv4ZjNKMyzrKC+meXgmxN4r/sVUV+msu59IidxtD5MfTOLItbjyVsiOz1 xDW1rLCai8k4Mx45psR9KruuqrK1TQX/j7amMc20zlLRpHXKPOQGfv6k5imHl1ls46+0 oyLZ+7tYg6ksUIhiMZbChpPHHh0MZTtv0st1cGupS9qfABecrE5q0Pn9fd6sYxoHFCY+ UlQrjeDt2mpCu2LTdlIVuVEHQYLVyxO7tSS0ruheQLKy102Gp56OYx0eGfPThVDOCC37 NvSYz5K3LTkFXOoA/Npz8DYfFeTZs1Rl3bxmjXjZ50505Vq8cWVo0TgFSScSPCo11uAo 9MSQ== X-Gm-Message-State: ANhLgQ384eL/VbCi8n1/OkJGvjt738VwzRrWIDsaIUmtVzdlO42EeOHm oHVYmQdl0p1sXvWOklv2/Bn69K0gF/tOsA== X-Google-Smtp-Source: ADFU+vu9hZRx3gNaqoER2xKEQYLfzbilQgu1SnJsy+wLzD8aHga4KiqB8cMQyuVb6jp94YvvoJ3Irg== X-Received: by 2002:a05:6214:9cd:: with SMTP id dp13mr2229858qvb.110.1584133943228; Fri, 13 Mar 2020 14:12:23 -0700 (PDT) Received: from localhost ([107.15.81.208]) by smtp.gmail.com with ESMTPSA id m19sm3792977qkk.1.2020.03.13.14.12.22 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 13 Mar 2020 14:12:22 -0700 (PDT) From: Josef Bacik To: linux-btrfs@vger.kernel.org, kernel-team@fb.com Subject: [PATCH 0/5] Fix up some stupid delayed ref flushing behaviors Date: Fri, 13 Mar 2020 17:12:15 -0400 Message-Id: <20200313211220.148772-1-josef@toxicpanda.com> X-Mailer: git-send-email 2.24.1 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-btrfs-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-btrfs@vger.kernel.org While debugging Zygo's delayed ref problems it was clear there were a bunch of cases that we're running delayed refs when we don't need to be, and they result in a lot of weird latencies. Each patch has their individual explanations. But the gist of it is we run delayed refs in a lot of arbitrary ways that have just accumulated throughout the years, so clean up all of these so we can have more consistent performance. Thanks, Josef