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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 6F0E8EC8748 for ; Fri, 8 Sep 2023 12:02:43 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S241645AbjIHMCp (ORCPT ); Fri, 8 Sep 2023 08:02:45 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:54520 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232403AbjIHMCo (ORCPT ); Fri, 8 Sep 2023 08:02:44 -0400 X-Greylist: delayed 470 seconds by postgrey-1.37 at lindbergh.monkeyblade.net; Fri, 08 Sep 2023 05:02:40 PDT Received: from mail.lichtvoll.de (luna.lichtvoll.de [194.150.191.11]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id A587C1BE7 for ; Fri, 8 Sep 2023 05:02:40 -0700 (PDT) Received: from 127.0.0.1 (localhost [127.0.0.1]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (secp384r1) server-digest SHA384) (No client certificate requested) by mail.lichtvoll.de (Postfix) with ESMTPSA id 510DA7A0B17; Fri, 8 Sep 2023 13:54:48 +0200 (CEST) Authentication-Results: mail.lichtvoll.de; auth=pass smtp.auth=martin smtp.mailfrom=martin@lichtvoll.de From: Martin Steigerwald To: linux-btrfs@vger.kernel.org, Linux regressions mailing list , Linux kernel regressions list Cc: Qu Wenruo , Tim Cuthbertson Subject: Re: Scrub of my nvme SSD has slowed by about 2/3 Date: Fri, 08 Sep 2023 13:54:47 +0200 Message-ID: <2169630.irdbgypaU6@lichtvoll.de> In-Reply-To: References: <1d611dbb-8aee-9a6e-701c-6498f1b51c34@leemhuis.info> MIME-Version: 1.0 Content-Transfer-Encoding: 7Bit Content-Type: text/plain; charset="us-ascii" Precedence: bulk List-ID: X-Mailing-List: linux-btrfs@vger.kernel.org Hi Thorsten, Qu, Tim, everyone, Linux regression tracking #update (Thorsten Leemhuis) - 29.08.23, 14:17:33 CEST: > On 12.07.23 13:02, Linux regression tracking #adding (Thorsten Leemhuis) > wrote: > > On 03.07.23 22:19, Tim Cuthbertson wrote: > >> Yesterday, I noticed that a scrub of my main system filesystem has > >> slowed from about 2.9 gb/sec to about 949 mb/sec. My scrub used to > >> run > >> in about 12 seconds, now it is taking 51 seconds. I had just > >> installed > >> Linux kernel 6.4.1 on Arch Linux, upgrading from 6.3.9. At first I > >> suspected the new kernel, but now I am not so sure. > > > > Thanks for the report. It seems it will take some work to address > > this, > > so to be sure the issue doesn't fall through the cracks unnoticed, I'm > > adding it to regzbot, the Linux kernel regression tracking bot: > > > > #regzbot ^introduced e02ee89baa66 > > #regzbot resolve: various changes merged for 6.6 improve things again; > more planned; backporting is planned, too; > #regzbot ignore-activity > > (yes, that is not idea, but that's how it is sometimes) ideal? Scrubbing "/home" with 304.61GiB (interestingly both back then with 6.4 and now with 6.5.2): - 6.4: 966.84MiB/s - 6.5.2: 748.02MiB/s I expected an improvement. Same Lenovo ThinkPad T14 AMD Gen 1 with AMD Ryzen 7 PRO 4750U, 32 GiB RAM and 2TB Samsung 980 Pro NVME SSD as before. Ciao, -- Martin