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 3639B14659B for ; Mon, 8 Apr 2024 20:19:40 +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=1712607581; cv=none; b=Kuqmhzk8872SpIqqEAlD01l2t73ikUpmXeEsaNshrWjmsS5ohQlRP3qoJDuQTCbLOemJHzHYtMOKZjZelTRvnwSm+LtBjOr0YXihQ9J/eKiwsUfw0WMUWSpy7OaFdo+ZXTCJzZxekQinjTfSlZBumfo4hbcdUr/2kqT19ArSdKY= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1712607581; c=relaxed/simple; bh=tAo06xeu17uOkSnEC/Gp+GAR1IBMrc4JfkGQOXb4Wtc=; h=From:To:Subject:Date:Message-ID:In-Reply-To:References: Content-Type:MIME-Version; b=eRkYQUuoo8DBJPAwZYWIPngtM8MvMPppFOXMIoLdF64r0BrTGojNw22OW+p8x9BWhcc5lJJlGCwMxWbeSH6s98+rOzY9lRg6h6+TbHbP6czSTZ3hCJG3Aw9WsHYFcDLJZUbZWpf8DBqgo1IKXwnoztqhkaQamoza46ZezYjfcHA= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=cS2h6igt; 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="cS2h6igt" Received: by smtp.kernel.org (Postfix) with ESMTPS id BABC1C433F1 for ; Mon, 8 Apr 2024 20:19:39 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1712607580; bh=tAo06xeu17uOkSnEC/Gp+GAR1IBMrc4JfkGQOXb4Wtc=; h=From:To:Subject:Date:In-Reply-To:References:From; b=cS2h6igtOpWYSWfZKcsbtBPVdMaNLkT4rnWsYBizLjAMKa3Ehoss57UpOh+1wrcb3 CYvCwZ7uh3xhCQvs79vk3vFiJPLS2RgMIF7P5idvTFPQFY5zjoVhPllQf8Tqv74A4q 7i/7QR75Bn+Rn7hITFl3jEPBIb5Fx/BFr00ubtDza0tl/SHjGqxWWIhIXnVPxkbsqQ QynCDtGEr+H9BLKh8Ij71iIH+EfaEVPDsys56WbY1htYYfkURzUgQTnG8Rfw0j2P4C qAzddGxkSm51dY/6P34iLoQZmmtOLzqhDnIoMdcCRecaGXQZHJ7H1lkb7w69XyIKyp Fu+7b8DgGa2cg== Received: by aws-us-west-2-korg-bugzilla-1.web.codeaurora.org (Postfix, from userid 48) id B0200C53BD3; Mon, 8 Apr 2024 20:19:39 +0000 (UTC) From: bugzilla-daemon@kernel.org To: kvm@vger.kernel.org Subject: [Bug 218684] CPU soft lockups in KVM VMs on kernel 6.x after switching hypervisor from C8S to C9S Date: Mon, 08 Apr 2024 20:19:39 +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: seanjc@google.com X-Bugzilla-Status: RESOLVED X-Bugzilla-Resolution: PATCH_ALREADY_AVAILABLE X-Bugzilla-Priority: P3 X-Bugzilla-Assigned-To: virtualization_kvm@kernel-bugs.osdl.org X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: cc 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: kvm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 https://bugzilla.kernel.org/show_bug.cgi?id=3D218684 Sean Christopherson (seanjc@google.com) changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |seanjc@google.com --- Comment #3 from Sean Christopherson (seanjc@google.com) --- Given that 6.7 is still broken, my money is on commit d02c357e5bfa ("KVM: x86/mmu: Retry fault before acquiring mmu_lock if mapping is changing"). U= gh, which I neglected to mark for stable. Note, if that's indeed what's to blame, there's also a bug in the kernel's preemption model logic that is contributing to the problems. https://lore.kernel.org/all/20240110214723.695930-1-seanjc@google.com --=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.=