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 11D71146A8B for ; Mon, 13 May 2024 11:22:44 +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=1715599365; cv=none; b=C4WHYhO6ErHfu+Gs51U21xDffXo7gOXBHnLOSBZOvoazDbE9jtfBDggwwqDRnWTXH6Z6AVIbjuSOLDPCWPuyMLkFXedl62DqszM880Mv+/PMXTB815ENZOq6+yl7VzQAyDc6pRh134wKVweeDE955PNoRYjG8+l/szpAP5TNECs= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1715599365; c=relaxed/simple; bh=O9L/ictdTLb7v2b3rYdfKd3/caBGPnSM7dAbdgWrO9s=; h=From:To:Subject:Date:Message-ID:In-Reply-To:References: Content-Type:MIME-Version; b=kwnPUOwK1lvFlPMYfYUfI4pkY1bh4x9yAM/0GDKH909MtvYh3jwISzqymDtBvNT0OpPiNuWyAg0khKG+4jq+ucOFS6uqcJufbnitry/N4jlFd/uROb98DYPVU+Ep1S8cK0QIMogUXdjQmnk0TeMrgRunFaWJSDqvxCfg8a6HcXs= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=MQy4hSje; 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="MQy4hSje" Received: by smtp.kernel.org (Postfix) with ESMTPS id 88815C4AF09 for ; Mon, 13 May 2024 11:22:44 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1715599364; bh=O9L/ictdTLb7v2b3rYdfKd3/caBGPnSM7dAbdgWrO9s=; h=From:To:Subject:Date:In-Reply-To:References:From; b=MQy4hSjerKwKcQy6KQtRrO/H6fOkMrm6CKOlEyRolnIXf5Tia9yQfz6Fnd6onaQoh t5NPlDEHHu4/jB0zMG0FdwS0bLD/qxGMuvNQinFGQ72MqwWYdP7j1zUV1amGgkzZHr +pJ98DDkqPZN6myqtVSaaPtBZSXIChVTnvZWsS08LGuZ6gJKdU7OnQI+MU+qpSiibd BoKOFUsNOn44Uc7XTiiqxvfZ5mNijR+djqr/Ws+wZTZo8/kL5fsDlg90OFco3jEq1c 0Az7flbE+PmNtXphMVA0woMono1oGTrxUOF2nKw4SfIOpwLZGleMXcoab3Z4MFwCRF ynsYrMM9/GRmQ== Received: by aws-us-west-2-korg-bugzilla-1.web.codeaurora.org (Postfix, from userid 48) id 7F664C433DE; Mon, 13 May 2024 11:22:44 +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, 13 May 2024 11:22:44 +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: imammedo@redhat.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 Igor Mammedov (imammedo@redhat.com) changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |imammedo@redhat.com --- Comment #5 from Igor Mammedov (imammedo@redhat.com) --- (In reply to Frantisek Sumsal from comment #4) > (In reply to Sean Christopherson from comment #3) > > Given that 6.7 is still broken, my money is on commit d02c357e5bfa ("KV= M: > > x86/mmu: Retry fault before acquiring mmu_lock if mapping is changing")= .=20 > > Ugh, which I neglected to mark for stable. > >=20 > > Note, if that's indeed what's to blame, there's also a bug in the kerne= l's > > preemption model logic that is contributing to the problems. > > https://lore.kernel.org/all/20240110214723.695930-1-seanjc@google.com >=20 > You're absolutely right. I took the C9S kernel RPM (5.14.0-436), slapped > d02c357e5bfa on top of it, and after running the same tests as in previous > cases all the soft lockups seem to be magically gone. Thanks a lot! >=20 > I'll run a couple more tests and if they pass I'll go ahead and sum this = up > in a RHEL report, so the necessary patches make it to C9S/RHEL9. Thanks for reporting it upstream, as for C9S it should be fixed in kernel-5.14.0-444.el9 https://issues.redhat.com/browse/RHEL-17714 --=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.=