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 0D3B223B63E for ; Tue, 24 Feb 2026 10:19:34 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1771928375; cv=none; b=QdlejikzydkZZDv89M1yFaxd7KYyCvNyT6L+mKKOqjfPcOCYXisb6mJkKHRiyKdDuBEprOdl8n6xVuqw+J1uVmsP9mjVxK+EFCWVaJSBzQkkxvfA/GlmsWke9EhUG8vdGxV/HUFrfAcyx7ICdBjSdA/jswCLRwU6wA9RLhKc28E= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1771928375; c=relaxed/simple; bh=6LGpvOxc7fvhKYqGw9IrFZH48idVZlTaZrNp4/smXlk=; h=From:To:Subject:Date:Message-ID:In-Reply-To:References: Content-Type:MIME-Version; b=sCyo3kfOgy2h/x1Fg3CePg1VhE6JpY0p9X6X6uofMM71ms67Fq1grms5nuUfpSTM3nasgcQCOJbfqokQZEut4I6jaSXJb+KrNdvuzajkXGWmBZz4jjyf9/ChfMdnhZtryJHJqCZy77TOSIfmrsxg49zdwXoVeec1sZUjeqUeo38= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=GUk+7uCx; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="GUk+7uCx" Received: by smtp.kernel.org (Postfix) with ESMTPS id 8662CC19424 for ; Tue, 24 Feb 2026 10:19:34 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1771928374; bh=6LGpvOxc7fvhKYqGw9IrFZH48idVZlTaZrNp4/smXlk=; h=From:To:Subject:Date:In-Reply-To:References:From; b=GUk+7uCxCwT+NurmnwT9Tof372QLLfGSt5ZpET3mLAd337XGIHOj0tjynWnWEfUk7 XD62MzWHZVCVUvEdBuIakAxP1v6xAgFkJKONjno/LjpU9nsX42bYt83ZbDxN9IdU3L aAtisCdLyJRPT8QXIkb3z6YpoKeXhz/ZkixxGGv65UePv6MOVIqxFDsBlwR0XoVebA WeQ+XrXSljVMY4ZZGytxDWJ5OClhZzszBUasuQ0hYAQb/WONK1MgwG8zT0yeb6Kgwi Eqr2IMpxw5DBU2dK3lW2mg39eBVYQU8+bdkdMcEgdqV8JPMIMuv4FNDXm3j90gJdhL +u/rnO8DAZdQg== Received: by aws-us-west-2-korg-bugzilla-1.web.codeaurora.org (Postfix, from userid 48) id 75C3CC41614; Tue, 24 Feb 2026 10:19:34 +0000 (UTC) From: bugzilla-daemon@kernel.org To: linux-usb@vger.kernel.org Subject: [Bug 221103] xhci_hcd: System lockup under CPU load during usbfs polling of USB devices on AMD platforms Date: Tue, 24 Feb 2026 10:19:34 +0000 X-Bugzilla-Reason: None X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: AssignedTo drivers_usb@kernel-bugs.kernel.org X-Bugzilla-Product: Drivers X-Bugzilla-Component: USB X-Bugzilla-Version: 2.5 X-Bugzilla-Keywords: X-Bugzilla-Severity: normal X-Bugzilla-Who: paul@unnservice.com X-Bugzilla-Status: NEW X-Bugzilla-Resolution: X-Bugzilla-Priority: P3 X-Bugzilla-Assigned-To: drivers_usb@kernel-bugs.kernel.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-usb@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 https://bugzilla.kernel.org/show_bug.cgi?id=3D221103 --- Comment #21 from Paul Alesius (paul@unnservice.com) --- (In reply to Micha=C5=82 Pecio from comment #20) No, I have never seen "Controller not ready at resume -19", "PCI post-resume error -19!", or "HC died; cleaning up" in my weeks of logs without the enti= re system freezing, after days of hammering the USB devices to diagnose the freeze. I ran a test holding one usbfs fd open on /dev/bus/usb/010/001 (`exec 3< /dev/bus/usb/010/001`) while rapidly cycling power/control between 'auto' a= nd 'on' on 0000:7a:00.4. After the initial resume triggered by opening the fd, there were no further suspend/resume messages at all in netconsole (the dev= ice stayed powered on and the system remained stable with no further messages o= ver netconsole during hammering of control=3Don/auto with a 0.2s delay, with fu= ll dynamic debug enabled xhci_hcd +p, usbcore +p, pci +p, printk=3D8) The "HC died" messages have only ever shown up in netconsole right at the moment of a full system lockup, and only during tests that *repeatedly open= and close* the usbfs root-hub file, and during the HC-dead cleanup path. Let me know if you want me to test a patch or run any other specific test. --=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.=