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 38859C433F5 for ; Tue, 11 Jan 2022 08:29:04 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1348917AbiAKI3D (ORCPT ); Tue, 11 Jan 2022 03:29:03 -0500 Received: from ams.source.kernel.org ([145.40.68.75]:39338 "EHLO ams.source.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1348922AbiAKI3C (ORCPT ); Tue, 11 Jan 2022 03:29:02 -0500 Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ams.source.kernel.org (Postfix) with ESMTPS id C8B25B81616 for ; Tue, 11 Jan 2022 08:29:01 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPS id 9900DC36AE9 for ; Tue, 11 Jan 2022 08:29:00 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1641889740; bh=6VbmfqIv64PJjYq29M/p1jeGGqErKtmELtuxLcca27M=; h=From:To:Subject:Date:In-Reply-To:References:From; b=D9rX9GjNDCtAgRrMKS7KjfNbaVzoeR46S6+CFHNstJ/4txUmBu1g+sRxC829E5Sw2 UigcsPFMq8zmK4g3rdMUYBrtChpIcfuzpzsOzVxB8P0RIUu2VX//lgGm3YdrWm/XwM OiOWsKzLohq+hSL+4oJbDI1EIn/Rk95cYesJmt4ThcvIuby5xh2iT3AYJcQ5vE+8Lr 9IiysF/K3iFCRI0CmkxMzR1PhKBhq5AR00hVpgYiFHFN7ta35dkUarnUgp4lIQjMaX bLefkamo18a1FxvI/jgabbmS1SQjlYiAB/uRPyGCliXxd7QRerdpbGwBt+0qTxDxjV KJ/2x2NoWnIHw== Received: by aws-us-west-2-korg-bugzilla-1.web.codeaurora.org (Postfix, from userid 48) id 7CA9FC05FE3; Tue, 11 Jan 2022 08:29:00 +0000 (UTC) From: bugzilla-daemon@bugzilla.kernel.org To: kvm@vger.kernel.org Subject: [Bug 215459] VM freezes starting with kernel 5.15 Date: Tue, 11 Jan 2022 08:29:00 +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: th3voic3@mailbox.org 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=3D215459 --- Comment #11 from th3voic3@mailbox.org --- (In reply to mlevitsk from comment #10) > On Mon, 2022-01-10 at 09:30 +0000, bugzilla-daemon@bugzilla.kernel.org wr= ote: > > https://bugzilla.kernel.org/show_bug.cgi?id=3D215459 > >=20 > > --- Comment #9 from th3voic3@mailbox.org --- > > I've compiled the 5.16 kernel now and so far it's looking very good. AP= ICv > > and > > tdp_mmu are both enabled. Also thanks to dynamic PREEMPT I no longer ne= ed > to > > recompile to enable voluntary preemption to cut down my VMs boot time. > >=20 > Great to hear that. >=20=20 > I am just curious, with what PREEMPT setting, the boot is slow? > With full preemption? I also noticed that long ago, before I joined redha= t, > back when I was just a VFIO fan, that booting with large amounts of ram > (32 back then I think), forced preemption and passed-through GPU makes > The VM hang for about like 1/2 of a minute before it shows the bios splash > screen. >=20=20 > Best regards, > Maxim Levitsky Yeah it used to be like that. I just compared the two though (full vs voluntary PREEMPT) and it doesn't s= eem to make a difference anymore. Full preemption is now just as fast as volunt= ary preemption, so I'm just sticking with full preemption since it's my distros default. Best regards Nico --=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.=