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 42F56C433F5 for ; Tue, 23 Nov 2021 02:44:59 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232741AbhKWCsF (ORCPT ); Mon, 22 Nov 2021 21:48:05 -0500 Received: from mail.kernel.org ([198.145.29.99]:36376 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229672AbhKWCsF (ORCPT ); Mon, 22 Nov 2021 21:48:05 -0500 Received: by mail.kernel.org (Postfix) with ESMTPS id F23AA60E73 for ; Tue, 23 Nov 2021 02:44:57 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1637635498; bh=pf6FiAPAY6YPiiHbvfmQIgZkkdkx/lAE0wbHDFHVTlw=; h=From:To:Subject:Date:In-Reply-To:References:From; b=YzsnNKBM+i7k2HMJjF+J9eEBhHNOdRrxgKtdf02lr6+fhV8W8CcLBOKNW3nrhlHz7 Hk9INPOrVY6W+kYfd7bpovowQFDf8dS2w2PIh3y2OB07fPEPpRdXcCpfkG/qpcFCtd OXQ51azYGG8wyoTKyniKhZseOGiz3M2WrNTySqt1RUuEQqvjj49Z1B7jvju1doZ1+7 X2WOGkyeO8rlFWSm1JT5Ij6aC+jX0jxz5tgTdjbqBWIlBI9gvluVV/cex6aCQoHRxG mEhDaXJ8uqPIo2GV4Ndv3FeNlo6pvaum3SowYrzPa2AThFaXnNt27UUhCDZOtnVZBH kO4BYCzdOwVTw== Received: by pdx-korg-bugzilla-2.web.codeaurora.org (Postfix, from userid 48) id D9C1C60F11; Tue, 23 Nov 2021 02:44:57 +0000 (UTC) From: bugzilla-daemon@bugzilla.kernel.org To: linux-usb@vger.kernel.org Subject: [Bug 215095] USB ehci error -110 and soft lockup on kernel 5.15.4 as kvm guest Date: Tue, 23 Nov 2021 02:44:57 +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: stern@rowland.harvard.edu X-Bugzilla-Status: NEW X-Bugzilla-Resolution: X-Bugzilla-Priority: P1 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 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org https://bugzilla.kernel.org/show_bug.cgi?id=3D215095 --- Comment #5 from Alan Stern (stern@rowland.harvard.edu) --- Here's something you can do to help diagnose the soft lockup. When the loc= kup occurs, go to the /sys/kernel/debug/usb/ehci/* directory (fill in the "*" w= ith the pathname for the EHCI controller that's locking up), make copies of the files you find there, and attach those copies to this bug report. Another thing you can do: Before the problem occurs, start a process doing cat /sys/kernel/debug/usb/usbmon/1u >mon.out and after the lockup happens, kill the "cat" process. Then attach the mon.= out file to the bug report. There may be additional debugging options available in kvm, but I don't know what they are. --=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.=