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 DA3B585278 for ; Thu, 1 Feb 2024 19:56:54 +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=1706817414; cv=none; b=EjHc870ygBwFA7Q3ubRUlHswkvyDKvum9jg9/JvuL8YbuyHzSm41gHUeR2aqfeCG+/VBUju/NUKXZiQFVsGz5mUhoCs0mLfIts/ZxmF1F7379848wnsnVmIU63NfsMlTTnhaP5baIgzynjzV0DxpbqZGbzrUtDeIvmRspEufnR8= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1706817414; c=relaxed/simple; bh=He7+KGIhUYjTF5NvPD+CinD8Ne2GNfZBLSvX88v4ZaQ=; h=From:To:Subject:Date:Message-ID:In-Reply-To:References: Content-Type:MIME-Version; b=iMzxTMPteL4ylVQA9C1sFVWKeDjiObZnpu2qZO0Quj9xXvM+lYloukc6BZL816IzZD2X/ERXKE839mKnNgXXxZ5xOxip5LSSfd0j5KU+ASQK6LkZ11+c22ANKN5UHdtogf99CiS2FiLfVsIiUnOuGBWGlidfJWUA0OEkdi4m700= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=k69rznO4; 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="k69rznO4" Received: by smtp.kernel.org (Postfix) with ESMTPS id 64BBEC433A6 for ; Thu, 1 Feb 2024 19:56:54 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1706817414; bh=He7+KGIhUYjTF5NvPD+CinD8Ne2GNfZBLSvX88v4ZaQ=; h=From:To:Subject:Date:In-Reply-To:References:From; b=k69rznO4AwA8sxQiNeWQCSN+IMenKv/GW5RRBAz79Fljz8/iRutHG6cwBwMUiJbBm O7L+Hd5v7KSBF4bfT2/2X8cFH0bN8U178r2TOE3AngK8hYHTrL7ZEU2ixGmXjG+rpK 61DeymIMtpC47TCt1Uiw5IBq/MUPF8Ga7gzN8QHI1syzTO+xhee7Yy7z/2SXRUTL2Y yL+agGJJoWMe5v0uQ4trbpOmc9/RoCcv63scHCFfKKIqHl3N0JAMWFgb/Z3DSAWzoA Rk1soeXKfj71eOAdZdeNM7yla1/3Ha3ZpI98B31ekIT63J2dhCpVwztMQEM9m49G8c 1twbKJ9jUviOQ== Received: by aws-us-west-2-korg-bugzilla-1.web.codeaurora.org (Postfix, from userid 48) id 52CB7C53BCD; Thu, 1 Feb 2024 19:56:54 +0000 (UTC) From: bugzilla-daemon@kernel.org To: kvm@vger.kernel.org Subject: [Bug 199727] CPU freezes in KVM guests during high IO load on host Date: Thu, 01 Feb 2024 19:56:53 +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: high X-Bugzilla-Who: gkovacs@gmail.com 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 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=3D199727 --- Comment #24 from Gergely Kovacs (gkovacs@gmail.com) --- To be clear, in our experience aio=3Dthreads and iothread=3D1 solved all VM= freezes on local storage, regardless of the VM running from SATA/SAS HDD or SSD, or NVME SSD, so it's a great mitigating step. Ceph is not solved for us either, therefore using Ceph is still not recommended for KVM storage until this bu= g is actually fixed (instead of mitigated). --=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.=