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 kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by smtp.lore.kernel.org (Postfix) with ESMTP id 9B160CDB483 for ; Wed, 18 Oct 2023 11:12:43 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id ED49A8D014E; Wed, 18 Oct 2023 07:12:42 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id E83AF8D0016; Wed, 18 Oct 2023 07:12:42 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id D721C8D014E; Wed, 18 Oct 2023 07:12:42 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0010.hostedemail.com [216.40.44.10]) by kanga.kvack.org (Postfix) with ESMTP id CB22C8D0016 for ; Wed, 18 Oct 2023 07:12:42 -0400 (EDT) Received: from smtpin30.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay03.hostedemail.com (Postfix) with ESMTP id 971E3A12A5 for ; Wed, 18 Oct 2023 11:12:42 +0000 (UTC) X-FDA: 81358319364.30.994DAA7 Received: from mail-lj1-f178.google.com (mail-lj1-f178.google.com [209.85.208.178]) by imf16.hostedemail.com (Postfix) with ESMTP id 79DEE180019 for ; Wed, 18 Oct 2023 11:12:40 +0000 (UTC) Authentication-Results: imf16.hostedemail.com; dkim=pass header.d=ionos.com header.s=google header.b=brt10yjM; dmarc=pass (policy=quarantine) header.from=ionos.com; spf=pass (imf16.hostedemail.com: domain of max.kellermann@ionos.com designates 209.85.208.178 as permitted sender) smtp.mailfrom=max.kellermann@ionos.com ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1697627560; h=from:from:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references:dkim-signature; bh=jDpHPJE+BkfTNRDkUeRRpPFsjN3yGYmtd1M6xO6lbDg=; b=hGd1p1fzJfZqtLTFivBEXhrfLBXbVrCNtMRVAbYUpb/g77+xAfOJIGbYdI0rWq53LThAM5 vQibsSfNMJfWQDSiMapnRb7qDoVe/hgv4W8hgc5hUd08TycZ+eCG0UKeS9kk6Sq/rAaGvX 1wcXzWg08Sd2lL12C4kRKgbkDg5SH0g= ARC-Authentication-Results: i=1; imf16.hostedemail.com; dkim=pass header.d=ionos.com header.s=google header.b=brt10yjM; dmarc=pass (policy=quarantine) header.from=ionos.com; spf=pass (imf16.hostedemail.com: domain of max.kellermann@ionos.com designates 209.85.208.178 as permitted sender) smtp.mailfrom=max.kellermann@ionos.com ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1697627560; a=rsa-sha256; cv=none; b=t2mBB8jYOFCgYtcNwm40btrYN2R2Djke6T6XuGnTlOc/vQ8o3dydlChoaEweBFEXhiP4LR 6TD3aO3FvBBsnFs+p1Cm0/KUTsGfIR/mmfVAeJfYKMRQVDJyQgXq2A1P6jP5kwKlIDCa93 Rst9te+UpjprQSCraUPNHGMCkouuc+o= Received: by mail-lj1-f178.google.com with SMTP id 38308e7fff4ca-2c514cbbe7eso56826021fa.1 for ; Wed, 18 Oct 2023 04:12:40 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ionos.com; s=google; t=1697627558; x=1698232358; darn=kvack.org; h=content-transfer-encoding:cc:to:subject:message-id:date:from :in-reply-to:references:mime-version:from:to:cc:subject:date :message-id:reply-to; bh=jDpHPJE+BkfTNRDkUeRRpPFsjN3yGYmtd1M6xO6lbDg=; b=brt10yjMmvt6y9Pwzzz+n80JICdrFkonZVwtHdEkwXhyB8cbo9fmFWYM3AnVjghHVk