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 6CA1C4B203C for ; Mon, 31 Aug 2026 15:51:47 +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=1788191507; cv=none; b=VGTCTO/WNimTSoPrx3gnKAvIoM8Y7xHCkeDLLLP/I67aGyQyIgxa67YcpkbpgcNJJt9Aet2ip29YPQ1Rfi4QmivYN5cPqA1uebVdECL/hEC+lJ7cXAfKZUEDJfJpaC+xMIB8TpFX/BJxs7e4tyjRJQQ0aXP7gU5JzPhwZeOYLD4= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788191507; c=relaxed/simple; bh=YWvMmPloiPAXbnv9J4/gjUmr5lyfPF72HyHHzTWZ/Vk=; h=From:To:Subject:Date:Message-ID:In-Reply-To:References: Content-Type:MIME-Version; b=DA1zoNJAYs2cxxFvOVS41nyCtr7CNjZk6EVajFwBYaU/biImWfkNFGE6yUnaaNcuZsOmMboCqVslLl2a/4nWmJU5/Z8h0Bg+/A4T2+ZgKJ6thvNc4Pf+EAX+/OTqT5uzO3vR1w2iKoqzZeV6nP3e6jaVEIm0/9IDL4oQ/LOzPG0= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=FLP95mZU; 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="FLP95mZU" Received: by smtp.kernel.org (Postfix) with ESMTPS id 2348CC2BCF4 for ; Mon, 31 Aug 2026 15:51:47 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1788191507; bh=YWvMmPloiPAXbnv9J4/gjUmr5lyfPF72HyHHzTWZ/Vk=; h=From:To:Subject:Date:In-Reply-To:References:From; b=FLP95mZU4paiR5R5BeBp2mNECHHkZpk3uFfPpJIzg3xZYCQhG1hkX+h/RmdyKl+4E 5MyNxWyKaApip0BNwwyP6pNqw/6ywGb+PESUwVjQ0quHH1JbWPjuNyHpjXVRbjW1DI AhXlAgmA5Wc/eJn5XZQolcnmYGJdKeg/sodEA0caZcKa2tlCAtiY1Ugbr6hnAVFv0l cDUIjk5v+irL4Qg+nwVNxLKhiZB8itatkxPsvf8DymW0slS8ECRZ+EI2ztkvn11PJB ugANHhSvkEmae9JkX2ErxyWtkDvMNYZfAmy8qdIUfTvDc8YZfTar/q37QuAHlgNKia vPhBdMPDjJO8Q== Received: by aws-us-west-2-korg-bugzilla-1.web.codeaurora.org (Postfix, from userid 48) id 13C09C41612; Mon, 31 Aug 2026 15:51:47 +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: Mon, 31 Aug 2026 15:51:46 +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: voltara@gmail.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 #35 from Andrew Skalski (voltara@gmail.com) --- (In reply to Micha=C5=82 Pecio from comment #34) > Makes sense, I only suggested the alternative placement to confirm that t= his > line is really the trigger and not merely a timing accident. I went back and double-checked the effect of different mdelay/msleep placements, and I no longer believe the xhci_read_64 call is involved. So I will need to do more building & testing to find out what's really happening= .=20 (Thankfully it will be much less time consuming now that I have my rebuild streamlined.) --=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.=