From nobody Wed Feb 21 13:20:39 2024 X-Original-To: fs@mlmmj.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mlmmj.nyi.freebsd.org (Postfix) with ESMTP id 4TfxjQ0ZFTz5C9r8 for ; Wed, 21 Feb 2024 13:20:42 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from mxrelay.nyi.freebsd.org (mxrelay.nyi.freebsd.org [IPv6:2610:1c1:1:606c::19:3]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256 client-signature RSA-PSS (4096 bits) client-digest SHA256) (Client CN "mxrelay.nyi.freebsd.org", Issuer "R3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 4TfxjP6dSkz4YDV for ; Wed, 21 Feb 2024 13:20:41 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=freebsd.org; s=dkim; t=1708521641; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=tO4dOkVVOGbmIbAkqpGhldb582btbMf7CEqHaoSCU+w=; b=WYlp4I8HiPq58wmUR+WPs0TvOQjvPSJJtDYUhPyNXKAYNlcGkk6be8wi9lhyA/oD/usyST tL7ev3NvHjrjioXTuzZaGJeu3neUGZtKAy50bxSA6u8UcIIN38kU3fMF1mig6JNxTJYK9v WfoWEKQojeraCVRDlgpDWXAVvs2YE057snp6t0VW9NkYK6qdGKSKxeI7nCSsYHSmwU22Of 6rmM7ewaQcGbIHhjzzuEut367+EAq0ufOm/W3vh2ft7I4oWW2VG1Ln8a4cAJWviPXLFC0Z 3a++zqj8+a3xR9dJHSauRMFcpWajACEfsrfqjTGEwhOGu5vxjRbl2TRK9zIbKw== ARC-Authentication-Results: i=1; mx1.freebsd.org; none ARC-Seal: i=1; s=dkim; d=freebsd.org; t=1708521641; a=rsa-sha256; cv=none; b=D5h2JqpGbdYeZMdNUEG60PiL4sNpLO4WpKMVJ+lxon18QaEYOYJ/qFuIW0bwRetwAExZv9 IXwXRyoCYUUR5xjoA6i3NCtcs0TG5dU+hk2KyYLemunkWHHVlxVDyXyfQJCX3E5QGFkYfE 7Y+lMWj3tHR27NjbogQF0YE899ka9idNmtEteq/o/LYrPbKUIU0xJbuSIeOoj/AYnLHA79 JPUtnSwm56uEVQuu8g+7BwjjLDnh8MxumAq5hzXzu+0MlJBZ3rWebtJCeRvWyJ7x46urzR iJN94HBH/v5HFSNGrwAiNyOGUuxHSMtUHSH8oeDG9wDFGbIh7d43no8LCLb22g== Received: from kenobi.freebsd.org (kenobi.freebsd.org [IPv6:2610:1c1:1:606c::50:1d]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (Client did not present a certificate) by mxrelay.nyi.freebsd.org (Postfix) with ESMTPS id 4TfxjP5hcLz13RY for ; Wed, 21 Feb 2024 13:20:41 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from kenobi.freebsd.org ([127.0.1.5]) by kenobi.freebsd.org (8.15.2/8.15.2) with ESMTP id 41LDKfIu070116 for ; Wed, 21 Feb 2024 13:20:41 GMT (envelope-from bugzilla-noreply@freebsd.org) Received: (from www@localhost) by kenobi.freebsd.org (8.15.2/8.15.2/Submit) id 41LDKfpK070115 for fs@FreeBSD.org; Wed, 21 Feb 2024 13:20:41 GMT (envelope-from bugzilla-noreply@freebsd.org) X-Authentication-Warning: kenobi.freebsd.org: www set sender to bugzilla-noreply@freebsd.org using -f From: bugzilla-noreply@freebsd.org To: fs@FreeBSD.org Subject: [Bug 275594] High CPU usage by arc_prune; analysis and fix Date: Wed, 21 Feb 2024 13:20:39 +0000 X-Bugzilla-Reason: AssignedTo X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: Base System X-Bugzilla-Component: kern X-Bugzilla-Version: 14.0-RELEASE X-Bugzilla-Keywords: X-Bugzilla-Severity: Affects Some People X-Bugzilla-Who: pmc@citylink.dinoex.sub.org X-Bugzilla-Status: Open X-Bugzilla-Resolution: X-Bugzilla-Priority: --- X-Bugzilla-Assigned-To: fs@FreeBSD.org X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: Message-ID: In-Reply-To: References: Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Bugzilla-URL: https://bugs.freebsd.org/bugzilla/ Auto-Submitted: auto-generated List-Id: Filesystems List-Archive: https://lists.freebsd.org/archives/freebsd-fs List-Help: List-Post: List-Subscribe: List-Unsubscribe: Sender: owner-freebsd-fs@freebsd.org MIME-Version: 1.0 https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D275594 --- Comment #66 from Peter Much --- (In reply to Seigo Tanimura from comment #64) They are from the official distribution 6c2137593990 (plus local fixes): FreeBSD disp.***** 13.3-BETA1 FreeBSD 13.3-BETA1[0d65a8c79a4a=3D6c213759399= 0+27] D6R13V1 amd64 This installation comes from a deploy engine, we're usually not building locally. (To build locally means to start a test case, and to do so I must first get= rid of my currently open test case, otherwise I do no longer know what exactly = was changed where. This is why things proceed slowly here - I usually do root c= ause analysis.) I am mainly worried about the endless loop. An endless loop in kernel thread MUST NOT happen (for whatever reason), because it cannot be contained with rctl(8); it will keep cpu at max and may bring thermal load steering into disarray. --=20 You are receiving this mail because: You are the assignee for the bug.=