FgauV5JrErGgQ9F01979/7jdc8jYLvKy7XN6igOaPLT/Kq8Idxc8ptVKUAHAntgYddtl KHLQTtpvGOQmgfQfmv1B01fKxccbEBxa/1OEenge5lDs2t6si54zH8hDqbdJC6EO3Dkb zBNyHqbuosMrKqENjmHWvBs5hqGxkGgBQH5X8innjVBRgLT0kPb33gK4UDRgV82t0qmt wBsuQaJNClP16DiU5eK1yZhh2AorGYbs/UUSNwW5r8ZNzhmnn2oyCSXc0ydPzU42PLBD RfRw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1697627558; x=1698232358; h=content-transfer-encoding:cc:to:subject:message-id:date:from :in-reply-to:references:mime-version:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=jDpHPJE+BkfTNRDkUeRRpPFsjN3yGYmtd1M6xO6lbDg=; b=RrsRCQ4MiWIpcuLrnE6yvu8U8A4aiP2YQWoR9CZZkFBmdjccK1ljaZkUK4+CCdaobT nzJ75r6bvKg13FiwosJ5LyI9hltpKiuBDhKhX5pMGj7P+orr1eVSHEPkH34zDB2txSFU hUOJ4PYzE9E2EnuLO4llUuhpgziSwH2Gm7jTnSYpITXsAJY/Vpq4+r0IzR4niArsewnK HCmdWWuH7ENoSAXNkBT32dedK+9FJvRejTj8U7ROVYf6fyZTdoR20Y0FBPPD1eCkskUX jdfHvbCNjZ74YGZn4Y554MInORDHlEREamC7bfkUxkRIv2ZtykSOqbZI6nWmUd+yU/nJ LUug== X-Gm-Message-State: AOJu0YwyAjz/yqYLHXNKNqBhNlVVHdwt5d4h2xVlXRJAXfBIXJFX29RR caRdfN/82A/BJfI4diBpAVYvrKhYXlaAXh3KzEjYIQ== X-Google-Smtp-Source: AGHT+IEcadxu+rrzOiZNQ2yTDTNJ9ADljxG38fepzRX4LyaanMpNj7OlpP3Lkss3jCyK8vf54Bo72NjI3VENeLXhh0Y= X-Received: by 2002:a05:651c:503:b0:2c0:c6a:d477 with SMTP id o3-20020a05651c050300b002c00c6ad477mr4822094ljp.18.1697627558665; Wed, 18 Oct 2023 04:12:38 -0700 (PDT) MIME-Version: 1.0 References: <202310172247.b9959bd4-oliver.sang@intel.com> In-Reply-To: From: Max Kellermann Date: Wed, 18 Oct 2023 13:12:27 +0200 Message-ID: Subject: Re: [linux-next:master] [drivers/char/mem] 1b057bd800: stress-ng.splice.ops_per_sec -99.8% regression To: kernel test robot Cc: oe-lkp@lists.linux.dev, lkp@intel.com, Linux Memory Management List , Greg Kroah-Hartman , linux-kernel@vger.kernel.org, ying.huang@intel.com, feng.tang@intel.com, fengwei.yin@intel.com Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Rspamd-Queue-Id: 79DEE180019 X-Rspam-User: X-Rspamd-Server: rspam04 X-Stat-Signature: r9nejqcammjteuwkdazcgugrirdcnpwh X-HE-Tag: 1697627560-938180 X-HE-Meta: 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 52gJJjrV NfimaQKbZEXE9ghOmYSZ9kL2JyNKDFOgkD5fhKfcjRpD71YoBXuxcs+Y7r5aGMzZXfMKdmHlO6kJwrlXhYWzIrsuno9m2FX+Ud70W+CWgL6el57hyUrOr3Kyutt5o3Orb6OJMEaXbCWipMKEuPT5uEPtoe0VLaMwbY33W5RmXKXyy4Zr5wyH8hKHXKSFYBlFqJiTHU9N2tnJKPTJ48dNGO7qQUZljYcKqiLATGZU6Nfm96aTvOTRiqgoA/dU/AGfm2ZL4sOzYN6mdYxj73P1CXq0tqofpL4Hfdx5dLXZfK50skBYIWP3q6dKeSAreP4boHIVkJ12JP+8vBOhJy8mENVFAZm+Sx/CFv6fN4I8oPhW84srMa8pIVI3IBw== X-Bogosity: Ham, tests=bogofilter, spamicity=0.000034, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: On Wed, Oct 18, 2023 at 12:21=E2=80=AFPM Max Kellermann wrote: > I think this might be caused by a bug in stress-ng, leading to > blocking pipe writes. Just in case I happen to be right, I've submitted a PR for stress-ng: https://github.com/ColinIanKing/stress-ng/pull/326