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 X-Spam-Level: X-Spam-Status: No, score=-4.2 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 7D3D9C433DB for ; Mon, 8 Mar 2021 10:47:07 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 57617651A5 for ; Mon, 8 Mar 2021 10:47:07 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230495AbhCHKqg (ORCPT ); Mon, 8 Mar 2021 05:46:36 -0500 Received: from mail.kernel.org ([198.145.29.99]:40950 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230299AbhCHKqL (ORCPT ); Mon, 8 Mar 2021 05:46:11 -0500 Received: by mail.kernel.org (Postfix) with ESMTPS id 581F965203 for ; Mon, 8 Mar 2021 10:46:11 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1615200371; bh=tb70iTu2usueSPChTzC8zlB6gCTr3FZcZENdwUY2oCc=; h=From:To:Subject:Date:In-Reply-To:References:From; b=NTDqvk1k02DQZx9mnkaJVGbYdHqUOOe1VEoR7+rtAn4r1MpqP4qCRXQ0DzA2NxnWj POYcOb0UaJ8a54GaN/z0aNwvybcwj7a/ma//xcjWrwi2EmRa08ETIuM07/RAnjsZ6o 4Cjii8IA09rBc88RIfHpTwmNgAZ4TUINxefeY+1jCZl/4E/s7d/zZEunLtc9RJN3rx OtPJVg9WMJU2jnVWF7MHVFDmrlTwt7FtokwlMwWG7BfcyiDiY8LEYEMYYP7yNB9V8F 4QS5VV6IoJy6zEAI3/t7JOskN28ATu6s32GT/0nXYq4xMOTY1+ANVTAXxB7kuOCoIu O6ogqA6wQNfPg== From: bugzilla-daemon@bugzilla.kernel.org To: kvm@vger.kernel.org Subject: [Bug 201753] AMD-Vi: Unable to write to IOMMU perf counter Date: Mon, 08 Mar 2021 10:46:10 +0000 X-Bugzilla-Reason: None X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: AssignedTo virtualization_kvm@kernel-bugs.osdl.org X-Bugzilla-Product: Virtualization X-Bugzilla-Component: kvm X-Bugzilla-Version: unspecified X-Bugzilla-Keywords: X-Bugzilla-Severity: normal X-Bugzilla-Who: david.coe@live.co.uk X-Bugzilla-Status: NEW X-Bugzilla-Resolution: X-Bugzilla-Priority: P1 X-Bugzilla-Assigned-To: virtualization_kvm@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 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org https://bugzilla.kernel.org/show_bug.cgi?id=3D201753 --- Comment #21 from David Coe (david.coe@live.co.uk) --- Good morning, Suravee! One (final?!) test of your patch (with increased retry count and logging) on the latest git kernel (5.10.0-rc2) all on Ryzen 2400G. In summary: 5.8.0-44 (Ubuntu 20.10) 6 trys 20 msecs 5.10.0-14 (Ubuntu 21.04) 5 trys 20 msecs 5.12.0-rc2 (raw git) 6 trys 20 msecs AFAIK you are AMD's go-to guru for open-source people and an IOMMU expert. = It's your patch that is now both in the kernel commit and (I hope) in Ubuntu's t= o-do list. Could I ask if you could patch-the-patch (if there is no esoteric technical downside) to increase the number of retrys? Maybe if Paul would g= ive it another shot with his Ryzen 2200G with a larger maximum count and his logging :-). Best regards and our thanks David --=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.=