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=-0.8 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS 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 970C5C43603 for ; Wed, 11 Dec 2019 04:17:04 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 6E0902077B for ; Wed, 11 Dec 2019 04:17:04 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=colorremedies-com.20150623.gappssmtp.com header.i=@colorremedies-com.20150623.gappssmtp.com header.b="GVzEL5Eq" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726879AbfLKERB (ORCPT ); Tue, 10 Dec 2019 23:17:01 -0500 Received: from mail-wr1-f67.google.com ([209.85.221.67]:46033 "EHLO mail-wr1-f67.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726631AbfLKERB (ORCPT ); Tue, 10 Dec 2019 23:17:01 -0500 Received: by mail-wr1-f67.google.com with SMTP id j42so22415347wrj.12 for ; Tue, 10 Dec 2019 20:16:58 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=colorremedies-com.20150623.gappssmtp.com; s=20150623; h=mime-version:references:in-reply-to:from:date:message-id:subject:to; bh=PQ5rQ3wik2ixjrnLCweqtH51YItg+G/tGkSEH/Bd+Yo=; b=GVzEL5EqPxao4ATXBC1uVCO2PZIvALYAVuqVMLM6V+m5cuD8kvlemT76jeSoYoCDHT dpRTFFiRSzCcgUHReyhfNcZDnp3KFmgfpa4l+/z0pFX9Ck4DLsx5Br7HOegBp41QZWYz 3pE8gqCV8V4g14+3KFP1sK9L53UxAzrwCflAv9VtxPQWOCeM1Kl+MxFfnijJRupWtPmD EF9aG86Vk/Nlughme+BmHSaLZnYAxA/0BxBPLBmdXR5QI4h+rH9F+w0d3zFn94hTkAPt VNfJiMDfe/wMl4wDIGx+I8GV6OKwQTTcF3Oi1nGfhJXmMQS204j81yXGK/C4tmYDO2nx 6E+w== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to; bh=PQ5rQ3wik2ixjrnLCweqtH51YItg+G/tGkSEH/Bd+Yo=; b=SlAOaifX6DFrBk8XSc9p2CrX0It9bZwM0kpKSmYf/S5zjoWU5mdzpqymaonMTzm+9J xbsbIBo7mo/OXgigjVJqrf5V16HeQ/IjxakoJOwZ1Ynxg7P83qDodLnPJSDEHCyVMOIY UogdEcFr4k+Zd4OReRn28JXWvQCLxrDoLt/n6gHq5AMDGMVGGoLMD5bA3V5YHoJ/oF/N wgpLZj1ay25ehSm2eNYf964v7gx5tuiShx8Bvol3dZe3iku+KJLpas6Dq1Cv1fjp6cEB 2QxfxG28KJN9xrCB2MCtiXXqhTZQ9XD5NPOUrBnpPWOQjYQJz8i4NpRSFtuHvT0rUTwq Geyg== X-Gm-Message-State: APjAAAWjh+rdm59Wql/fq6JnXScIInohe1dVvvbDo4UfZS6/SfE1TLAu EwAL3k9bMDGfqcs8zjmZVp3nzrjbPAvXZtj0epOIcmP5snk= X-Google-Smtp-Source: APXvYqwl6qFn1LVxKBJzKSwhIs7tv8ZzsrrES/IkSkJvGkgvu8ob4nnFpE1dLC5qRAZ2qqo5uc5n8QHPUULTf4uJ6cQ= X-Received: by 2002:adf:f6c8:: with SMTP id y8mr1105457wrp.167.1576037818100; Tue, 10 Dec 2019 20:16:58 -0800 (PST) MIME-Version: 1.0 References: In-Reply-To: From: Chris Murphy Date: Tue, 10 Dec 2019 21:16:42 -0700 Message-ID: Subject: Re: 5.5.0-0.rc1 hang, could be zstd compression related To: Btrfs BTRFS , Linux FS Devel , Qu Wenruo , David Sterba Content-Type: text/plain; charset="UTF-8" Sender: linux-fsdevel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-fsdevel@vger.kernel.org OK this is interesting. It took 7 hours to hit it the first time. And the consistent reproducer I've now run into twice, is 'dnf install' any little rpm, which is what I was doing the first time I hit it. I'm not sure what about dnf or rpm is triggering this, I've got other things doing a bunch of small file writes including Firefox - yet those don't trigger it. Next, I tried a couple more times with compression disabled, and the problem doesn't happen. So it does seem zstd related. Maybe. Chris Murphy