From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 1856D136F for ; Sat, 6 Jan 2024 02:11:25 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="C9GR+xn2" Received: by smtp.kernel.org (Postfix) with ESMTPS id E0674C433CC for ; Sat, 6 Jan 2024 02:11:24 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1704507084; bh=Ru1IUEaRGZ9F2yULdi/eWA2iyabHfDi5jb214dltm+o=; h=From:To:Subject:Date:In-Reply-To:References:From; b=C9GR+xn28PN8tuMMd0QIOSi/XV5CrTTOsWmWuBsJRMwqE1WgBXZeYwA8mz1Ez753n AGfwMUR5OeIfKnFHtZITVNkot6TEb5eeLrBdzKO5GndUtghvLc71dCQAMmgEiQ4V5R UOu3Q1wK6cUiDRuUDTacI+KQIGKhwyDCNqr9HDHwEOORVXVbUsXNeDoG3acPb0sXgE kKWR+qSkrjHYUrFr8cDpmnSEOxsA2qIHGf6h1i4zhVxywQi/q9/HZri7/rZ+6mE5Qy fEYLGT8Z9luDUVOWryPolVS26L5sJjvX7Bk4CWk9r4i5N/cXNZm/WGYotzB0o2Q7fW OEVICXtpPVfGA== Received: by aws-us-west-2-korg-bugzilla-1.web.codeaurora.org (Postfix, from userid 48) id C7C7AC53BD4; Sat, 6 Jan 2024 02:11:24 +0000 (UTC) From: bugzilla-daemon@kernel.org To: linux-ext4@vger.kernel.org Subject: [Bug 217965] ext4(?) regression since 6.5.0 on sata hdd Date: Sat, 06 Jan 2024 02:11:24 +0000 X-Bugzilla-Reason: None X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: AssignedTo fs_ext4@kernel-bugs.osdl.org X-Bugzilla-Product: File System X-Bugzilla-Component: ext4 X-Bugzilla-Version: 2.5 X-Bugzilla-Keywords: X-Bugzilla-Severity: normal X-Bugzilla-Who: matthew4196@gmail.com X-Bugzilla-Status: NEW X-Bugzilla-Resolution: X-Bugzilla-Priority: P3 X-Bugzilla-Assigned-To: fs_ext4@kernel-bugs.osdl.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://bugzilla.kernel.org/ Auto-Submitted: auto-generated Precedence: bulk X-Mailing-List: linux-ext4@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 https://bugzilla.kernel.org/show_bug.cgi?id=3D217965 --- Comment #63 from Matthew Stapleton (matthew4196@gmail.com) --- I can't seem to trigger the problem now even with all the patches disabled = and /sys/fs/ext4//mb_best_avail_max_trim_order set to the default of 3 so unfortunately I won't be able to help with this problem for now. According to perf record -ag sleep 5 at the moment most of the ext4 cpu usa= ge is in ext4_get_group_desc and ext4_get_group_info , both called from ext4_mb_prefetch and some usage in ext4_mb_good_group called from ext4_mb_find_good_group_avg_frag_lists . Both ext4_mb_prefetch and ext4_mb_find_good_group_avg_frag_lists were called from ext4_mb_regular_allocator. But this is all fairly low cpu usage at the mom= ent and it all stops shortly after the file operation is completed. --=20 You may reply to this email to add a comment. You are receiving this mail because: You are watching the assignee of the bug.=